Abstract: A method for establishing a video conference is provided. The method is applied in a video conferencing system. The system has a first electronic device, a second electronic device, a third electronic device, a fourth electronic device, and a server. The first and second electronic devices are associated with a first user. The third and fourth electronic devices are associated with a second user. The method is capable of building an audio communication between the first electronic device and the third electronic device over a telecommunications network; and building a video communication between the second electronic device and the fourth electronic device over an IP network simultaneously, wherein the video communication is parallel to the audio communication.

Abstract: A conferencing server (100) receives incoming bitstreams (I1, I2, I3, I4, I5) carrying media data from respective conferencing endpoints (110, 120, 130, 140, 150); receives a mixing strategy (M) specifying properties of at least one outgoing bitstream (O1, O2, O3, O4, O5) and requiring at least one additive media mixing step; and supplies at least one outgoing bitstream by executing, in a processor (103) and a memory (102) with a plurality of memory spaces, a run list of operations selected from a predefined collection of primitives and realizing the received mixing strategy. A pre-processor (104) in the server derives said run list repeatedly and dynamically while taking into consideration determined momentary activity in each incoming bitstream. In embodiments, the run list may be derived by (a) pruning of an initial run list, (b) constrained or non-constrained minimization of a cost function, or (c) automatic code generation.

Abstract: A communication management system manages communication terminals transmitting and receiving communication data.

Abstract: A communication management system receives identification information of a first communication terminal, obtains identification information of a candidate second communication terminal that is associated with the identification information of the first communication terminal, and obtains communications protocol information indicating a communications protocol of the candidate second communication terminal using a part of the identification information of the candidate second communication terminal. The communication management system determines whether the communications protocol is the same for the first communication terminal and the candidate second communication terminal, and transmits information based on the determination result.

Abstract: A transmission terminal is connected to a management apparatus, which stores information on a destination in a first communication mode associated with a plurality of transmission terminals, via a network. The transmission terminal includes a transmission unit that sends data including at least voice data; a voice input unit, that inputs the voice data; and a determination unit that determines whether the transmission terminal is in the first communication mode or not based on an input volume level of the voice data, input by the voice input unit. When the determination unit determines that the transmission terminal is in the first communication mode, the data sent by the transmission unit is relayed only to an other transmission terminal of the transmission terminals, which communicate with the transmission terminal. The other transmission terminal corresponds to the destination associated with the transmission terminal in the management apparatus.

Abstract: A plural camera images capturing and processing apparatus includes a plurality of cameras that capture images of a plurality of adjacent imaging regions which overlap each other, a plurality of laser devices that give a marker to each common imaging region in which imaging regions overlap each other, an imaging control unit that controls each camera and each laser device and acquires a markerless image group to which no marker is given and a marker-given image group to which the marker is given, a non-visible light image processing unit that calculates a correction parameter, which is information for aligning the inclinations, sizes, and positions of the imaging regions, on the basis of the marker-given image group, and a visible light image processing unit that composes the markerless image group to generate a composite image, on the basis of the correction parameter.

Abstract: An apparatus for creating a panorama is provided, the apparatus including an image obtainer to obtain at least two images via at least two cameras, an overlapping area analyzer to analyze an overlapping area among the at least two cameras, and extract overlapping image information, an image segmentation unit to segment the at least two images in an object unit, and generate image segmentation information, a depth value extractor to extract a depth value of an object in the at least two images, an image focus setter to set a focus value based on the depth value for the plurality of segmented objects, and a panorama creator to create panorama content of which a focus is convertible using the image segmentation information and the focus value.

Abstract: A method and apparatus for photography using an electronic device. The method and apparatus include a preview display operation of displaying a first image output from a first image sensor as a main image, and displaying a second image photographed by a second image sensor as a sub-image. A panorama photography operation of buffering the main image is executed when a panorama photography operation is requested. The sub-image is captured from a preset frame. When the panorama photographing operation is terminated, a composition panorama is generated from a panorama image of the main image, and compositing with the captured sub-image.

Abstract: Methods and apparatus provide for generating a component image in which, with images picked up using a front side camera and a rear side camera built in portable equipment, posture information of the portable equipment is associated; combining a plurality of component images between which the posture of the portable equipment is different to generate a synthesis image; changing over an image pickup mode between a double-sided synthesis image pickup mode in which a synthesis image of one half circumference picked up by the front side camera and a synthesis image of one half circumference picked up by the rear side camera are connected to each other to pick up a synthesis image of a whole circumference and a single-sided synthesis image pickup mode in which a synthesis image of a whole circumference is picked up by each of the front side camera and the rear side camera.

