Abstract: In some examples, a display can modify brightness of displays using pixel luminance by detecting a luminance of pixels included on the display, and modifying a screen brightness of the display by modifying a brightness of a backlight of the display within a predetermined time when the detected luminance of the pixels on the display exceeds a predetermined luminance threshold.

Abstract: The present disclosure relates to systems and methods for transmitting Standard Dynamic Range (SDR) content. The systems and methods may use a modified Electro-Optical Transfer Function (EOTF) curve to convert nonlinear color values of SDR content into optical output values of modified SDR content. The systems and methods may encode the modified SDR content using eight bits while preventing banding. The systems and methods may transmit the encoded data to a client device for presentation on a display.

Abstract: The present disclosure relates to an image display apparatus. The image display apparatus includes: a display; and a controller configured to control the display, wherein the controller detects a first peak area corresponding to a luminance value greater than or equal to a first reference value, and a second peak area corresponding to a luminance value between the first reference value and a second reference value less than the first reference value, in response to the number of pixels in the second peak area being less than or equal to a predetermined number, the controller performs first tone mapping based on the first peak area, the controller performs second tone mapping based on the first peak are and the second peak area, wherein a luminance value of the second peak area during the second tone mapping is greater than a luminance value of the second peak area during the first tone mapping. Accordingly, luminance and contrast during displaying image may be improved.

Abstract: Systems and methods are described for providing viewers of adaptive bit rate (ABR) streaming video with the option to view alternative streams in which an alternative tone mapping is applied to one or more regions of interest. The availability of streams with alternative tone mappings may be identified in a media presentation description (MPD) in an MPEG-DASH system. In some embodiments, the streaming video is divided into slices, and alternative tone mappings are applied to regions of interest within the slices. When a server receives a request from a client device for alternative tone mappings of different regions, slices with the appropriate mapping may be assembled on demand and delivered to the requestor as a single video stream. Tone mappings may be used, for example, to highlight particular players in a sporting event.

Abstract: A color compensation method includes obtaining a target brightness, a target frame rate and a target pulse number; selecting a plurality of second gamma groups from a plurality of first gamma groups according to the target brightness and the target pulse number, wherein the plurality of first gamma groups respectively correspond to a plurality of frame rates; and calculating the compensation value to compensate the display brightness and color according to the target brightness, the target frame rate, the plurality of second gamma groups and a calculation method.

Abstract: An optical scanning endoscope device includes: a laser element; an optical fiber that guides laser light from the laser element; a first detector that detects a guided light amount of the laser light in the optical fiber; a second detector that detects light from a subject and outputs a detection signal; a first calculator that calculates an optical coupling ratio between the laser element and the optical fiber on the basis of the guided light amount; a second calculator that calculates a degradation ratio of the laser element on the basis of the guided light amount; a first adjuster that adjusts the magnitude of the detection signal on the basis of the optical coupling ratio; and a second adjuster that adjusts the output light amount of the laser light from the laser element on the basis of the degradation ratio.

Abstract: The present disclosure relates to systems and methods for transmitting Standard Dynamic Range (SDR) content. The systems and methods may use a modified Electro-Optical Transfer Function (EOTF) curve to convert nonlinear color values of SDR content into optical output values of modified SDR content. The systems and methods may encode the modified SDR content using eight bits while preventing banding. The systems and methods may transmit the encoded data to a client device for presentation on a display.

Abstract: One embodiment provides a method comprising determining multi-dimensional metadata corresponding to an input image, and determining ambient light information indicative of a level of ambient light in an ambient environment of a display device. The multi-dimensional metadata comprises a cumulative distribution function (CDF) of pixels in the input image. The method further comprises determining, based on the multi-dimensional metadata and the ambient light information, one or more gains that adaptively compensate for the level of ambient light in the ambient environment. The method further comprises generating a tone mapping function based on the one or more gains, and applying the tone mapping function to the input image to generate a tone-mapped image that adaptively compensates for the level of ambient light in the ambient environment. The tone-mapped image is provided to the display device for presentation.

Abstract: Disclosed are a method for adjusting a video parameter based on voiceprint recognition, a device for adjusting a video parameter based on voiceprint recognition and a readable storage medium, where the method includes: during a video program is displayed on a smart terminal, receiving audio information collected by a voiceprint data collection module; in a determination that a voiceprint feature library includes target preset audio information corresponding to the audio information, determining user identity information and user mood information corresponding to the audio information based on the target preset audio information; acquiring an adjustment parameter of a parameter adjustment mode corresponding to the user mood information, and acquiring an adjustment ratio corresponding to the parameter adjustment mode based on the user identity information; and adjusting a video playback parameter of the smart terminal based on the adjustment parameter and the adjustment ratio.

