Abstract: An automatic tracking camera system includes: a rotating unit for panning and tilting an image pickup unit including a lens apparatus and an image pickup apparatus; a tracking object detector; a motion vector detector for detecting a motion vector of the object to be tracked; a capture position setting unit for setting a capture position of the object to be tracked in the picked up image; and a controller for controlling drive of the rotating unit. The controller controls the rotating unit in a capture mode to capture the object to be tracked at the capture position based on the motion vector detected by the motion vector detector after the tracking object detector has detected the object to be tracked in the picked up image, and a maintenance mode to continuously capture the object to be tracked at the capture position after the capture mode.

Abstract: Real-time access by a requestor to surveillance video is conditionally pre-authorized dependent on the existence of at least one pre-specified automatically detectable condition, and recorded in a data processing system. A requestor subsequently requests real-time access to the surveillance video (e.g., as a result of an alarm), and if the pre-specified automatically detectable condition is met, access is automatically granted, i.e., without the need for manual intervention. An automatically detectable condition could, e.g., be an alarm condition detected by a sensor at the site of the video surveillance. Alternatively, it could be a locational proximity of the requestor to the site of the video surveillance. Alternatively, it could be a previously defined time interval.

Abstract: An object of the present invention is to obtain a display device having excellent display quality by appropriately modifying the chromaticity of images. In this display device, a correction processing part (CPU 30) determines a first chromaticity change amount stored in memory (31) on the basis of a first cumulative usage amount, which is the cumulative usage amount of an LED (17) up to a present time, the cumulative value having been measured by a counter (32), and the correction processing part also determines a second chromaticity change amount stored in the memory (31) on the basis of a second cumulative usage amount, which is the cumulative usage amount of the LED (17) up to a time when the chromaticity of a pixel is adjusted by a chromaticity adjusting part (CPU 30), the cumulative value having been measured by the counter (32).

Abstract: A video processing method and a device thereof are described. The method includes the steps as follows. An input video signal is received, in which a single period of the input video signal has a plurality of first input frames and a plurality of second input frames. The input video signal is processed, so as to generate an output video signal, in which a single period of the output video signal has a plurality of first output frames and a plurality of second output frames, and an amount of the first output frames is the same as an amount of the second output frames. A sum of the amount of the first output frames and the amount of second output frames is an integer multiple of a sum of an amount of the first input frames and an amount of the second input frames.

Abstract: A DDC interface circuit includes a first NMOS transistor and a second NMOS transistor. The gates of the first and the second NMOS transistors are all connected to a 3.3V system power via a first resistor. The source of the first NMOS transistor is connected to a DDC_CLK pin of a north bridge. The drain of the first NMOS transistor is connected to a 5V system power via a second resistor, and also connected to an SCL pin of a VGA interface via a third resistor to receive an ACK signal. The source of the second NMOS transistor is connected to a DDC_DATA pin of the north bridge. The drain of the second NMOS transistor is connected to the 5V system power via a fourth resistor, and also connected to an SDA pin of the VGA interface via a fifth resistor.

Abstract: The present invention aims at obtaining a high-quality video signal by reducing tone jumps. A second grayscale conversion characteristic is calculated from a video signal to which a first grayscale conversion process has been applied using a first grayscale conversion characteristic used to convert an M-bit video signal into an N-bit video signal, where M and N are integers and M is larger than N. The first grayscale conversion characteristic is corrected by using the second grayscale conversion characteristic. The first grayscale conversion process is applied to the video signal by using the corrected first grayscale conversion characteristic.

Abstract: There is provided a color killer circuit comprising a burst amplitude detection unit that detects an amplitude of a color burst; a delay unit that stores, delays, by a predetermined period of time, and outputs the detected amplitude; a subtractor that calculates a difference between an output from the burst amplitude detection unit and an output from the delay unit; a first comparator that compares the output from the burst amplitude detection unit with a first threshold value to determine whether or not the output from the burst amplitude detection unit is less than the first threshold value; and a second comparator that compares an output from the subtractor with a second threshold value to determine whether or not the output from the subtractor is greater than the second threshold value, wherein the color killer circuit masks the color component of the composite video signal when the first comparator determines that the output from the burst amplitude detection unit is less than the first threshold value,

Abstract: A video signal processing apparatus includes: an enhancement gain generating section obtaining an enhancement gain for each pixel based on an luminance signal forming part of an input video signal and a predetermined enhancement gain; and an enhancing section performing a process of enhancing the luminance signal forming part of the input video signal based on the enhancement gain. The enhancement gain generating section includes a mean deviation calculating portion obtaining a mean deviation of luminance values of pixels included in a predetermined region centered at a pixel of interest that is the pixel for which the enhancement gain is to be obtained, a weighting coefficient generating portion generating a weighting coefficient for the pixel of interest according to the value of the mean deviation, and a multiplication portion multiplying the predetermined enhancement gain by the weighting coefficient to obtain the enhancement gain for the pixel of interest.