Abstract: A method and apparatus. The method includes the steps of a security camera capturing a panoramic field of view of a secured area, separating portions of the panoramic field of view into a plurality of sub-views that each depict at least some time-related portion of an event detected within the secured area and simultaneously displaying the plurality of sub-views within separate respective windows of a display.

Abstract: Techniques are described for deriving a disparity vector for a current block based on a disparity motion vector of a neighboring block in a 3D-AVC video coding process. The disparity vector derivation allows for texture-first coding where a depth view component of a dependent view is coded subsequent to the coding of the corresponding texture component of the dependent view.

Abstract: An imaging system for digital stereo microscope is disclosed, wherein the system comprising two camera units with each camera unit comprises a lens and the two lenses of the two camera units are focused below the respective lens and optical axes of both lenses are arranged to focus at a same point; a main controller configured to provide both sensors with a common trigger signal for outputting image data and a common pixel reference clock signal for each sensor to generate its own pixel clock signal; a synchronous synthesizer for generating synthesized image data with left eye image data located on the left side and the right eye image data located on right side by synchronizing and synthesizing the left eye data and the right eye image data output by the respective sensor; the synthesized image data is compresses and encoded in the main controller to generate RGB image data corresponding to parallel image data; a stereoscopic display convertor for receiving the RGB image data and converting the received RGB

Abstract: A first RGB converter is configured to convert a luminance signal and a color difference signal of a first frame signal to a first RGB signal. The first frame signal is a current frame having a first number of bits. A second RGB converter is configured to place at least one lower bit of the first frame signal on the least significant bit side of a second frame signal to form composite data having the first number of bits and to convert the composite data to a second RGB signal. The second frame signal is a previous frame having a second number of bits composed of upper bits of the first number of bits other than at least one lower bit. An overdrive processing unit is configured to correct an amplitude of the first RGB signal corresponding to the difference between the first and second RGB signals.

Abstract: A laser frame tracer (12) including a laser measuring unit (20) with a laser (36) and one or more cameras (38, 40) for optically measuring dimensions of eyeglass frames (10). A frame carrier (22) is provided for moving the eyeglass frames (10) through a laser line emitted by the laser (36). The frame carrier (22) includes a linear carriage (44) and a rotary carriage (88). Movement of the linear carriage (44) and the rotary carriage (88) are controlled by an on-board computer (116) which collects image data from the one or more cameras (38, 40). Image data is processed to determine a 3D model from which selected dimensions for the eyeglass frames (10) may be measured. The dimensions may be stored in a cloud database for access by others in cutting lenses to fit the eyeglass frames (10).

Abstract: A laser frame tracer (12) including a laser measuring unit (20) with a laser (36) and one or more cameras (38, 40) for optically measuring dimensions of eyeglass frames (10). A frame carrier (22) is provided for moving the eyeglass frames (10) through a laser line emitted by the laser (36). The frame carrier (22) includes a linear carriage (44) and a rotary carriage (88). Movement of the linear carriage (44) and the rotary carriage (88) are controlled by an on-board computer (116) which collects image data from the one or more cameras (38, 40). Image data is processed to determine a 3D model from which selected dimensions for the eyeglass frames (10) may be measured. The dimensions may be stored in a cloud database for access by others in cutting lenses to fit the eyeglass frames (10).

Abstract: An imaging device capable of capturing depth information or surface profiles of objects is disclosed herein. The imaging device uses an enclosed flashing unit to project a sequence of structured light patterns onto an object and captures the light patterns reflected from the surfaces of the object by using an image sensor that is enclosed in the imaging device. The imaging device is capable of capturing an image of an object such that the captured image is comprised of one or more color components of a two-dimensional image of the object and a depth component that specifies the depth information of the object.

Abstract: An embodiment of the invention provides a camera comprising a photosurface having a substrate comprising photopixels and associated storage pixels and a controller that controls the photosurface to image a scene by maintaining a bias between the photopixels and their respective storage pixels at all times during an exposure period of the photosurface so that photocharge, substantially upon its generation in a photopixel by light from the scene incident on the photopixel moves towards the photopixel's storage pixel.

