Abstract: There are provided an image capture apparatus which can implement good tone gradation at various shooting sensitivities without preparing a nonlinear conversion characteristic for each shooting sensitivity, and a method of controlling the apparatus. If the shooting sensitivity is less than the standard sensitivity, nonlinear conversion processing is performed by linearly converting the range of signal levels obtained by shooting operation with an image sensor sensitivity corresponding to the standard sensitivity such that the maximum value decreases with a decrease in shooting sensitivity.

Abstract: A solid-state imaging device includes a pixel array section and a signal processing section. The pixel array section is configured to include a plurality of arranged rectangular pixels, each of which has different sizes in the vertical and horizontal directions, and a plurality of adjacent ones of which are combined to form a square pixel having the same size in the vertical and horizontal directions. The signal processing section is configured to perform a process of outputting, as a single signal, a plurality of signals read out from the combined plurality of rectangular pixels.

Abstract: The digital camera includes: a storage unit that stores a plurality of images captured by an image sensor when a multiple exposure photographic mode is set; a gain impartation unit that imparts, to the plurality of captured images, gains based upon the number of shots of multiple exposure photography and determined so that their sum equals unity; and a combination unit that creates a multiple exposure photographic image by combining the plurality of images, after the gains have been imparted by the gain impartation unit.

Abstract: A photographing apparatus and an image pickup device thereof include an image pickup device of which an image pickup area includes a plurality of pixels and is divided into a plurality of sub-image pickup areas, and at least one pixel included in each of the sub-image pickup areas outputs image signals at a same time.

Abstract: An image correcting apparatus and method are disclosed to correct a smear vertical line on an image captured by a camera. The method for correcting an image comprising: detecting image data corresponding to a vertical line of a specific image and having hue values greater than a hue reference value; and correcting the detected image data.

Abstract: A photographing apparatus includes a lens array and a photoelectric conversion unit. The lens array includes a plurality of lenses that are regularly arranged on a single plane. The photoelectric conversion unit includes a plurality of photoelectric conversion areas, each including a plurality of pixels. The plurality of photoelectric conversion areas are installed on a single plane. Each photoelectric conversion area corresponds to an irradiation range of light passing through a respective one of the plurality of lenses of the lens array. The photoelectric conversion unit includes a first mode and at least one second mode. In the first mode, data is continuously read out from all pixels included in the plurality of photoelectric conversion areas. In the at least one second mode, a subset of fewer than all pixels of each of the plurality of photoelectric conversion areas are selected and used to generate a color image.

Abstract: An interface for receiving data from an image sensor having an imaging array and a clock generator and for transferring the data to a processor system is described. The interface comprises a memory for storing the imaging array data and the clocking signals at a rate determined by the clocking signals. In response to the quantity of data in the memory, a signal generator generates a signal for transmission to the processor system and a circuit controls the transfer of the data from the memory at a rate determined by the processor system. The memory may be a first-in first-out (FIFO) buffer or an addressable memory. The interface is preferably integrated on the same die as the image sensor. The signal generator may generate either an interrupt signal for transmission to the processor system or a bus request signal for transmission to a bus arbitration unit for the processor system.

Abstract: An imaging apparatus is equipped with: imaging means constituted by a great number of first light receiving elements and second light receiving elements that photoelectrically convert light from subjects, which are capable of being controlled to be driven independently form each other and are arranged in a predetermined arrangement, for obtaining image signals based on the output of the first light receiving elements and/or the second light receiving elements; image signal processing means, for generating image data from the image signals obtained by the imaging means; subject discriminating means, for discriminating subject scenes based on the image signals; subject field data obtaining means, for obtaining subject field data based on the image signals; and control means, for selecting a drive mode to drive the imaging means and the image signal processing means, based on the discriminated subject scenes and the obtained subject field data.

Abstract: The present invention is a method and apparatus for increasing the effective contrast ratio and brightness yields for digital light valve image projectors using a variable luminance control mechanism (VLCM), associated with the projector optics, for modifying the light output and provide a correction thereto; and an adaptive luminance control module (ALCM) for receiving signals from the video input board, the adaptive luminance control module producing a signal on a VLCM bus connecting the variable luminance control mechanism and the adaptive luminance control module, the signal causing the variable luminance control mechanism to change the luminance of the light output and provide a corrected video signal for the projector.