Abstract: A method and apparatus for generating a color reference for an image to be printed for visualizing the same on a true-color monitor is disclosed. Lower-resolution image data are generated from high-resolution raster data for the image to be printed which are obtained from page description data for the image to be printed. The lower-resolution data are converted into display data which serve as color reference for the image to be printed and which can be visualized on a true-color monitor. An actual transmission characteristic is ascertained. The actual transmission characteristic ascertained is compared with a specified (desired) transmission characteristic, where, on the basis of this comparison, a correction curve is calculated which is required to arrive at the desired transmission characteristic starting with the actual transmission characteristic. The display data are ascertained using the calculated correction curve.

Abstract: A method for adjusting and limiting a color saturation level S of a color pixel of an input image includes steps of: obtaining a first chrominance value U and a second chrominance value V representing the color pixel of the input image; determining the color saturation level S in dependence on the first chrominance value U and the second chrominance value V; determining a saturation limiting parameter ? in dependence on the color saturation level S; obtaining an adjusted first chrominance value by multiplying the first chrominance value U by the saturation limiting parameter ?; obtaining an adjusted second chrominance value by multiplying the second chrominance value by the saturation limiting parameter ?; and representing a color pixel of an output image with the adjusted first and second chrominance values. The process is repeated for each pixel of each image of the input video signal.

Abstract: An ACC system includes a controllable amplifier having an input coupled to receive a chroma input signal and an output for providing an chroma output signal of controllable amplitude. A first feedback path, including a cascade connection of means for providing a signal representative of a measured burst amplitude, means for providing an error signal representative of the difference between a desired burst amplitude and the measured burst amplitude, and an integrator, is coupled between the output of the controllable amplifier and a gain control input of the controllable amplifier.

Abstract: A method of processing a digital color image comprising the steps of: providing a digital color image having pixels and a plurality of color channels; processing the image to provide a channel independent restored digital image; determining at least one predictor derived from the channel independent restored digital image or the digital color image; determining a channel interdependent color boost relationship from the at least one predictors; and applying the color boost relationship on a pixel by pixel basis to the respective channels of the digital color image to produce a processed digital color image.

Abstract: In a first signal suppressing process, in cases where a signal level of a certain color signal among color signals obtained from an image sensing operation is higher than a predetermined signal level, the certain color signal is suppressed. An image sensing operation with a comparatively large exposure quantity and an image sensing operation with a comparatively small exposure quantity are performed alternately. It is detected that suppression of a certain color signal is performed in the first signal suppressing process when the image sensing operation with a comparatively large exposure quantity is performed. A calculation is made to find composition ratios of the color signals, which are obtained from the image sensing operation with a comparatively small exposure quantity. A second signal suppressing process is performed for suppressing at least one color signal other than the certain color signal such that the composition ratios become identical with the calculated composition ratios.

Abstract: An ACC system includes a controllable amplifier having an input coupled to receive a chroma input signal and an output for providing an chroma output signal of controllable amplitude. A first feedback path, including a cascade connection of means for providing a signal representative of a measured burst amplitude, means for providing an error signal representative of the difference between a desired burst amplitude and the measured burst amplitude, and an integrator, is coupled between the output of the controllable amplifier and a gain control input of the controllable amplifier.

Abstract: A color video signal demodulating apparatus is provided. The apparatus includes a color subcarrier signal generator for generating a color subcarrier signal synchronously with a color burst, an abnormal burst detector for detecting an abnormal color burst included in a color video signal, such as a signal for the DVD, and a color subcarrier signal generation controller for controlling the color subcarrier signal generator such that no color subcarrier signal corresponding to the abnormal color burst is generated in response.

Abstract: In a method of obtaining a color correcting condition for a color image on an image frame, plural color component image signals are obtained for each pixel of the color image of the frame, and the frame is divided into plural blocks each of which is composed of plural pixels. A block color density value statistic is obtained for each block from the plural color component signals of the plural pixels of each block, wherein the statistic indicates a relationship between a density value and a number of pixels indicating the density value. A chroma level of each block is evaluated based on the block color density value statistic; a frame color density value statistic is obtained from the plural color component signals of the plural pixels of the plural blocks of the frame by reducing an influence of a block evaluated as a high chroma block; and the color correcting condition for the color image is determined based on the frame color density statistic.

Abstract: In a projection type image display apparatus, the screen is divided and a memory to record luminance correction data corresponding to the divided regions is provided, and addresses of the divided regions of the screen are set by an address counter, synchronized with the input video signal. The luminance correction data are read successively by inputting the addresses to the memory, and luminance nonuniformity on the screen is corrected through operational processing of the correction value converted in an analog value by a D/A converter and the input video signal. The luminance correction data is obtained by computing measurement results of respective luminance characteristics of red, green, and blue colors on the screen and separately recorded as an amplitude correction component and a DC level correction component.