Abstract: A video refocusing system operates in connection with refocusable video data, information, images and/or frames, which may be light field video data, information, images and/or frames, that may be focused and/or refocused after acquisition or recording. A video acquisition device acquires first refocusable light field video data of a scene, stores first refocusable video data representative of the first refocusable light field video data, acquires second refocusable light field video data of the scene after acquiring the first refocusable light field video data, determines a first virtual focus parameter (such as a virtual focus depth) using the second refocusable light field video data, generates first video data using the stored first refocusable video data and the first virtual focus parameter, wherein the first video data includes a focus depth that is different from an optical focus depth of the first refocusable light field video data, and outputs the first video data.

Abstract: An electronic device (100) includes a depth sensor (120), a first imaging camera (114, 116), and a controller (802). The depth sensor (120) includes a modulated light projector (119) to project a modulated light pattern (500). The first imaging camera (114, 116) is to capture at least a reflection of the modulated light pattern (500). The controller (802) is to selectively modify (1004) at least one of a frequency, an intensity, and a duration of projections of the modulated light pattern by the modulated light projector responsive to at least one trigger event (1002). The trigger event can include, for example, a change (1092) in ambient light incident on the electronic device, detection (1094) of motion of the electronic device, or a determination (1096) that the electronic device has encountered a previously-unencountered environment.

Abstract: [Object] To preferably set a focus distance and a convergence distance. [Solving Means] A three-dimensional image pickup apparatus 100 is provided with a left lens optical system 121L and a right lens optical system 121R including a pair of right and left image pickup lenses disposed at a predetermined inter axial distance. Further, a focus ring that adjusts the focus of the left lens optical system 121L and the right lens optical system 121R and a control circuit that adjusts a convergence distance from a convergence point at which optical axes of the pair of right and left image pickup lenses are intersected to the image pickup lenses. The control circuit adds the offset distance to the focus distance and adjusts the convergence distance with the offset distance set as a distance from a focus point to a convergence point to be set.

Abstract: The technology disclosed relates to adjusting the monitored field of view of a camera and/or a view of a virtual scene from a point of view of a virtual camera based on the distance between tracked objects. For example, if the user's hand is being tracked for gestures, the closer the hand gets to another object, the tighter the frame can become—i.e., the more the camera can zoom in so that the hand and the other object occupy most of the frame. The camera can also be reoriented so that the hand and the other object remain in the center of the field of view. The distance between two objects in a camera's field of view can be determined and a parameter of a motion-capture system adjusted based thereon. In particular, the pan and/or zoom levels of the camera may be adjusted in accordance with the distance.

Abstract: An image processing system comprises an image processor configured to identify one or more potentially defective pixels associated with at least one depth artifact in a first image, and to apply a super resolution technique utilizing a second image to reconstruct depth information of the one or more potentially defective pixels. Application of the super resolution technique produces a third image having the reconstructed depth information. The first image may comprise a depth image and the third image may comprise a depth image corresponding generally to the first image but with the depth artifact substantially eliminated. An additional super resolution technique may be applied utilizing a fourth image. Application of the additional super resolution technique produces a fifth image having increased spatial resolution relative to the third image.

Abstract: A frame-sequential multiwavelength imaging system comprises a wavelength switching device for producing a repeated series of different wavelength profiles, a detector for detecting the dynamic scene and a signal processing unit for synthesizing a dynamic multiwavelength image of the dynamic scene. The signal processing unit may comprise at least one input device at least one logic device and at least one output device. The system can be used in a method to perform multiwavelength imaging of a dynamic scene, typically for surgical purposes.

Abstract: An electronic device (100) includes a first imaging camera (116) and a second imaging camera (114) disposed at a first surface (106). The first imaging camera (116) has a first angle of view and the second imaging camera (114) has a second angle of view greater than the first angle of view. The electronic device (100) further includes a depth sensor (120) disposed at the first surface (106). The depth sensor can include a modulated light projector (119) to project a modulated light pattern (500) and at least one of the first imaging camera (116) and the second imaging camera (114) to capture a reflection of the modulated light pattern (500). The electronic device (100) further can include a third imaging camera (118) disposed at a second surface (104).

Abstract: A system and method for optical measurement, the system comprising a camera having a lens unit and an image sensor, the image sensor configured to generate image data based on light received onto the sensor; a prism device to receive light from two different angles and to relay the light through the lens unit onto respective two portions of the image sensor; and a processor to receive image data from the two portions of the image sensor; identify key points of the image data from the two portions; create a three-dimensional model of an object based on the image data from the two portions; and calculate based on the key points parameters of the object.

