Mitsubishi Electric Corporation

Mitsubishi Denki Kabushiki Kaisha

Noritaka Okuda

Jun Someya

Satoshi Yamanaka

Shotaro Moriya

Koji Minami

Toshiaki Kubo

Masaki Yamakawa

Hideki Yoshii

Hiroaki Sugiura

Yoshitaka Toyoda

Hironobu Yasui

Akihiro Nagase

Kyoichiro Oda

Masaaki Hanai

An image display device includes a liquid crystal panel section, a light source section divided into a plurality of regions, a light detection section detecting the light intensity of the light source section, and a timing generation section. The timing generation section generates a light emission drive signal which turns on each of the regions of the light source section according to scanning in the liquid crystal panel section, and which turns on all the regions of the light source section in a light detection period, and generates a light detection gate signal allowing the detection of the light detection section to be effective in the light detection period.

Image display device

In the image processors and the image processing methods of the present invention, the number of bits for quantizing image data is adjusted on the basis of a dynamic range of each block. Therefore, the error introduced by encoding is reduced without increasing the data amount of the encoded image data, and the response speed of a liquid crystal can be controlled appropriately by preventing unnecessary voltages from being applied due to the error introduced by encoding.

Image processor, image processing method, image encoder, image encoding method, and image display device

A method and apparatus for processing images, and an image display apparatus are provided that can produce favorable images even when digitized image are partially magnified (enlarged) or reduced (shrunk). The apparatus for expanding or reducing input image data supplied thereto, for each area of the image data, comprises a high frequency (HF) component smoothing processor that generates smoothed-HF-component image data by smoothing HF components of the input image data; a partial magnification/reduction controller that generates partial magnification/reduction control information that designates positions of pixels in image data obtained after expanding or reducing the input image data for each image area; and a pixel data generator that generates pixel data of pixel positions designated by the partial magnification/reduction control information in the smoothed-HF-component image data, by using pixel data in a neighborhood of the designated pixel positions.

Method and apparatus for high frequency component smoothing, and image display apparatus

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

An image processing apparatus determines a reference pixel position for each pixel by an interpolation calculation using the distortion correction values for representative pixels stored in a correction value storage unit, decides whether the distortion correction values used in the interpolation satisfy a predetermined condition, reads a plurality of pixel values from an image data storage unit according to values of their reference pixel position, determines first interpolation coefficients from a value of its reference pixel position, and determines the pixel value in the output image from the plurality of pixel values read and the first interpolation coefficients. The image processing apparatus determines second interpolation coefficients from said value of its reference pixel position and a predetermined function, and selects, according to the decision result, either the second interpolation coefficients or third interpolation coefficients for use as the first interpolation coefficients.

Apparatus and method for correction of projected images

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.

An image processor is provided with the high-frequency component detecting unit that calculates a convolution for each of regions of interest in part of an image region of input image data, to output the high-frequency component detection result for each pixel of interest; the smoothing unit that smoothes the image data, to output the smoothed image data; and the image data processing unit that combines based on the high-frequency component detection result the image data with the smoothed image data, to output the combined image data; wherein the image data processing unit varies the combination rate for the smoothed image data, based on the high-frequency component detection result. Thereby, even when a region in the image data contains such high frequency components as a checkered pattern has, an image resistant to moir&#xe9; that would be generated in magnifying or reducing of the image on a region basis can be displayed without deterioration of image quality.

Image processor and method therefor, and image display device

There are provided a first image enlarging means (A) for enlarging the input image (Din) and outputting a first enlarged image (DA); a high-frequency component image generating means () for extracting a high-frequency component of the input image (Din) and generating a first high-frequency component image (D); a second image enlarging means (B) for enlarging the first high-frequency component image (D) and outputting a second enlarged image (DB); a high-frequency component image processing means () for processing the second enlarged image (DB) and generating a second high-frequency component image (D); and a means () for adding the first enlarged image (DA) and the second high-frequency component image (D) and outputting the result. This provides the enlarged image with adequate high-frequency components, and a sense of resolution of the enlarged image can be obtained.

Image processing apparatus and method and image display apparatus and method

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.

An image encoding device includes a dynamic range generator for outputting dynamic range data Ddof block image data Dc, an average value generator for outputting average value data Deof the block image data Dc, a number-of-pixel reducing unitfor decreasing number of pixels of the block image data by reduction-number of pixels to generate reduced-number-of-pixel block image data Dc', an encoding parameter generatorfor generating encoding parameter paspecifying a quantization bit rate and the reduction-number of pixels in accordance with the dynamic range data Dd, a quantization threshold generatorfor generating a quantization threshold value tb, and an image data quantizerfor generating quantized image data Dffrom the reduced-number-of-pixel block image data Dc&#x2032; with use of the quantization threshold value tb

Image encoding device, image processing device, image display device, image encoding method, and image processing method

In a liquid-crystal-driving image processing circuit that encodes and decodes image data to reduce the frame memory size, the present invention has the object of providing a liquid-crystal-driving image processing circuit capable of correcting image data accurately and applying appropriately corrected voltages to the liquid crystal without being affected by encoding or decoding errors, even when moving images are input. To achieve the above object, the liquid-crystal-driving image processing circuit according to the present invention takes a difference between first decoded image data corresponding to the image in the current frame and second decoded image data corresponding to preceding-frame image data, selects either the image data of the current frame or the second decoded image data for each pixel on the basis of the difference, thereby generates preceding-frame image data, and corrects the gray-scale values of the image of the current frame on the basis of the preceding-frame image data and the image data of the current frame.

Liquid-crystal-driving image processing circuit, liquid-crystal-driving image processing method, and liquid crystal display apparatus

An image processing device and an image processing method according to the present invention, by dividing an image into a plurality of blocks, generates a control signal denoting a change in the image data, based on a result of comparing first encoded image data that is quantized from image data in each of the blocks based on representative values of the image data in each of the blocks with second encoded image data that is obtained by delaying the first encoded image data for a period equivalent to one frame, and generates one-frame-preceding image data by choosing on a pixel to pixel basis either the current-frame image data or second decoded image data that is obtained by decoding the second encoded image data, based on the control signal.

Image processor, image processing method, and image display device

An image processing circuit for driving a liquid crystal that encodes and decodes image data to reduce the size of the frame memory that, when it quantizes () each block of image data in the current frame and outputs encoded data, selects () a mean value on the basis of the dynamic range of each unit block and adjusts the amount by which the image data is reduced (). This type of control enables it to reduce the amount of image data that must be temporarily stored in the delay circuit (), so the size of the frame memory constituting the delay circuit can be reduced while minimizing the encoding error that occurs in the encoder (). Consequently, the image data can be corrected accurately and appropriate voltage corrections can be applied to the liquid crystal without the effects of coding and decoding errors.

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Tokyo, Japan

Noritaka Okuda