Abstract: A method and a circuit for controlling a dynamic image sensor defining, for each image, several successive time intervals of exposure of photodiode cells, starting from successive decreasing reset levels, wherein the time intervals of exposure of the image respect a homogeneous distribution of the amount of cells in ranges of brightness levels.

Abstract: An imaging device includes a photographing device configured to photograph an object and generate an image signal, a gain storage register configured to store a gain determined for the photographing device, a gain adjustment unit configured to adjust the image signal using the gain, and a noise reduction unit configured to reduce noise of the image signal using a noise filter selected based on the gain.

Abstract: In a method and apparatus for difference measurement of an image, the image is detected by an image sensor array having (N×N) sensor elements, wherein N=2n, n?2, and n being an integer number, each detected sample value is read as a positive or as a negative sample value according to a sign control pattern from a pattern control unit, and measurement values are generated for measurement template blocks of the image sensor array by a computing unit which computes for each measurement template block a weighted sum of the read sample values of the respective measurement template sensor elements depending on a predetermined measurement template. A measurement template block is, provided for at least four adjacent sensor elements of the image sensor array. The method/apparatus can be used in any kind of digital camera and allows for a fast generation of image data with a hardware implementation of low complexity.

Abstract: A plurality of image signals having different exposure levels is acquired; low-frequency components are extracted from each of the image signals to generate a plurality of low-frequency image signals; and the plurality of low-frequency image signals are combined to generate a combined low-frequency image signal. A first image signal is extracted from the plurality of image signals; and high-frequency components are extracted from the first image signal to generate a high-frequency image signal. Then, a combined image signal is generated by combining the combined low-frequency image signal and the high-frequency image signal.

Abstract: A solid-state imaging apparatus that shortens a time for reading out pixel signals of all pixels and improves the aperture ratio of pixels is provided. The solid-state imaging apparatus includes a plurality of pixels (3) arranged in a matrix along a plurality of rows and columns, in which each of the pixels includes a photoelectric conversion element and a color filter; a plurality of buffers (2) arranged with each one corresponding to a plurality of pixels; and a plurality of vertical output lines (1) arranged such that two or more of the vertical output lines (1) are arranged correspondingly to one of the columns of the pixels; in which an input node of each of the buffers is connected commonly to a plurality of pixels having color filters of different colors, and output nodes of the plurality of buffers are connected alternately to a plurality of vertical output lines.

Abstract: An image pickup apparatus that makes it possible to achieve both high picture quality and a wide dynamic range is provided. Each pixel unit included in the image pickup apparatus includes: four photodiodes; four transfer transistors; a charge storage portion (four floating diffusions) for storing electric charges generated at the photodiodes; an amplification transistor; a select transistor; and a reset transistor. The image pickup apparatus further includes multiple coupling transistors. Each coupling transistor couples together the charge storage portions of two pixel units of the pixel units. A scanning circuit switches on or off the coupling transistors according to read mode.

Abstract: On embodiment of the present invention sets forth a technique for automatically computing exposure parameters for a digital video camera (DVC) system. The exposure parameters include exposure gain, analog gain, and digital gain. Each frame is analyzed with respect to an image luma value. Exposure gain and analog gain are adjusted to reduce differences between a target image luma value and measured image luma values over sequential frames. Digital gain is adjusted with respect to each frame to reduce visually abrupt changes in sequentially captured video frames.

Abstract: At least one exemplary embodiment is directed to an imaging apparatus including an image sensor including a light-shielded pixel area, a comparison unit configured to compare a light-shielded pixel output value output from at least a part of the light-shielded pixel area with a plurality of preset determination values, a counting unit configured to count a result of comparison performed by the comparison unit with respect to each of the plurality of determination values, and a calculation unit configured to estimate an amount of dark current generated in the image sensor based on a result of counting performed by the counting unit.

Abstract: A solid-state imaging device of one embodiment includes a light receiving section including of a plurality of pixels 11 having respective photodiodes, the pixels being two-dimensionally arrayed in M rows and N columns; N readout lines disposed for the respective columns and connected with the photodiodes PD included in the pixels of a respective columns via readout switches; a signal output section for outputting a voltage value according to an amount of charge input through each of the readout lines; and a vertical shift register for controlling an opening and closing operation of the readout switch for each of the rows. A contour between one side along a row direction of the light receiving section and a pair of sides along a column direction has a stepped shape. A dummy photodiode region is formed along the stepped contour of the light receiving section.