Abstract: A method, device and apparatus for generating stereoscopic images using a non-stereoscopic camera. In one embodiment, a first image of a scene is captured using a non-stereoscopic camera of an electronic device. In order to create a stereoscopic image, two images are captured from two different viewpoints. In order to achieve this, a guided preview screen is displayed on a display unit of the electronic device to guide the user in capturing a second image. The guided preview screen indicates a direction in which the electronic device has to be moved to capture the second image. The second image of the scene is captured using the non-stereoscopic camera once the guided preview screen indicates that the second image can be captured. A stereoscopic image of the scene is produced and displayed on the display unit using the first image and the second image.

Abstract: A 3D subtitle process device causes a 3D display device to three-dimensionally display subtitles each indicated in corresponding subtitle data, including the following units. A setting control unit controls subtitle display setting regarding a subtitle display method performed by the 3D display device. A depth correction unit corrects at least one depth information included in corresponding subtitle data, so that a subtitle that starts display earlier among the subtitles is three-dimensionally displayed to appear deeper, when the subtitle display setting instructs a change of the subtitle display method and subtitles each indicated in corresponding subtitle data are to be displayed temporally overlapping on a screen. A subtitle drawing unit generates a 3D subtitle image from the pieces of the subtitle data in which at least one depth information has been corrected, so as to cause the 3D display device to three-dimensionally display the subtitles.

Abstract: A stereoscopic display apparatus is provided. The stereoscopic display apparatus includes a liquid crystal panel, a backlight, a controller and an active polarizer disposed adjacent to the liquid crystal panel. The liquid crystal panel alternately displays a left image and a right image to passive polarized glasses according to a synchronization signal. The backlight supplies light to the liquid crystal panel. The controller provides the left image, the right image and the synchronization signal according to a video input signal. The active polarizer polarizes the light from the backlight in response to the synchronization signal to form two viewing zones, such that the left image and the right image are observed by the passive polarized glasses via the corresponding zones, respectively.

Abstract: A glasses-type radio communication device (1) which is to be worn on the head of a user, includes: right and left eyepiece parts (11); and an antenna (110) for carrying out radio communication, the antenna (110) being a dipole antenna including an antenna element (100) and a power feeding section (101) which supplies electric power to the antenna element (100), the power feeding section (101) being provided between the right and left eyepiece parts (11).

Abstract: A stereoscopic image display device includes: a display panel in which pixels each constituted with N×N pieces (N is a natural number of 2 or larger) of sub-pixels colored in M (M is a natural number of 1 or larger) primary colors are arranged in matrix; and an optical separation module in which optical elements which distribute exit light from each of the pixels according to parallax images in a first direction and a second direction along layout of the pixels are arranged by being corresponded to each of the pixels. The neighboring sub-pixels within the pixels are of different colors, array pitches of the sub-pixels are uniform in the first and second directions, same numbers of the parallax images are displayed for the first direction and the second direction within the pixels, and numbers of the sub-pixels in different colors within the parallax images are equivalent.

Abstract: An imaging unit includes: a columnar optical member including an incident surface on which light is incident, a reflecting surface for reflecting the light incident from the incident surface in a direction different from the incident surface, and an emission surface for causing the light incident from a direction orthogonal to the incident surface and reflected from the reflecting surface to travel in a straight line and emitting the light to the outside; an imaging device including a light receiving unit, formed on a surface of the imaging device, for receiving the light emitted from the emission surface and performing photoelectric conversion on the light; and a cylindrical imaging holder, protruding from at least part of an outer edge of one end in line with a side surface shape of the optical member, for defining the position of the incident surface and holding the optical member.

Abstract: Systems and methods for detecting and attenuating shadows in a visible light image are disclosed. In various embodiments, shadows on human skin may be detected and attenuated using multi-spectral imaging techniques. Multispectral image data that includes a living subject can be processed to detect live-subject portions of the multispectral image data. Shadows in the detected live-subject portions of the multispectral image data can be identified. The identified shadows in at least part of the multispectral image data can be attenuated.

