Sharp Kabushiki Kaisha Corporation

Sharp K.k.

Yoji Noguchi

Noritoshi Kako

Hiroyuki Katata

Masaki Takakura

Yasukuni Yamane

Tomoko Aono

Masayuki Katagiri

Hiroyuki Furukawa

Takeshi Masuda

Keisuke Iwasaki

Hiroshi Akagi

Hideo Takemura

Masaaki Hyodo

Hideto Hayasaki

Masao Izumi

A light guide plate () is configured to allow light output from a display element () to be propagated therein and to allow at least a part of the light propagated therein to be reflected by a plurality of reflective structures (). The plurality of reflective structures each include a reflective surface () inclining with respect to a light output surface (S). The guide plate includes a first transparent member (A); a second transparent member (B); and a third transparent member () provided between the first transparent member and the second transparent member. The plurality of reflective structures are provided at positions in contact with the third transparent member.

Light guide plate and virtual image display device

An apparatus for concealing an error of a moving pictures transform coding includes the first concealment circuit (19) for analyzing data according to a type of the data, the data being error-detected but not corrected by an error correction decoding by the decoder (12), for replacing the data with a specific data according to the analyzed result by using a predetermined method, and for outputting a specific signal therefrom, and the second concealment circuit (22) connected to the first concealment circuit (19) for replacing reproduced pixel values of an error-occurred block with reproduced pixel values of a previous frame according to the signal output from the first concealment circuit (19) in case that the data being error-detected but not corrected is data of a predetermined frequency component or data of an additional information.

Apparatus for concealing error in transform coding of a motion picture

A bit allocation method which facilitate control of the number of bits to be assigned to transform coefficients and block of image data with a deviation from the functional form. An image coding system which can implement an optimal bit allocation that minimizes quantization error under a predetermined information content or amount, in carrying out bit allocations of block-adaptive type and transform coefficient-adaptive type.

Image coding system using an orthogonal transform and bit allocation

An image processing apparatus comprises a liquid modulator having a photoconductive material including an image-writing plane, a liquid crystal layer laminated on the photoconductive material, a pair of electrodes sandwiching the photoconductive material and the liquid crystal layer, and a spacer inserted between the photoconductive material and one of the electrodes. Also provided are an analog writing system for analogously writing an original image in the light modulator; a digital reading system for digitally reading the image written in the light modulator; a processing section for image-processing the read image data; a digital writing system for digitally writing processed image data in the light modulator; and, an analog reading system for analogously reading an image written in the light modulator. The liquid crystal layer is either a phase-transition type liquid crystal, a p-type smectic A liquid crystal providing a storage function, or a ferroelectric liquid crystal providing a storage function. The phase-transition type liquid crystal is selected from a group consisting of (1) a p-type cholesteric liquid crystal and (2) a mixture of p-type cholesteric liquid crystal and p-type nematic liquid crystal. The ferroelectric liquid crystal is selected from a group consisting of (1) a chiral smectic C liquid crystal, (2) a mixture of chiral smectic C liquid crystal and non-chiral smectic C liquid crystal, and (3) a mixture of chiral smectic C liquid crystal and a photoactive material.

Image processing apparatus employing a spatial light modulator

An image compressing apparatus forms a synthetic image from a plurality of image data. The apparatus includes a device for sorting a plurality of image data into a plurality of image types in accordance with at least one of a nature and a use of each image data, a device for selecting an image compressing method out of a plurality of predetermined various image compressing methods for each image data in accordance with the sorted image type, and a device for compressing the image data in accordance with the selected image compressing method and recording the compressed image data in a recording medium.

Image compressing apparatus and image coding synthesizing method

An image processing apparatus includes a light modulator, an analog writing system for analogously writing an image of an original in the light modulator, a digital reading system for digitally reading the written image out of the light modulator, a processing section for processing the read image data, a digital writing system for digitally writing the processed image in the light modulator, and an analog reading system for analogously reading the image written on the light modulator. The light modulator includes a photoconductive material, a liquid crystal layer laminated on the photoconductive material, and a pair of electrodes sandwiching the photoconductive material and the liquid crystal layer. The liquid crystal layer can provide a storage function so as to enable the reading and writing of the image from the same direction.

Analog/digital image processor apparatus with liquid crystal light

In an image data compression method to be employed in coding digital image data whose pixels are represented by n bits and which include 2.sup.n different types of runs, while a run length of a current run is counted, a value representing a run type of the current run is predicted. The prediction is repeated till a predicted value coincides with an actual value of the run type of the current run. When a predicted value does not coincide with the actual value of the run type of the current run, a run length for an imaginary run having the predicted value is regarded as zero and the run length 0 of the imaginary run is entropy coded. On the other hand, when a predicted value coincides with an actual value, the actual run length of the current run is entropy coded.

Image data compression method using a run prediction technique

A text image data compression system for compressing image data having pixels each being expressed by N bit data which varies from a maximum value to a minimum value, includes a circuit for replacing the maximum value N bit data with a first symbol '3' followed by N-1 bit common data '*' and the minimum value N bit data with a second symbol '2' followed by N-1 bit common data '*'. Also provided is a circuit for making a symbol alignment such that the most significant symbols are collected and are aligned from the first row to the bottom row, the second significant symbols are collected and are aligned from the first row to the bottom row, kth significant symbols are collected and are aligned from the first row to the bottom row, in which k is between three and N-1, and the least significant symbols are collected and are aligned from the first row to the bottom row, and that all of said common symbols '*' are removed; and a circuit for detecting run lengths in the symbol alignment to produce run lengths of four different symbols '3', '2', '1' and '0'.

Text image data compression system

A device for editing and displaying an image uses a medium such as a transparent film or a magnetic card on which are recorded both display data and commands for specifying how the display data should be processed. Such data are received by the device through a camera, a magnetic record reader and/or the like and stored in a memory device. Digital image processing is performed on such stored data according to the commands and an image according to the processed data is displayed.

Device for editing and displaying data recorded on specialized sheets or

A device and a process systematically combine various independent image processings into composite processings. The device uses an image processing device that independently sets the scanning method of scanning points P, a decision reference as to whether or not processing is performed on the scanning point P (which is a scanning point P'), a processing point Qi for performing the processing, and the processing contents to be performed with respect to the processing point Qi.

Image processing device

An image processing device includes a multipurpose memory which stores intensity information as well as label information and a look-up memory. The output from the multipurpose memory is connected to an address of the look-up table memory and is converted by the look-up table memory. The image processing device operates to select an area in an image without erasing the data of an image to be processed and to change the color at a very high speed.

An image processing device is provided with a first memory and a second memory for storing color light and shade information of at least two portions of a picture, a coordinate inputting device, and a device for transferring and processing between the first memory and the second memory of the image information specified by the coordinate inputting device. Additionally, the image processing device has at least two display units and devices for simultaneously performing cursor-displays in the different image portions of the picture in accordance to the information from the coordinate inputting device. Each of the devices for performing cursor-displays provides images different in shape from each other.

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Nara, Japan

Yoji Noguchi