Mitsubishi Denki Kabushiki Kaisha

Mitsubishi Electric Corporation

Masako Asamura

Ken Onishi

Tomohiro Ueda

Taketoshi Hibi

Tohru Inoue

Junko Ishimoto

Sadayuki Inoue

Shuichi Kagawa

Hiroaki Sugiura

Yoshiko Hatano

Tatsuo Yamasaki

Koji Minami

Toshihiro Gai

Nobuyoshi Okumura

Chihiro Sakuwa

Satoshi Kurahashi

Miki Sugano

Satoshi Yamanaka

Yoshitaka Toyoda

Kohei Kurihara

Kosaku Yamagata

Junko Shinohara

Takashi Okamoto

Kazuya Maeshima

Daisuke Suzuki

Jun Someya

Hiroyuki Kawano

Masaki Yamakawa

Yoshiki Ono

Toru Aramaki

Tadashi Minobe

Yoshito Suzuki

Toru Aoki

A first group of interpolation calculators performing interpolation by mean preserving interpolation calculation, and a second group of interpolation calculators performing interpolation by interpolation other than the mean preserving interpolation calculation are provided. Each of the interpolation calculators performs interpolation calculation for the missing pixel to calculate an interpolation candidate value (M(h)), and calculates test interpolation values (M(t)) treating pixels in a vicinity of the missing pixel as test pixels. A decider () selects one of the plurality of interpolation calculators based on results of the test interpolation. An outputter () selects the interpolation candidate value outputted from the interpolation calculator selected by the decider (), among the plurality of interpolation candidate values (M(h)), and outputs the selected interpolation candidate value. Interpolation can be performed such that the interpolated pixel does not look unnatural, and yet the storage capacity and the data processing amount that are required are relatively small.

Pixel interpolation device and pixel interpolation method, and image processing device, and program and recording medium

A signal processing device () uses first characteristic data detected from a sheet-like detection target by a first detection element () and second characteristic data detected from the detection target by a second detection element () and having (i) a characteristic that is different from a characteristic of the first characteristic data and (ii) a correlation with the first characteristic data. The signal processing device () includes an evaluation value generator () that generates, by using the correlation with the second characteristic data, an evaluation value determining whether the first characteristic data includes an unnecessary portion, and a correction amount determiner () that determines, by using the evaluation value, for correction of data determined by the evaluation value generator () to be the unnecessary portion, a correction amount for the first characteristic data.

Signal processing device

There are provided a line sensor () including two first sensor pixel rows () and a second sensor pixel row (); an image obtaining unit () to obtain, from electrical signals obtained by scanning an original in a sub-scanning direction with the two first sensor pixel rows (), two first read image data items, and obtain, from electrical signals obtained by scanning the original in the sub-scanning direction with the second sensor pixel row (), a second read image data item; and an image processor () to incorporate one or more pixel data items of one or more pixels included in an interval between the two first sensor pixel rows () out of the second read image data item into the two first read image data items, thereby generating a line image data item in which the one or more pixels in the interval are not vacant.

Image reading device and image reading method

An image reading apparatus includes: N sensor chips arranged in a first direction and each including a plurality of image pickup elements arranged in the first direction; N optical systems that form, on the N sensor chips, reduced-size images of N reading ranges arranged in the first direction on a document; and an image processing section that uses image data of overlap regions to obtain positions of the overlap regions, obtains, based on the positions and predetermined synthesis reference positions in the overlap regions, magnifications of read images and synthesis positions, performs image processing of correcting the magnifications in the first direction of the image data of the N reading ranges, and combines the image data of the N reading ranges subjected to the image processing, thereby generating synthesized image data.

Image reading apparatus and image reading method

Image processors are provided for respective groups formed by grouping of images, the order of which is sequential when images respectively having overlapping portions corresponding to the same portion of an object are arranged so as to be adjacent to each other, and concurrently perform processing to detect combining-position information for combining an image in a group and an image adjacent to the image without any positional displacement by image-matching. The combining-position information between images belonging to different groups is respectively transferred, via combination-information transferring paths, between the image processors and between the image processors.

Image combination device, image reading device and image combination method

In a motion detection device that detects motion from two frames of a video signal, a pattern matching detector determines pattern similarity between pixel blocks centered on a pixel of interest in the two frames to detect pattern motion. An edge detector detects edge presence and direction in a vicinity of the pixel of interest. A frame difference detector generates a smoothed frame difference signal for the pixel of interest. The smoothing is carried out within appropriate extents selected according to the detected pattern motion and edge direction. A motion information corrector generates motion information for the pixel of interest from the frame difference signal. Appropriate selection of the smoothing extent reduces motion detection mistakes. The motion information is useful in motion adaptive video signal processing.

Motion detection device and method, video signal processing device and method and video display device

An image display apparatus, and an apparatuse for and a method of image processing are provided that can reduce in real time a quantization noise in an image signal received by the image display apparatus. The image processor apparatus includes a variation calculator that calculates, as a variation B of grayscale, a difference in a grayscale value between adjacent pixels in a single dimension in a spatial direction, of an image signal A; a variation limiter that limits a range of a possible value of the variation B calculated by the variation calculator; a gradient determination unit that calculates a gradient of grayscale of image signals from the variation C having the value limited; an additional bit generator that generates an additional bit, based on the image signal grayscale gradient calculated by the gradient determination unit; a bit adder that adds to the image signals the additional-bit-generator-generated additional bit, to output the additional-bit-added image signals; and a display unit that displays an image based on an image signal to be output from the bit adder.