Abstract: A driver monitoring camera system for a vehicle includes a camera system and an optical beam shaper. The camera system has an exit field of view central axis oriented more vertical than horizontal with respect to a set of orthogonal x, y and z axes, where the z-axis defines a direction line indicative of a vertical direction. The optical beam shaper is disposed in optical communication with the camera system and optically between the camera system and an operator of the vehicle. The optical beam shaper is structurally configured to direct an image of a face of an operator of the vehicle toward the exit field of view of the camera system, and is structurally configured to compress the image in the vertical direction to define a compressed image having a height to width aspect ratio of less an uncompressed height to width aspect ratio of the image.

Abstract: An information processing apparatus according to one aspect of the present invention is disclosed, which includes an image acquiring unit acquiring moving images captured as images of a watching target person and a target object as a reference for the behavior thereof, a moving object detecting unit detecting a moving-object area with a motion occurring from the moving images, and a behavior presuming unit presuming a behavior of the watching target person about the target object corresponding to a positional relationship between a target object area set within the moving images and the detected moving-object area.

Abstract: A personal identification system, which uses a vein pattern of a finger, optimizes the amount of light of a light source based on a captured finger image and emphasizes the vein pattern during image processing for identification.

Abstract: A system for performing a medical procedure on a patient is provided. The system can include an imaging head defining a field of view relative to the patient. The imaging head can include at least one transmitter that emits at least one signal in the field of view, and at least one receiver that receives at least one reflected signal from the field of view. The at least one reflected signal received can be based on at least one electrical property of at least one material in the field of view. The system can further include a workstation, which can determine, based on the at least one reflected signal received by the at least one receiver, a location of at least one boundary of the material within the field of view. The system can include a display that displays an image of the location of the at least one boundary.

Abstract: A weight value used for a beamforming process performed on received signals in an ultrasound imaging apparatus is obtained with a small amount of computations and with a high degree of precision, even when a method of adaptive signal processing is employed. Multiple elements 401 receive ultrasound signals from a test subject, and the similarity operator 404 obtains the similarity between the received signals x(n). By using the similarity C(n) between the received signals obtained by the similarity operator 404, the adaptive weight operator 407 computes the adaptive weight w(n) in association with the similarity. The beamforming operator 408 uses the adaptive weight w(n) and the received signal x(n) to generate a beamforming output. The imaging processor 108 uses the beamforming output to generate image data. By way of example, the similarity operator 404 performs computations of the similarity in the time direction.

Abstract: The present invention discloses a smart photographing apparatus, comprising a casing, a first photographing module, a second photographing module, and a control module. The first photographing module comprises a sensing lens installed on one side of the casing to capture eye motion images when a photographer is blinking. The second photographing module comprises a photographing lens installed on the other side of the casing to execute an image capturing function of shooting an image of a target. The control module is connected to the first photographing module and the second photographing module, and the control module generates an image capturing instruction upon receiving the eye motion images and controls the second photographing module to execute the image capturing function according to the image capturing instruction.

Abstract: A support information display method is provided with an acquiring process for acquiring a first image by photographing, via a camera provided in a head mount display, a predetermined part of a substrate processing apparatus as a maintenance object, an estimating process for estimating the support information related to the predetermined part in the first image from information stored in a database, an image creating process for creating a second image by converting the support information estimated in the estimating process into an image, and a displaying process for displaying the second image on the head mount display in order for the operator to visually recognize the support information.

Abstract: A device for applying conductive glue and assembling a glued photoelectric element on a substrate operates a vacuum-lift nozzle, a driver, a first camera module, a second camera module, and a third camera module. The first, second, and third camera modules take images of the photoelectric element on a supply tray, check for absence of tilt during a dipping into the conductive glue, and supervise the accurate positioning of the photoelectric element onto a substrate on an output tray.

Abstract: Disclosed is monitoring device of monitoring a state of a substrate processing process in a substrate processing apparatus. The monitoring device includes: an imaging unit configured to image a processing state of the substrate processing process; a storage unit; a storage control unit configured to store a moving picture imaged by the imaging unit after adding a time stamp to the moving picture; a group classification unit configured to group a plurality of moving pictures stored in the storage unit into moving pictures of a normal group and moving pictures of a group other than the normal group; and a threshold generation unit configured to generate a threshold for detecting an abnormal moving picture based on the moving pictures of the normal group grouped by the group classification unit.

Abstract: The distance between vehicles is calculated in a comparatively simple and accurate manner. To achieve this, a target vehicle traveling ahead of one's own vehicle is imaged by a camera mounted one one's own vehicle. The image of the target vehicle is detected from the captured image. The position of a vanishing point and the position of a lower edge of the image representing the target image are detected from the captured image. The distance to the target vehicle is calculated based upon the detected positions.