Abstract: The object of the present invention is to provide an imaging and display apparatus and method for providing small and reasonable apparatus while the imaging frame rate of the imaging element can be high without decreasing the resolution of the display image. For this object, an imaging and display apparatus comprises an imaging element 12 for performing photo electric conversion on an optical image formed by an optical system 11, a display element 20 for displaying image information, a readout control section 14 for sequentially reading out the image information from the imaging element 12, and a image selection section 17 for selecting image information to be displayed on the display element 20 from the image information sequentially read out of the imaging element 12 by the readout control section 14.

Abstract: A closed circuit television (CCTV) camera includes an image pickup unit to receive an image based on an object, convert the image to an electric signal, and output the electric signal, and a controller to adjust a photographing time or a photographing mode of the CCTV camera based on information of the object derived from the electric signal and pre-set condition information.

Abstract: An imaging apparatus includes: a pixel signal read out unit for reading out a pixel signal and a reference signal, and for holding the read out pixel signal or the reference signal in a holding capacitor; a selection switch for successively selecting signals stored row by row in the holding capacitor of pixel signal read out unit, and for outputting the selected signal to any one of a plurality of signal lines; reset switches for resetting the plurality of signal lines to a reset voltage; a multiplexer for selectively outputting the signals of the signal lines; and a control unit for controlling the multiplexer and the selection switch. The control unit performs control based on the reference signal read out according to a period longer than a period according to which the pixel signal is read out.

Abstract: A method for real-time adjusting image capture frequency by an image detection apparatus comprises: sensing the frames consecutively by an image detection unit; setting a value for a counting variable; selecting a testing frame from the frames and comparing an image displacement between the testing frame and a previous frame thereof, to obtain a motion reference signal by a processing unit; providing a plurality of adjustable values for a capturing frequency variable by a memory unit and corresponding either one of the capturing frequency variable values to the motion reference signal; comparing the value of the counting variable to that of the capturing frequency variable by the processing unit; capturing and recording the testing frame as a sampling frame while the counting variable value reaches that of the capturing frequency variable; comparing an image displacement between the sampling frame and a previous frame thereof, to obtain an ultimate motion speed.

Abstract: An image playback method that performs a sequential display of a plurality of image data including a moving image stored in a memory unit while each being switched at predetermined time intervals, includes converting a format of moving image data for the sequential display into a predetermined format for the sequential display prior to the sequential display.

Abstract: An image processing system is disclosed which uses gain information from an input image to determine a threshold value used to filter the input image. The gain information is indicative of the amount of illumination of the input image and thus the noise level. The image processing system includes an image processor, a converter and a filter. The image processor receives and processes first image information into second image information and extracts the gain information from the first image information. The converter converts the gain information into a filter threshold, which is used by the filter to filter the second image information to provide filtered image information. The converter may include a lookup table storing noise characteristic estimates or the threshold values. The threshold values may further be based on subband size. The filter may be a wavelet-based transform denoising filter.

Abstract: An image sensing apparatus includes an image sensor including a plurality of pixels, a control unit that, during an exposure operation that generates an image in the image sensor, reads out signals of a first portion of pixels among an entire frame of pixels from the image sensor, outputs an image based on the signals of the first portion of pixels to a display unit, and, when the exposure operation is completed, reads out signals of the entire frame of pixels from the image sensor, and an image processing unit that generates an image by adding the signals of the first portion of pixels to signals of the entire frame of pixels for corresponding pixels.

Abstract: An image capturing apparatus including an image capturing unit configured to capture an image, and a generation unit configured to generate an exposure period map by assigning, to each of the plurality of image sensor pixels, exposure control information to control a charge accumulation time, based on preliminary captured image data obtained by preliminary image capturing using the image capturing unit. The exposure control information includes first exposure control information corresponding to a first accumulation time and second exposure control information corresponding to an accumulation time longer than the first exposure control information A correction unit expands a first region having the first exposure control information on the exposure period map, and a control unit controls the accumulation time for each of the plurality of image sensor pixels in accordance with the exposure period map corrected by the correction unit.

