31results about "Color signal processing circuits" patented technology

A method including presenting a video sequence on a display where the video sequence includes video frames, calculating a quality indicator with respect to the video frames and automatically indicating which video frames meet or exceed a predetermined image quality threshold depending on the quality indicator.

This invention has as its object to eliminate sensitivity nonuniformity on the plane of an image sensing element irrespective of exchange of a lens. To achieve this object, in an image sensing apparatus which has an image sensing element and can exchange a lens, a memory stores shading correction coefficients respectively corresponding to pixels in a two-dimensional matrix on the plane of the image sensing element, and a correction device makes a correction calculation of pixel data read out from each pixel of the image sensing element by extracting the shading correction coefficient associated with the corresponding pixel from those stored in the memory.

The invention relates to the technical field of mobile terminal, in particular to a picture processing method and device. The picture processing method includes that acquiring the current environment information of mobile equipment of a camera, wherein the current environment information comprises current weather information, current time information and current light information; determining the current color temperature parameter of the mobile equipment according to the acquired current environment information, and using the current color temperature parameter to process a picture. The picture processing method is capable of improving the picture processing efficiency and improving the picture quality.

An image sensor has an imaging surface irradiated with an optical image of an object scene, and repeatedly generates an object scene image. A CPU repeatedly determines whether or not a specific variation exceeding a reference is generated in the object scene captured by the image sensor, in parallel with a generating process of the object scene image by the image sensor. When a determination result is updated from a negative result to an affirmative result, the CPU waits for an elapse of a designated period, then, determines presence or absence of a generation of a flicker, and executes a flicker countermeasure process, as needed.

A video controller and method for performing tone-mapping of high-dynamic-range (HDR) video are provided. The video controller includes: a color-space converter, arranged to receive an input high-dynamic-range (HDR) video signal and perform a color space conversion on the input HDR video signal to obtain a first video signal having a first gamma curve; a de-gamma unit, arranged to apply a second gamma curve on the first video signal to compensate the first gamma curve to obtain a second video signal; a first histogram calculator, arranged to calculate a first histogram of a current frame of the second video signal; and a tone-mapping unit, arranged to apply a tone-mapping curve on the current frame of the second video signal according to a histogram of a previous frame of the second video signal to generate an output video signal.

A signal processing circuit includes: multiple digital-signal processing units operating in parallel each including a selecting unit for selecting one of multiple systems of input picture signals, a double-speed converting unit for writing the data equivalent to one field of the picture signal selected by the selecting unit in field memory, and simultaneously reading the data equivalent to one field from the field memory twice at double speed, thereby converting the frequency of the picture signal into double speed, a reading unit for reading the picture signal converted into double speed by the double-speed converting unit and temporarily stored in line memory, and a correction processing unit for subjecting the picture signal read by the reading unit to predetermined correction processing; and a control unit for performing the selection control of the multiple systems of picture signals, and the read position control of a picture signal from the line memory.

A solid-state image pickup device includes a pixel array including a plurality of pixels, each having a photoelectric converter; a signal conversion circuit converting a pixel signal from the pixel array into an output signal; and a clamp correction circuit correcting a clamp level included in a predetermined signal dealt with by the signal conversion circuit. The clamp correction circuit includes an analog-to-digital converter performing analog-to-digital conversion of the predetermined signal and generating and outputting N+M bits of digital data at the time of analog-to-digital conversion, N+M bits being obtained by adding M bits for correction to N bits assigned to the predetermined signal; a correction-value generating unit determining a correction value based on the N+M bits of digital data and a target value; and a computing unit performing a correction computation using the N+M bits of digital data and the correction value to generate N bits of clamp-corrected data.

A method of recording audio enabling software and images on a removable storage medium including providing a plurality of digital files representing colored digital images, transferring such digital files onto the removable storage medium, and providing audio enabling software and transferring such software onto the removable storage medium.

A “composite signal generator” automatically combines two or more copies of a signal to produce a composite that is better than the individual copies. For example, given two or more input images of a scene captured from approximately the same viewpoint, the composite signal generator automatically produces a composite image having reduced or eliminated areas of occlusion with respect to any occlusions existing in the input images. First, the input images are registered using conventional image registration techniques. Differences between the registered images are then used to identify regions of potential occlusion in one or more of the images. A determination of which image is actually occluded is made by identifying which image has a larger discontinuity along a border of the potentially occluded regions. A composite image is then created by choosing one image and mosaicing parts from the other images where it is occluded and they are not.

A projection type image display device includes a plurality of image display elements that perform modulation of light rays in accordance with an image signal, a color synthesizing optical element for synthesizing light rays having mutually different wavelength ranges that have been modulated by these image display elements by use of a dichroic membrane, lens groups having a positive refractive power as a whole that are disposed between the image display element and the color synthesizing optical element, and a projection optical system for projecting an image synthesized by the color synthesizing optical element. The projection type image display device further includes a storage circuit for storing data used to correct the brightness irregularity of a projected image, and a brightness irregularity correcting circuit for correcting brightness irregularity of a projected image on the basis of the data stored in the storage circuit.

The invention provides an image processing device and a method thereof. The device comprises an effective bit detector and a compensator. The effective bit detector is used for detecting effective number of bits in bit depth of image input signals so that a correction coefficient can be correspondingly outputted. The compensator is coupled with the effective bit detector to receive the correction coefficient and perform bit number compensation on the image input signals according to the correction coefficient so that corresponding image output signals can be outputted.