Abstract: An appearance inspection device and an appearance inspection method, capable of teaching a line pattern having an arbitrary shape as a portion to be inspected, in relation to a captured image of an inspection object, by a simple teaching operation. The device has an image storing part, a teaching part, an inspecting part and an inspection factor storing part. The teaching part obtains an image of the inspection object in the teaching process, and teaches the position of an inspection point, the position and the angle of an inspection region relative to the inspection point, the inspection factor and a judgment condition. The teaching factor storing part stores a setting parameter and a teaching factor. The inspecting part executes inspection based on the teaching factor in the inspecting process.

Abstract: Optical inspection system and methods for detecting surface discontinuity defects in glass sheet are disclosed. A reflective diffuser resides adjacent a back surface of the glass sheet and is illuminated with gradient intensity illumination. A digital camera having a two-dimensional image sensor resides adjacent the front surface of the glass sheet. The digital camera has, at the reflective diffuser, an acceptance circle that shifts relative to the gradient illumination due to the surface discontinuity. The shift causes the digital inspection image to change intensity, and the change is faster than if the illumination of the reflective diffuser had uniform intensity.

Abstract: Method for object marking using a three-dimensional surface inspection system using two-dimensional recordings and method by simple recording of two-dimensional images of a component and comparing the images with a known three-dimensional model for enabling the three-dimensional real structure of a component to be captured using best fit. Photographing measuring points in a measuring point pattern and orienting the component with reference to markers at the points enables orienting the two-dimensional images with the three-dimensional model.

Abstract: A portable lateral test reader apparatus includes a processing arrangement, a digital camera, a user interface. The digital camera captures at least one image of locations of at least one test line, at least one control line and at least one reference of a test structure. The processing arrangement measures an intensity associated with the at least one test line, an intensity associated with the at least control line and an intensity of the at least one reference in the at least one image, forms a test result as a function of measured intensities associated with the at least on test line, the at least control line and the at least one reference, and outputs the test result using the user interface.

Abstract: An electronic device includes a modulated light projector to project an infrared light pattern and an image sensor. The image sensor includes an array of photosensors and a filter array overlying the array of photosensors. The filter array comprises a mosaic of color filter elements and infrared filter elements, each color filter element overlying a corresponding photosensor of a first subset of photosensors and each infrared filter element overlying a corresponding photosensor of a second subset of photosensors. The electronic device further includes a controller to, in a first mode, control the image sensor to capture a color image using the first subset of photosensors and, in a second mode, control the image sensor to capture a depth image representing a reflection of the infrared light pattern using the second subset of photosensors.

Abstract: Disclosed herein is a sensor lighting which is installed in a building such as a dwelling. The sensor lighting according to the present invention is provided with an image recording unit that includes a sensor module, a camera module and a recording module. The sensor lighting includes a base body, a removable cover body and a light transmission body. The recording module is mounted to the base body, and the sensor module and the camera module are mounted to the removable cover body such that the sensor module and the camera module are partially exposed to the outside of the removable cover body. Therefore, the sensor lighting not only can substitute for the existing sensor lighting but can also function as an image recording device.

Abstract: A camera apparatus includes a rotatable camera unit; a filter unit which is configured to selectively take at least one of a covering state and a standby state, wherein the covering state covers a light incident portion of the camera unit with a filter and the standby state removes the filter from the light incident portion; a controller which is configured to control a rotation of the camera unit and a state of the filter unit; and a memory which stores posture information including a direction of the camera unit and filter information representing at least one of the covering state and the standby state of the filter unit. The controller controls the direction of the camera unit based on the posture information stored in the memory and controls the filter unit based on the filter information stored in the memory.

Abstract: A drive controller is configured to control an imaging unit so that a subject is imaged at a first exposure mode and imaged at a second exposure mode. A gain controller is configured to set equal to each other luminance amplitudes of a first and second image signals due to the difference in exposure time period of a first luminance signal obtained by imaging the subject in the first exposure mode and a second luminance signal obtained by imaging the subject in the second exposure mode. A determination unit is configured to detect a change between each frame of high-frequency components included in the first and second luminance signals whose luminance amplitudes are set equal to each other and to determine that the image of a surveillance area has changed when an amount of a detected change is equal to or larger than a predetermined value.