Abstract: A video signal processing method includes obtaining a first linear luminance signal based on a first linear red green blue (RGB) signal corresponding to a video signal, converting the first linear luminance signal into a first non-linear luminance signal, performing a piecewise luminance mapping on the first non-linear luminance signal to obtain a second non-linear luminance signal, converting the second non-linear luminance signal into a second linear luminance signal, calculating a luminance gain between the second linear luminance signal and the first linear luminance signal, and obtaining, based on a product of the luminance gain and the first linear RGB signal, an RGB display signal corresponding to the video signal.

Abstract: The present disclosure provides a control method of a display screen and a control apparatus of a display screen. The control method of a display screen of the present disclosure includes: detecting, using an ultrasonic detection device, whether there is a viewer present in a viewable range of the display screen, and generating a detection result; and controlling on-off status of the display screen according to the detection result.

Abstract: A display device with excellent visibility can be provided. The display device includes a display region displayed by a light-emitting element. In the display region, a point touched by a user is a first point, a point which has been touched by the user prior to the first point is a second point, a vector that starts at the first point and ends at the second point is a first vector, a vector obtained by multiplying the first vector by k (k is a real number) is a second vector, and a point that is the second vector away from the first point is a third point, the display region includes a first region and a second region obtained by excluding the first region from the display region, The first region includes a first circle and a second circle, the center of the first circle is the first point, and the center of the second circle is the third point. The luminance in the first region is higher than the luminance in the second region.

Abstract: The present disclosure relates to a 5G or pre-5G communication system to be provided to support a higher data transmission rate after a 4G communication system such as LTE. An embodiment of the present specification relates to beamforming in a mobile communication system and comprises a step for configuring an operation of a limiter circuit for adjusting amplitude of a signal received by a receiver, and receiving the signal according the configuration. According to various embodiments of the present specification, a limiter circuit employed in a receiver supporting beamforming can prevent a reception circuit from being damaged. Further, when reception antenna gain is low or a high signal-to-noise ratio is required, a received signal is not allowed to pass through the limiter circuit so that the received signal can be prevented from deteriorating.

Abstract: An image display device 1 includes an image data conversion unit 10 that performs conversion processing of converting input image data D1 into driving image data D2 for each pixel, and a display unit 20 that displays a plurality of subframes based on the driving image data D2, in one frame period. In the conversion processing in the image data conversion unit 10, for each pixel, the hue and the saturation of the input image data D1 and the hue and the saturation of the driving image data D2 in an HSV color space are held to be respectively equal to each other. The image data conversion unit 10 computes a coefficient Ks used in the conversion processing, and performs the conversion processing using the coefficient Ks. The coefficient Ks varies depending on a brightness V and has a value causing a brightness after the conversion processing to increase as the brightness V becomes greater if the saturations S are equal to each other.

Abstract: An extraneous-matter detecting apparatus according to an embodiment includes a region setting unit, a computing unit, and a state setting unit. The region setting unit sets, for a captured image captured by an image capturing device provided in a vehicle, a plurality of divided regions. The computing unit computes a representative value of luminance in a target region for detecting an adhesion of an extraneous matter. The target region includes the plurality of divided regions. The state setting unit sets, based on a vehicle speed and the representative value of luminance in the target region, a transition state of information that indicates an adhesion state of an extraneous matter in the divided region.

Abstract: A control device includes a processor configured to grasp a status of a user around a display device and lower brightness of a display screen of the display device or reduce a change in brightness of the display screen per unit time in a case where the grasped status of the user is a specific status.

Abstract: Disclosed are a photographing method by a smart television and system thereof. The method includes acquiring a picture of an environment captured by a camera of the smart television, when the smart television is photographing; determining a brightness value of current environment of the smart television, based on the picture of the environment; when the brightness value of the environment is less than a preset value, gradually increasing screen brightness of the smart television and showing a preview image of the picture at different screen brightness; and after a required screen brightness is selected by the user according to the preview image of the picture, adjusting the screen brightness to the required screen brightness selected by the user, for the user to be photographed.

Abstract: A medical signal processing device for processing an image obtained by an imaging unit including a plurality of pixels, and generating a video signal for display, includes a Y gamma-correction unit that performs Y gamma-correction on a luminance signal for each pixel in the image obtained by the imaging unit.