Abstract: An image processing system for interpolating image data is comprised of a shift invariant point determining device, an illumination averager, a second order differentiator, and color data calculator. The shift invariant point determining device ascertains shift invariant points within the mosaic color element array pattern. The illumination averager determines average illumination values of clusters of a plurality of pixels. The second order differentiator determines a second order derivative of the average illumination values of the clusters of the plurality of pixels. The color data calculator determines color data for each of the plurality of pixels from the image data and second order derivative. A second order derivative scaler multiplies the second order derivative by a scaling factor for selectively smoothing and sharpening the second order derivative. A color data averager averages color data values of adjacent pixels to a resolution of the image data.

Abstract: A method for adjusting photosensitiveness is able to determine a relative distance of an object in an image capture area through images captured before and after pre-flash of a flash lamp, so that the relative distance serves as a reference for adjusting current photosensitiveness of the digital camera, thereby capturing an image having better quality in a status that the flash lamp provides a fill light.

Abstract: An imaging system includes a plurality of pixels. A pixel readout circuit produces a plurality of first image frames from those pixels. An image output circuit produces a plurality of second image frames and operates to produce a second image frame from more than one of the first image frames. The pixel readout circuit is enabled to produce the first images frames at a rate faster than the image output circuit produces the second image frames. Through combining first image frames, by averaging or other statistical combinations, the photon shot noise of second image frames is reduced. Photon shot noise affects images with high light levels more than those with low light levels and, as such, the system processing alters the rate of first image frames dependent on the current light levels.

Abstract: A plurality of photography operations are performed with respect to a single subject with different photography conditions, to obtain a plurality of image data sets. The obtained image data are processed to obtain a single dynamic range expanded image data set. A photography method is selected from among: a first method, in which photography is performed at least twice at different exposures; a second method, in which photography is performed with an underexposure at a step number based on a set dynamic range; and a third method, in which photography is performed at least twice with different underexposures at step numbers based on a set dynamic range, based on whether photography operations are possible at exposure ratios corresponding to the expansion ratio of the dynamic range and whether flash is emitted. Photography is performed according to the selected method, thereby preventing limitations of dynamic range due to hardware specifications.

Abstract: Systems and methods (“utility”) for encoding digital linear image data into encoded image data. The utility may be included as part of a digital image capture device, such as a digital camera or a film scanner. The utility may include an encoder module that is operative to encode digital linear image data into encoded data according to an enhanced transfer function. The transfer function includes a linear portion and a logarithmic portion separated by a breakpoint. The transfer function may be continuous and continuously differentiable at the breakpoint. Further, the transfer function may operate to reduce the bit depth of the image data (e.g., from 12 bits to 10 bits, or the like) to provide compression for the image data.

Abstract: Methods, systems, and products are disclosed for email management and rendering, including receiving aggregated email in native form, synthesizing the aggregated native form email into synthesized email, and presenting the synthesized email. Synthesizing the aggregated native form email into a synthesized email may also include translating aspects of the native form email into text and markup. Synthesizing the aggregated native form email into a synthesized email may also include identifying attachments to the aggregated native form email and translating aspects of the attachments into text and markup. Presenting the synthesized email also includes identifying a presentation action in dependence upon presentation rules and executing the presentation action.

Abstract: This invention is an image pickup device that realizes a wide dynamic range while minimizing circuit area using a pixel array that can pick up a low-sensitivity image and a high-sensitivity image. This invention obtains information (S1/S2) needed for generating a correction coefficient using one more than the number of pixels readout circuits (RC1 to RCn+1). This significantly reduces the circuit area compared with the case of using twice as many readout circuits as pixels for generating the correction coefficient.

Abstract: A comparator includes: a signal input terminal; a capacitor connected between the signal input terminal and a signal line; and a switching transistor for calibration which is turned on/off to periodically charge the capacitor with a voltage difference between a signal voltage and an operating point of the comparator, wherein an on-resistance of the switching transistor which is turned on when performing the charging is dynamically controlled by a control pulse having a limited amplitude.

Abstract: An imaging device includes an imaging sensor, a switching section, and a controlling section. The imaging sensor includes a light receiving surface to which light receiving elements capable of addressing reading are arranged, and having, on the light receiving surface, an imaging area capturing a subject image and an optical black area outputting a signal of a dark current component, the optical black area which the light receiving elements are covered with a light shielding member. The switching section switching a first state and a second state. The controlling section reads a signal level by each partial area at the optical black area when a dark image is captured in the second state after capturing a normal image in the first state, sequentially compares with the signal level at a corresponding position of the normal image, and controls a exposure time of the dark image according to the comparison result.