Image display apparatus, and method and apparatus for processing images

A video noise reducer processes a frame difference signal equal to the difference between the video signal of the current frame and the video signal of the preceding frame or the difference between the video signal of the current frame and the noise-reduced video signal of the preceding frame to obtain a motion detection signal and a noise detection signal. The difference between the motion detection signal and the noise detection signal is then processed to obtain a recursion coefficient. The frame difference signal is multiplied by the recursion coefficient and the resulting product is additively combined with the video signal of the current frame to reduce noise without generating significant motion artifacts.

Noise reducer, noise reducing method, and video signal display apparatus that distinguishes between motion and noise

A video signal processing apparatus, which can prevent degradation of picture quality in converting an interlaced scan video signal to a progressive scan video signal, includes an interframe correlation detection means (); an interfield correlation detection means (); a field resolution determination means () which generates a signal (filhv) indicative of a degree of high frequency components existing in a field; a pull-down sequence detection means () which generates a telecine detection signal (tci) indicating whether or not an input video signal is any of 2-3 pull-down telecine video signal and 2-2 pull-down telecine video signal and also generates a mixing ratio signal (tcmix) indicative of a mixing ratio used at the time of interpolation processing; an interpolation signal generation means () which mixes a plurality of kinds of interpolation signals (Im, It) in accordance with the telecine detection signal (tci) and the mixing ratio signal (tcmix); and a rate doubling conversion means () which generates the progressive scan video signal (Prog) from a delayed video signal (R) and an interpolation signal (I).

Video signal processing apparatus, video signal processing method, and video signal display apparatus

A color conversion device and method are provided in which six hues and inter-hue areas are corrected independently, and the conversion characteristics can be changed flexibly, and which does not require a large-capacity memory. Coefficients of second-order and first-order calculation terms relating to the respective hues, first-order calculation term using comparison-result data relating to the respective inter-hue areas, and product terms based on the comparison-result data and the hue data are changed so as to change the target hue or inter-hue area, without influencing other hues or inter-hue areas.

Color conversion device and method

A gray-scale conversion means () converts the gray scale of an input video signal () as necessary, and outputs the video signal with the converted gray scale. A statistical processing means () detects a statistical property of each field or frame of the input video signal; a scene change detection means () detects scene changes in the input video signal. A conversion characteristic determination means () determines the gray-scale conversion characteristic according to outputs of the statistical processing means () and the scene change detection means (). The gray-scale correction increases contrast regardless of image content, and enables faster response to changes in image content.

Gray-scale improvement circuit and display system

A video signal processing circuit that uses a prescribed clock signal to process a digitized composite video signal. A clock generating means () generates the prescribed clock signal; a burst phase detecting means () detects color subcarrier phase information (p) in each line of the composite video signal; a phase difference calculation means () finds the phase difference between phase information (p) from the burst phase detecting means and a prescribed reference phase; a sampling phase conversion means () corrects the sampling phase of the composite video signal according to phase corrections (&#x394;b, &#x394;t) obtained from the phase difference calculation means (); a Y/C separation means () separates the luminance and chrominance signals from the composite video signal output from the sampling phase conversion means (). Excellent two- or three-dimensional Y/C separation can be obtained regardless of the television broadcast system, even from a non-standard signal.

Video signal processing circuit, video signal display apparatus, and video signal recording apparatus

Data separating means extracts intra-frame or intra-field encoded blocks from an intra-frame or intra-field encoded, and inter-frame or inter-field encoded digital video signal, and a digital audio signal contained in an input bit stream. Error correction code appending means appends error correction codes to the extracted intra-encoded blocks. Recording means records the data having the error correction code appended, in special replay data recording areas predefined on the magnetic recording tape. During fast replay or slow replay, error correction is achieved even for the replay signal with a low output level and a poor symbol rate.

Device for recording digital video and audio signals in designated areas of a recording medium in a predetermined track format

In the conversion of a video signal from interlaced to progressive scanning, the value of each pixel on an interpolated scan line is calculated by a procedure that includes calculating similarity values for pairs of pixel blocks located in point-symmetrical positions on opposite sides of the interpolated pixel; deciding whether similar edges are present in corresponding positions in the two pixel blocks constituting each pixel block pair; selecting an interpolation direction corresponding to the most similar pixel block pair among the pixel block pairs in which the similar edges are present; and using the pixels disposed at or closest to the centers of the two pixel blocks in this pixel block pair as reference pixels. Restricting diagonal interpolation directions to pixel block pairs in which similar edges are present improves the accuracy of the interpolation direction.

Scan line interpolation device, image processing device, image display device, and scan line interpolation method

In a digital VTR having a certain recording bit rate, within a range not higher than a remaining data rate after recording the bit stream, first HP data Dis recorded in first specific regions, and second HP data Dis recorded in second specific regions in specific tracks. In middle-speed and high-speed fast replay, the magnetic tape is transported continuously at a middle-speed or high-speed higher than the standard speed for normal replay, and the first HP data Dis used in common, and at a low-speed fast replay of about twice the normal speed, the speed of the magnetic tape is alternated between a speed near the standard speed for normal replay, and a speed near the low-speed fast, and at the speed near the standard speed, the second HP data disposed in the second specific regions in the specific tracks and the first HP data disposed in the first specific regions in the specific tracks are both replayed.

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Tokyo, Japan

Masako Asamura