Abstract: Techniques for detecting epileptic triggers in video content by storing a first sequence of frames of a video stream in a first buffer. The technique can further comprise generating a second sequence of subframes and storing the second sequence of subframes in a second buffer. The technique can further comprise generating average intensity values for the second sequence of subframes in the second buffer and calculating intensity changes between consecutive subframes in the second sequence of subframes based on the average intensity values. The technique can further comprise determining that a number of intensity changes between consecutive subframes in the second sequence of subframes exceeds an oscillation threshold and tagging the frames in the first buffer corresponding to the subframes in the second buffer as hazardous.

Abstract: A controller (100) for a quasi-resonant (QR) flyback converter (200) having a switching element (210) operable at a switching frequency (F) is presented.

Abstract: A method and device for adjusting a brightness of a display includes, determining current viewpoint brightness information of a current viewpoint region on the display corresponding to a user current viewed point or area of the display, determining previous brightness information of a previous viewpoint region of the display corresponding to a previously viewed point or area of the display, and controlling a displaying of a current image, including the current viewpoint region, with an adjusted brightness for a partial region of the display based on a comparison of the current viewpoint brightness information and the previous brightness information.

Abstract: To easily capture the light emission position of a light-emitting apparatus on the imaging apparatus side, even when the positional relationship of the two changes. A mobile device detects its own speed, and an LED within the mobile device accomplishes light emission in accordance with any out of a first light emission pattern, a second light emission pattern and a third light emission pattern so that the light emission cycle becomes shorter the faster the speed of the mobile device. On the other hand, a server detects the speed of the mobile device from frames obtained through imaging by an imager, and changes the imaging interval of the imager so that the imaging interval becomes longer the slower the speed.

Abstract: A method for testing energy efficiency of a display device having automatic brightness control (ABC) and local dimming functions includes the following steps: S1: executing an estimation program to obtain an estimation value of on-mode average power consumption of the display device; S2: when the estimation value is greater than or equal to a threshold value, adjusting a turn-on preset brightness value, first brightness adjustment ratios, and/or second brightness adjustment ratios to cause the estimation value to be less than the threshold value; and, S3: when the estimation value is less than the threshold value, actually measuring the display device to obtain a measurement value of the on-mode average power consumption of the display device.

Abstract: An image display apparatus (and a method for dimming a light source) includes a light source and display units that spatially modulate a light from the light source on the basis of an input video signal to form an image, and performs dimming control to adjust luminance of the light source in stages. The image display apparatus includes a light source dimming unit that determines whether to perform dimming control on the basis of the input video signal, acquires a dimming rate, which is a ratio of brightness of an input image to a maximum luminance output from the light source, and sets the output of the light source to the maximum luminance output when a dimming rate of a frame immediately before a frame determined not to be subjected to dimming control is lower than a threshold.

Abstract: According to an aspect, a display device includes an image display panel in which pixels are arranged; and a signal processing unit that converts input values of input signals including color information of a certain color represented in a reference color gamut into extended values in an extended color space to generate output signals. The signal processing unit corrects the input values of the input signals into input values of corrected input signals including color information of a corrected color so as to correct the certain color into the corrected color that is a color positioned in a direction away from a white point, determines an expansion coefficient, and obtains the output signals for first to fourth sub-pixels based on at least the corrected input signals and the expansion coefficient.

Abstract: Display an image by adjusting upper limit of brightness of the image projection light. Here, determine the target value, according to analysis result of the image data, for the detected brightness of the image projection light, and adjust the upper limit of brightness of the image projection light to cause the detected brightness to approach the target value.

Abstract: A portable vein projector, including an LED light source, a CMOS image sensor, a semi-transparent and semi-reflecting mirror, a micro-projector, and an image processing unit. The LED light source operates to project near-infrared light on the skin surface area. The near-infrared light is reflected by the skin surface, and part of reflected light penetrates through the semi-transparent and semi-reflecting mirror, enters into the CMOS image sensor to form an image in the CMOS image sensor. The image is transmitted from the CMOS image sensor to the image processing unit where the image is processed, and the image is transmitted to the micro-projector. The micro-projector outputs visible light. The visible light is reflected by the semi-transparent and semi-reflecting mirror and is imaged on the skin surface area to yield a vein image.

Abstract: A lighting device includes a light source and a control section. The control section has a first mode and a second mode as luminance setting modes of the light source and sets, in order to exercise variable control of a reach time taken to change luminance of the light source to a determined value, the reach time on the basis of the first mode for a determined period at the time of switching from the first mode to the second mode.

Abstract: A display device includes a display panel, a panel driving circuit, and a control circuit. The panel driving circuit receives image data and converts the image data into output driving voltages for the display panel. The image data include original red image data, original green image data, and original blue image data. When the display device enters an eye protection mode for protecting eyes of a user, the original blue image data is modified by the panel driving circuit to reduce the gray levels of the original blue image data.

