Mitsubishi Electric Corporation

Zeon Corporation

Mitsubishi Denki Kabushiki Kaisha

Hoya Corporation

Koji Minami

Toshihiro Gai

Masako Asamura

Chihiro Sakuwa

Satoshi Yamanaka

Noritaka Okuda

Shotaro Moriya

Hiroaki Sugiura

Hironobu Yasui

Takashi Fujiwara

Yoshitaka Toyoda

Shinsuke Shikama

Makoto Iikawa

Osamu Nasu

Kohei Teramoto

Masaki Yamakawa

Junji Sukeno

Tomonori Fukuta

Yoshito Suzuki

Shuji Sotoda

Taichi Sawaguchi

Yoshiteru Suzuki

Masahide Koike

Kunihiko Shimizu

Kazunori Komori

Tadashi Takishima

The image update timings of a plurality of display devices are adjusted by calculating, in their image reproduction/updating control means (), the phase difference between a synchronization adjustment signal (SAS) created from synchronization adjustment data (SAD) received from the transmitting apparatus TA by a data reception means () and an image display control signal (HC) output to the image display means (), and increasing or decreasing the period of the next and subsequent image display control signals (HC) according to the phase difference, thereby reducing the phase difference. Image updating in the plurality of display devices can be synchronized to within a fixed tolerance range.

Multi-screen display system

An intermediate image generating means () generates a horizontal intermediate image (D) and a vertical intermediate image (D) by extracting components of an input image (DIN) in a particular frequency band; an intermediate image processing means () generates a horizontal image (DBh) and a vertical image (DBv) by performing non-linear processing (A) and high-frequency component generation (B); an intermediate image (D) is obtained by combining these horizontal and vertical images by performing weighted addition for each pixel and is added () to the input image (DIN) to obtain an enhanced output image (DOUT). Even if the input image includes a fold-over component on the high-frequency side or does not include an adequate high-frequency component, adequate image enhancement processing can be carried out.

Image display apparatus, image processing apparatus and method to output an image with high perceived resolution

A first intermediate image generating means () generates an intermediate image (D) by extracting a component of an input image (DIN) in a particular frequency band; a second intermediate image generating means () generates an intermediate image (D) having a frequency component higher than intermediate image (D); an intermediate image processing means (M) generates an intermediate image (DM) by suppressing low-level noise included in intermediate image (D); an intermediate image processing means (H) generates an intermediate image (DH) by suppressing low-level noise included in intermediate image (D); and an adding means () adds the input image (DIN) and intermediate image (DM) and intermediate image (DH) together to obtain a final output image (DOUT). Even if the input image includes a fold-over component on the high-frequency side or does not include an adequate high-frequency component, an enhanced image can be obtained without enhancing noise.

Image processing apparatus and method and image display apparatus

There are provided a first intermediate image generating means () for generating a first intermediate image (D) by extracting a component in a vicinity of a particular frequency band in an input image (DIN), a second intermediate image generating means () for generating a second intermediate image (D) from the first intermediate image (D), and an adding means for adding the input image (DIN) and the second intermediate image (D). The second intermediate image generating means () includes a non-linear processing means (A) that varies the content of its processing according to the pixel in the intermediate image (D). Even if the input image includes a fold-over component on the high-frequency side or does not include an adequate high-frequency component, adequate image enhancement processing can be carried out.

A first intermediate image generating means () generates an intermediate image (D) by extracting a component of an input image DIN in a particular frequency band; a second intermediate image generating means () generates an intermediate image Dhaving a frequency component higher than the intermediate image (D); a first intermediate image processing means (M) generates an intermediate image (DM) by amplifying the pixel values in the intermediate image (D); a second intermediate image processing means (H) generates an intermediate image (DH) by amplifying the pixel values in the intermediate image (D); and an adding means () adds the input image (DIN) and the intermediate image (DM) and the intermediate image (DH) together to obtain an output image (DOUT). A first amplification factor (DMA) and a second amplification factor (DHA) are determined according to pixel values in the input image (DIN). Even if the input image includes a fold-over component on the high-frequency side or does not include an adequate high-frequency component, an enhanced image can be provided without causing overshoot.

A frame interpolation apparatus generates a pixel value at an interpolation position by examining pairs of pixel blocks, one from a preceding reference frame and one from a following reference frame, located in positions that are point-symmetric or nearly point-symmetric with respect to the interpolation position. The pair of pixel blocks showing the greatest mutual similarity is selected, the central pixels in the selected pair of pixel blocks are taken as reference pixels, and the interpolated pixel value is generated from the reference pixel values. By routinely examining a large number of pairs of pixel blocks for each interpolation position, the frame interpolation apparatus can detect image motion accurately and generate accurate interpolated values.

Frame interpolation apparatus and frame interpolation method

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 noise reducer for a signal determines a direction of correlation for each picture element (pixel) by calculating sums of absolute differences between a block centered on the pixel and neighboring blocks centered on surrounding pixels and choosing the direction of the neighboring block with the least sum of absolute differences. The pixel is then filtered one-dimensionally by averaging it with neighboring pixels located in the direction of correlation. This noise reduction method is simple, reliable, and avoids needless loss of detail.

Noise reducer for video signals

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

A resin composition includes an alicyclic structure-containing polymer; a hindered amine compound; and a releasing agent, wherein the releasing agent and the alicyclic structure-containing polymer satisfy the following relationship: 10&#x2267;|s1&#x2212;s2|&#x2267;0.8 [(MPa)], wherein s1 represents a solubility parameter of the releasing agent, and s2 represents a solubility parameter of the alicyclic structure-containing polymer. The resin composition can be used as optical materials, such as a lens, a diffraction grating, and a prism, especially in the field of using blue laser, and has excellent releasability, transparence and colorless property as well as excellent resistance to laser.

Resin composition

A fixing method for a resin lens in which a resin lens element is fixed to a resin lens frame, includes forming the resin lens element and the resin lens frame using amorphous polyolefin as a resin material therefor; forming an abutting surface in each of the resin lens element and the resin lens frame so as to mutually abut against each other; abutting the resin lens element and the resin lens frame mutually against each other at the abutting surfaces thereof; and laser welding the abutting surfaces to each other by irradiating a laser beam thereon.

Fixing method for resin lens

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

There is disclosed a display device using a color wheel having a color filter Cw, in addition to normal color filters corresponding to the three primary colors. The filter Cw has almost flat spectral transmission characteristics. Brightness information included in a color image signal is quantized with (n+m) bits. Information corresponding to the lower-order n bits is displayed by light transmitted through the filter Cw. Information corresponding to the upper-order n bits is displayed by light transmitted through the normal color filters. Only brightness information to which the human eye is visually sensitive is reproduced by the filter Cw having a lower transmissivity. This can eliminate a lack of the number of gray levels due to a constraint on the minimum switching speed of a light valve. Furthermore, the brightness little deteriorates.

Growing community of inventors

Tokyo, Japan

Koji Minami