Abstract: Pixels are two-dimensionally arranged into rows and columns in an image sensing region of a solid-state image sensing device, and divided into a plurality of vertical blocks. A vertical signal line is connected to each pixel column. A voltage read out from a pixel is A/D-converted and held in a holding circuit. A vertical block selection circuit outputs a vertical block selection signal in response to a horizontal sync pulse. An intra-block line selection circuit selects one pixel row in one block or simultaneously selects a plurality of pixel rows in one block, in accordance with the selection signal and a signal for setting the number of lines to be selected. A pulse selector circuit supplies a pixel driving pulse signal to a pixel row selected by the intra-block line selection circuit.

Abstract: An imaging sensor having reduced column fixed pattern noise includes a plurality of imaging pixels and a column sampling circuit. The plurality of imaging pixels are arranged in a column the column sampling circuit is coupled to the column. A plurality of sampling channels are included in the column sampling circuit, where the column sampling circuit randomly selects a first sampling channel from among the plurality of sampling channels to sample a first data signal from a pixel included in the plurality of imaging pixels and where the column sampling circuit randomly selects a second sampling channel from among the plurality of sampling channels to sample a second data signal from the pixel.

Abstract: An SSG circuit section is composed of: a memory storing correction information for correcting a transmission characteristic of an image pickup signal in a transmission path; a readout circuit for reading out the correction information stored in the memory; and an SSG for generating a drive signal to be outputted from a driving circuit and a sampling pulse to be used in a CDS circuit, and for specifying an amplification factor of an amplifier circuit.

Abstract: An image sensor having an output of an integral image is provided. The image sensor includes a pixel circuit, a line accumulator, and a volume accumulator. The pixel circuit includes a plurality of pixels for capturing pixel values of the pixels. The line accumulator is used for accumulating the pixel values of the pixels from a first pixel to a target pixel in a target pixel line of the image so as to obtain an accumulated line pixel value. The volume accumulator is used for adding the accumulated line pixel value output by the line accumulator to an integral pixel value of the pixel corresponding to the target pixel in a previous pixel line of the target pixel line, and using an adding result as the integral pixel value of the target pixel, so as to output the integral pixel value of the target pixel to form an integral image.

Abstract: Imaging signal obtained through exposure for divided exposure times is A/D converted to digital imaging signal. Dark current component is subtracted from the digital imaging signal. The result of subtraction is accumulated and stored in a first memory. Next, exposure for divided exposure times is performed with the imaging device shielded from light. The obtained imaging signal is A/D converted to digital imaging signal. Dark current component is subtracted from the digital imaging signal. The result of subtraction is accumulated and stored sequentially in a second memory. The digital imaging signal stored in the second memory is subtracted from the digital imaging signal stored in the first memory. Then the result of subtraction is output. The word length allocated to one pixel in the first and second memories is longer than the word length of one A/D converted pixel.

Abstract: In a solid-state image pickup apparatus 100 of the invention, a transparent member 4 that covers a light receiving section of a solid-state image sensing device 2 is located within an opening 10 of a wiring board 1. The solid-state image sensing device 2 is adhered to the backside of the wiring board 1 via a conductive member 5 and also sealed to the backside of the wiring board 1 with an encapsulation resin 6 formed around the solid-state image sensing device 2. Furthermore, a through-hole 11 passing through the wiring board 1 in a thickness direction is formed on outside of the opening 10 of the wiring board 1, and the through-hole 11 is filled with the encapsulation resin 6. This configuration provides the solid-state image pickup apparatus 100 in which the encapsulation resin 6 can be easily injected to the surrounding area of the solid-state image sensing device 2.

Abstract: In one embodiment of the invention, there is provided a method of correcting a captured image for lens shading artifacts, the captured image being captured by an image capture system, the method comprising: determining a function L(x, y) being a lens shading correction function to be applied to images captured by a lens of the image capture system in order to correct for lens shading artifacts; if a focal length associated with the captured image is less than a focal length associated with, the function L(x, y) then cropping the function L(x, y) based on the focal length associated with the captured image; and scaling the cropped function L(x, y) to a size of the tin-cropped Junction L(x, y).