Abstract: A chrominance signal processing apparatus for a digital television receiver, comprising an A/D converter for converting a transmitted analog composite video signal into a digital signal in response to a clock frequency, a luminance/chrominance separation circuit for separating luminance and chrominance signals from an output signal from the A/D converter, a delay circuit for delaying the separated luminance signal for a predetermined time period, an ACC circuit for controlling an amplitude of the separated chrominance signal, a chrominance demodulator for detecting color difference signals from an output signal from the ACC circuit, a color killer circuit for detecting a maximum amplitude value of a color burst signal from the separated chrominance signal to generate a color killer signal, a first multiplexing circuit for selecting one of the output signal from the A/D converter and an output signal from the delay circuit in response to the color killer signal, a second multiplexing circuit for selecting the

Abstract: A method of driving a liquid crystal display device for converting a composite video signal into RGB analog video signals by a chrominance circuit, and controlling the transmittance of each pixel corresponding to each color or red, green and blue on a liquid crystal panel based on the voltage levels of the RGB analog video signals so as to perform color display. The method includes the steps of detecting a color saturation of a picture based on the composite video signal, and controlling the transmittance of a liquid crystal panel based on the transmittance characteristic (T-V curve a) of each pixel relative to normal RGB analog video signals in the case that the color saturation is less than a predetermined value.

Abstract: A color corrector receiving a video signal as an input signal and producing an output signal representing a function of power of the input signal includes a logarithmic converter for achieving a logarithmic conversion of the input signal and outputting a resultant signal, a variable gain amplifier for altering amplitude of the signal from the logarithmic converter and outputting an obtained signal, and an antilogarithmic converter connected to the amplifier for outputting a signal representing an exponential function of the signal from the amplifier.

Abstract: The present invention relates to a picture adjusting method of a color television and its circuit for obtaining enhanced picture resolution by automatically adjusting the contrast, a brightness and sharpness of a picture in accordance with the ambient brightness, picture brightness, magnitude of RF signals and viewing distances of a remote controller from a television screen, utilizing either a set of fuzzy logic rules with fuzzy logic reasoning, or a look-up table having data corresponding to the detected ambient brightness, picture brightness, magnitude of the RF signals and the viewing distances of the remote controller from the television screen.

Abstract: A level detection circuit includes a multiplier and an adder for computing the sums of square values of a burst signal. A maximum value holding circuit holds a maximum value of the sums of the squared values of the burst signal. A counter counts sampling clocks. A multiplier, an adder and a 1/2 processing circuit compute a half value of the sum of two consecutive count values, and a delay circuit, a latch circuit and a comparator generate a first one of the two consecutive count values as a level of the burst signal when an output of the 1/2 processing circuit becomes larger than the output of the maximum value holding circuit. The invention enables level detection by finding a square value using a small circuit.

Abstract: A video cassette recording (VCR) playback system includes circuitry for separating the components of a video signal to produce luminance information and color-under information. The separated color-under information is applied to the input of a variable gain control amplifier the output signal from which includes burst information at color-under carrier frequency during burst intervals. The output signal from the variable gain amplifier is applied to a rectifying circuit which is enabled during the burst interval. The burst information at color-under carrier frequency is rectified during the burst interval and peak detected to produce a control voltage which is applied to the variable gain control amplifier for controlling its gain.

Abstract: An automatic color adjustment apparatus for use in an imaging device for adjusting the color of a subject such as skin or leave, which is well retained in human memory, to be as natural as possible. The color adjustment apparatus has a weighting coefficient setting device for setting a weighting coefficient according to the difference between the input chromaticity value and the preselected reference chromaticity value set by a chromaticity value setting device. The preselected reference chromaticity value is selected, with respect to a particular subject, such as skin, to be equal to the most natural color of that subject in a chromaticity plane defined by hue and saturation characteristics. The color-adjusted output signal is produced from a calculator which calculates an internal division operation applied to the preselected reference chromaticity value and the input chromaticity signal using the weighting coefficient.

Abstract: A circuit for regulating the color subcarrier amplitude in a video recorder used with a television receiver which employs overscanning of the electron beams for different modes of operation includes a regulating circuit for providing a regulating voltage representative of the amplitude of the color subcarrier. The regulating circuit includes a variable time constant circuit for switching from a short time constant during the overscanning to a long time constant immediately prior to ending the overscanning to change the regulating voltage in response to changes in the time constant. A variable amplifier is responsive to the regulating voltage to regulate the amplification of the color subcarrier in response to changes in the time constant.

Abstract: A system and method for automatically improving the picture quality of television or other video based images, based upon picture content, using improved rule based picture analysis and compensation techniques. The distribution of facial and non-facial tones in a television picture are determined and used to control of picture color quality using neural network techniques. A preferred embodiment of the invention adjusts the brightness, contrast and color saturation of a displayed picture based upon selected portions of the received picture signal. These controls are adjusted every 1/60th of a second (i.e. at the end of each field) to provide an improved visual display. Analysis of the video signal in one field of a frame provides the information for adjusting the picture quality of the subsequent field of that frame.