An image-capturing device having an image identification mechanism is provided. The image-capturing device comprises a first and a second flashlight modules, a processing module and an image-capturing module. The first and the second flashlight modules generate a first and a second color lights respectively according to a first and a second currents. The processing module controls the first and the second flashlight modules to flash light at an object sequentially within a time interval. The image-capturing module generates a first frame according to the object and the first color light and generates a second frame according to the object and the second color light. The processing module subtracts the pixels in the first and the second frames to retrieve a foreground area. A color difference between the first and the second frames for each the pixels in the foreground area is larger than a threshold value.

An image correction apparatus reduces an input image, for each area, at a reduction ratio corresponding to the area, generates a reduced luminance image, and extracts a low-frequency component image from the reduced luminance image. The image correction apparatus enlarges the extracted low-frequency component image, for each area, at an enlargement ratio corresponding to the area, generates correction data according to a size of the input image, and corrects the input image according to the correction data.

A method for estimating a fly screen effect of an image capture unit is described, having a plurality of image sensors for providing an item of light intensity information. The method includes a step of determining an image property of an item of image information, based on a plurality of items of light intensity information and on a plurality of parameters, each of the plurality of parameters being associated with each of the plurality of image sensors. This method also includes a step of ascertaining a plurality of parameter values for the plurality of parameters, in which the image property is at least made to approximate an ideal image property, the plurality of parameters representing the fly screen effect in a model of the image capture unit.

The invention provides a color shading correction method and device capable of accurately correcting color shading of an image. The method comprises: a first image is received; a hue value of a firstpixel point in the first image in which a gradient is lower than or equivalent to a threshold is extracted; a transformation coefficient of the first pixel point is determined by using the hue value of the first pixel point and a feature contour of the first pixel, the feature contour is used for representing a feature of a color shading contour of a pixel point in the image that is obtained by statistically analyzing multiple standard light sources, and the transformation coefficient is used for representing the degree of strength of the feature contour; a color shading contour of a second pixel point in the first image is determined according to the transformation coefficient of the first pixel point and a color shading model; a color shading of the second pixel point is corrected according to the color shading contour of the second pixel point.

The invention relates to a digital video amplitude limiting method for analog broadcasting TV signals. The system used in the method comprises an audio/video decoder, an audio data cache, an amplitude detector, an amplitude limiter, and an audio/video encoder. The method comprises receiving an audio/video file, and decoding; amplitude detecting; amplitude limiting; and audio/video encoding. The invention can predict the level after modulation within the making domain and accordingly determine whether the video data result in over-standard level after modulation, so as to, after editing and making of a TV program file, detect the video data of the file, limit the over-standard pixel and solve the over-standard problem before D/A (digital to analog) conversion. The inventive method is implemented pixel by pixel, only limits amplitude of the over-standard pixel and does not process the other pixels, so as to minimize the influence on video data amplitude limiting, without causing the problem of overall compression due to local over-standard.

The embodiment of the invention discloses a video picture display method and device, a terminal and a storage medium, and belongs to the technical field of video processing. The method comprises the following steps: acquiring an original picture parameter of an nth video frame; determining a picture adjustment parameter of the nth video frame based on the standard picture parameter and the original picture parameter; performing display effect processing on the nth video frame according to the picture adjustment parameter, so that the actual picture parameter of the processed nth video frame is consistent with the standard picture parameter; and displaying the processed nth video frame. In the embodiment of the invention, different degrees of picture processing are performed according to the actual condition of the video frame, so that the final display effect of the video frame can reach an ideal state, and compared with a processing mode of directly adjusting picture parameters according to a fixed enhancement degree in the related technology, the video picture can be clearer and more natural, and the condition of weak picture processing effect or excessive processing is avoided.

A division circuit 11 divides input frames included in an input video Vi into plural pieces of partial data that are not superimposed with each other and outputs one piece of partial data for one input frame while switching selection of the partial data. A memory control circuit 14 writes the partial data output from the division circuit 11 in a frame memory 15, and reads a reconstruction frame that is configured by plural pieces of partial data based on a plurality of input frames that are different from each other and has a same size as the input frames from the frame memory 15. A composition circuit 19 composites the reconstruction frame read from the frame memory 15, and obtains an output video Vo that includes a composited frame. Thereby, an amount of access to the frame memory is reduced without deteriorating image quality significantly.

A signal converting apparatus includes the following elements. A converting section converts an input signal into output signals on the basis of the values of reference parameters, serving as references of a plurality of parameters for signal conversion, and the values of newly proposed parameters. An evaluation input receiving section receives an evaluation input indicating the selection of either the output signal based on the values of the reference parameters or the output signal based on the values of the newly proposed parameters. A parameter updating section linearly changes the values of the newly proposed parameters when the evaluation input indicates the selection of the output signal based on the values of the newly proposed parameters, and nonlinearly changes the values of the reference and newly proposed parameters when the evaluation input indicates the selection of the output signal based on the values of the reference parameters.

An image processing apparatus is disclosed by which correction of convergence and correction of distortion of an image can be performed with a high degree of accuracy. Correction data to be used for correction of position errors of the three colors of red, green and blue obtained by an adjustment apparatus in advance are stored in a storage section. The stored correction data are outputted to a correction waveform outputting section through a control circuit when necessary. The correction waveform outputting section produces correction waveforms based on the correction data inputted thereto and outputs the correction waveforms to a clock signal generation circuit. The clock signal generation circuit generates clocks, and the video data of red, green and blue stored in the memory are read out in response to the clock signals.