Abstract: Provided are a digital image processing apparatus capable of photographing an image of which an ISO sensitivity-to-noise ratio is improved by adjusting a size of the image to be photographed in low light conditions, and a method of controlling the digital image processing apparatus. The method includes the operations of receiving an input image; measuring input brightness of the input image; determining whether the input brightness is lower than an appropriate brightness; and generating an intermediate image by reducing a size of the input image by using an add mode for each pixel if the input brightness is lower than the appropriate brightness.

Abstract: A solid-state image pickup device includes a pixel unit configured to convert light into an electrical signal; a substrate having a first side on which the pixel unit is formed and a second side opposite the first side; an optical communication unit disposed on the first side of the substrate, and configured to convert a signal read out from the pixel unit into an optical signal and output the optical signal; and a cooling unit disposed on the second side of the substrate and below at least a forming area of the optical communication unit, the forming area being an area where the optical communication unit is formed, and configured to cool or dissipate heat generated in the optical communication unit and transferred through the substrate.

Abstract: An image capture device according to the present invention includes: an optical system for producing a subject's image; an imager with multiple photodiodes, which reads an electrical signal representing the intensity of light that has been incident on each photodiode from the photodiode, thereby generating an image signal representing the subject's image; a controller, which acquires sensitivity information by photometry in order to adjust the sensitivity of the imager to light and which selects one of multiple methods for reading the electrical signal from each photodiode according to the sensitivity information acquired; and a driver for driving the imager by the reading method selected. The multiple reading methods include a mixing reading method, by which the electrical signals supplied from the photodiodes are added together and then output.

Abstract: An amplification-type solid-state image capturing apparatus according to the present invention, having a plurality of pixel sections each including a photoelectric conversion element for receiving light of a subject and performing a photoelectric conversion on the light of the subject and a transfer section capable of transferring signal charge from the photoelectric conversion element to a charge detection section, the plurality of pixel sections connected to each charge detection section, and the amplification-type solid-state image capturing apparatus amplifying and reading potential at the charge detection section as signal data for each of the pixel sections, includes: when one of the plurality of pixel sections which share the charge detection section performs an original shutter operation, a shutter control section for performing an additional shutter operation on the remaining pixel sections which share the charge detection section with the one pixel section and have not performed the original shutter

Abstract: Method, system, and computer program product example embodiments of the invention are disclosed to provide multi-network secure video teleconferencing (VTC) for VTC endpoints. The embodiments of the invention provide distributed components to perform the necessary operations, rather than co-locating the components in the VTC endpoint. Some system components are located with the VTC endpoint, other components are placed in a network operations center (NOC) and still other components are distributed on the various networks.

Abstract: The present invention discloses structure of a two-gate field effect transistor (FET), named as charge gated FET, and presents various active pixel sensor (APS) and multimode architectures using the device which has only one, or two on-pixel transistors for high resolution, high gain and fast frame rate APS arrays. It is also disclosed a new method of addressing pixels of an APS array by applying the addressing voltage pulse directly to the gate of the amplifying transistor of the pixel architecture, eliminating the row select transistor from the pixel circuit.

Abstract: An imaging device includes an imaging sensor, a switching section, and a controlling section. The imaging sensor includes a light receiving surface to which light receiving elements capable of addressing reading are arranged, and having, on the light receiving surface, an imaging area capturing a subject image and an optical black area outputting a signal of a dark current component, the optical black area which the light receiving elements are covered with a light shielding member. The switching section switching a first state and a second state. The controlling section reads a signal level by each partial area at the optical black area when a dark image is captured in the second state after capturing a normal image in the first state, sequentially compares with the signal level at a corresponding position of the normal image, and controls a exposure time of the dark image according to the comparison result.

Abstract: A moving image processing apparatus, includes a low-speed clock generation source to generate a low-speed clock signal of a first frequency, a high-speed clock generation source to generate a high-speed clock signal of a second frequency which is higher than the first frequency, an image data source to output progressive-type image data, a PI converter to convert the progressive-type image data output from the image data source into interlaced-type image data forming a field and to output the interlaced-type image data, and an arithmetic part to process the interlaced-type image output from the PI converter by use of only one of a pair of fields each formed by the interlaced-type image output from the PI converter. The high-speed clock generation source supplies the high-speed clock signal to the image data source and the PI converter, and the low-speed clock generation source supplies the low-speed clock signal to the arithmetic part.