Abstract: An apparatus and method for compensating for back light of an image are provided. The method includes receiving an image at a preset time interval, upon receiving the image, dividing pixels constituting the received image according to preset ranges, determining whether the received image is a back light image by confirming a distribution degree of pixels of each of the divided ranges, adjusting the brightness of the back light image when the received image is the back light image, and storing the received image and the back light compensated image.

Abstract: A light emission portion of a video signal is detected, and the display intensity of the light emission portion is enhanced for emphasis display. At this moment, the intensity stretch amount is controlled in accordance with a status of video black display, thereby increasing the feeling of brightness and hence improving the video quality. An area-active-control/luminance-stretching portion stretches and increases the intensity of a backlight portion on the basis of an index related to a brightness calculated, on the basis of a predetermined condition, from the input video signal, and lowers the video signal intensity of the non-light emission part excluding the light emission part. At this moment, the area-active-control/luminance-stretching portion changes, in accordance with a black display amount detected by a black detection portion, a control curve that defines the relationship between the index related to the brightness and the stretch amount.

Abstract: A display apparatus according to the present invention comprises: an acquisition unit that acquires, for each of division regions, brightness information; a decision unit that decides light emission brightness for each of the division regions; a light emitting unit; and a display panel, wherein the decision unit sets light emission brightness of a division region, in which a displayed image does not include a predetermined region, at light emission brightness according to brightness information of the division region, and sets light emission brightness of a division region, in which a displayed image includes the predetermined region, at light emission brightness lower than the light emission brightness according to brightness information of the division region.

Abstract: An image processing method, which performs color correction on a superimposed image obtained by superimposing a first image formed by a first image forming unit and a second image formed by a second image forming unit, includes controlling the dimming of the first image forming unit and the second image forming unit on the basis of dimming rates set in the first image forming unit and the second image forming unit in response to a given designated dimming rate, and performing a color correction process on image signals corresponding to the first image forming unit and the second image forming unit using a color correction value corresponding to the dimming rates of the first image forming unit and the second image forming unit.

Abstract: A method of dynamic of gamut control is provided for a display having a multi-spectral (typically multi-color) backlight, and sub-pixels corresponding to the different backlight spectra and at least one common sub-pixel. The display may f be an RGBW display having an RGB backlight. The method includes iteratively calculating the minimum required backlight intensities that will allow all (selected) color points of an image to be represented by the display. The determination for a light source of the backlight is based on determinations of intensities determined for other light sources in a previous iteration.

Abstract: A method for improving quality of low light video images including: receiving a current video frame; temporally enhancing it by applying a first weight matrix including higher weight factors for stationary regions and lower weight factors for moving regions to the received frame and a reference frame to generate an enhanced temporal video frame; spatially enhancing the enhanced temporal video frame by applying a second weight matrix including higher weight factors for stationary regions and lower weight factors for moving regions to generate an enhanced spatial video frame; and motion enhancing the enhanced temporal video frame by extracting matched rigid moving objects in a previous or future frame and processing each of the extracted matched rigid moving objects with a corresponding rigid object in the enhanced temporal or spatial or raw current video frame.

Abstract: High definition media content processing techniques are described in which enhanced media content rendering techniques may be performed to output high definition media content. In an implementation, luma keying may be provided to define clear pixels in a composite output using an optimum set of graphics processing instructions. In another implementation, techniques are described which may provide clear rectangles in a composite output of one or more video streams. Clear rectangles to appear in the composite output are configured by a media playback application. A texture is arrived at to represent a union of each of the clear rectangles and is applied to form the clear rectangles in the composite output. In another implementation, capture techniques are described in which an image to capture is resolved as strips to an intermediate texture and then from the texture to a capture buffer in system memory.

Abstract: HDMI is a digital audio and video communications protocol commonly used in consumer electronics. HDMI is particularly synonymous with high fidelity audio and video. Even though HDMI is a digital communications protocol, the audio quality can be impaired by analog signal impairments and distortions even if there are no digital decoding errors. In particular, the very process by which the audio is converted from Digital (HDMI) to human audible “Analog Audio” can be prone to errors. This occurs when the Digital to Analog Converter (DAC) clock, which is derived from the HDMI TMDS clock or HDMI source, is “distorted” due to its jitter, resulting in erroneous sampling or outputting of vital audio samples, thereby reducing the audio quality of the experience. The present invention reduces the jitter on the TMDS clock, and hence the audio DAC clock, resulting in lower audio distortion.

Abstract: The display device (1) which displays a video on a display section (7) includes a video processing circuit (2) and a backlight control circuit (3) for aperiodically changing at least any of a brightness and a contrast of the video, which is displayed on the display section (7), within a predetermined range during a predetermined time period.

Abstract: An AV device includes a communication component, a determination component, and a controller. The communication component is configured to receive a signal outputted from a source device. The determination component is configured to determine whether or not the signal received by the communication component includes an audio signal and a subtitle signal, and a video signal included in the signal received by the communication component has a moving picture. The controller is configured to control a brightness of a backlight to be low in response to determining that the signal received by the communication component does not include both the audio signal and the subtitle signal, and that the video signal has the moving picture.

Abstract: A video display device increases a feeling of brightness and expresses a video with high contrast by detecting a part of a video signal that emits light, enhancing the display luminance of the light-emitting part, and displaying the part. A light emission detection portion (1) uses a prescribed feature quantity related to the brightness of an input video signal, predetermines the light emission quantity for the video signal on the basis of the relationship with the feature quantity, and detects the light emission quantity for each input video signal frame from the feature quantity. A backlight luminance stretch portion (3) stretches the light source luminance of the backlight according to the light emission quantity detected. A video signal luminance stretch portion (6) stretches the video signal according to the light emission quantity or the luminance distribution of the input video signal.

Abstract: A television formed of a FIPEL panel that creates light in both front and rear directions. An emissive layer is used, where the layer emits colored pixels of light. The pixels are emitted in both front direction, to be viewed by a tv viewer, and in the rear direction as a backlight. The emitted light can also illuminate the bezel of the television.

Abstract: A video display control device includes a video signal processing section that corrects a video signal and outputs a video signal after correction to a display, and a backlight controlling section that controls a light emission amount of a backlight. A control data generating section allocates to a low gradation region of the video signal a high gradation region dynamic range of the video signal in which a video signal corresponding to a black band region is excluded. The backlight controlling section controls a light emission luminance of the backlight so as to cancel out an increase or a decrease in the mean luminance of the video displayed on a screen.

Abstract: Embodiments of the present invention comprise systems, methods and devices for display-mode-dependent adjustment of image code values.

Abstract: According to an aspect, a projector device includes an image projecting unit and a control unit. The image projecting unit projects an image. The control unit acquires brightness information of regions included in a projection surface on which the image projecting unit can project the image, and causes the image projecting unit to project, based on the brightness information of the regions, the image on a low-brightness region, among the regions, whose brightness is lower than that of another region.

Abstract: A method for detecting motion in video fields of video data, comprises the steps of: calculating texture information for a pixel in the video fields; determining a threshold value as a function of the calculated texture information; calculating a differential value for the pixel; and detecting motion in the video fields as a function of the determined threshold value and the calculated differential value.

Abstract: An adder adds, to a luminance value indicated by the image signal of the nth frame, a correction value corresponding to a combination of a luminance value indicated by the image signal of the nth frame and one indicated by the image signal of the (n+1)th frame. The adder outputs an image signal having the luminance value after addition as the image signal of the nth frame.

Abstract: Embodiments of the present invention comprise systems, methods and devices for increasing the perceived brightness of an image. In some embodiments this increase compensates for a decrease in display light source illumination.

Abstract: A projector includes: an image processing section adapted to perform image processing based on image information; a image projection section adapted to project an image based on an image signal output from the image processing section; a communication section adapted to connect to a network; and a control section adapted to transmit usage information including one of an image content of the image information and a projection environment for projecting the image to an information provision server via the communication section and the network, then receive operation setting information, which is prepared by the information provision server in accordance with the usage information, from the information provision server, and then adjust a projection operation, which is performed by the image processing section and the image projection section, based on the operation setting information.

Abstract: A measuring device for measuring a response speed of a display panel is provided. The measuring device includes a microcontroller and at least one photo sensor. The microcontroller provides a control command, according to which a display controller of the display panel provides test pattern to the display panel. The photo sensor senses a test frame displayed corresponding to the test pattern by the display panel, and provides a corresponding sensing signal associated with brightness and a response signal. According to the response signal, the response speed of the display panel is calculated.

Abstract: A method for providing a mapping from apparent color to actual color for an image capture device including capturing an image of a reference color chart having a plurality of color patches using the image capture device, wherein each color patch has an associated reference color, measuring the apparent color of the plurality of color patches in the captured image, selecting a plurality of control points representing different hue values within a circular hue space, determining an angular offset for each control point such that the distance between a transformed apparent color and the reference color for each color patch is minimized, the angular offset representing a hue correction, wherein interpolation of the angular offsets for the control points provides a mapping from apparent color to actual color for the image capture device.