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Image processor, image processing program and image processing method

An image processor and image technology, applied in image data processing, image enhancement, electrical digital data processing, etc., can solve the problems of complex processing, difficulty in reducing circuit size, and insufficient removal of block distortion

Inactive Publication Date: 2003-02-26
SEIKO EPSON CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0011] However, in the first conventional example, since only the boundary pixels are corrected, the block distortion cannot be sufficiently removed
Moreover, in the case of VM and the second idiom, the processing is complicated and the computational load is too heavy
[0012] Furthermore, when such a technique is implemented in hardware, it is difficult to reduce the size of the circuit because the processing is rather complicated

Method used

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  • Image processor, image processing program and image processing method
  • Image processor, image processing program and image processing method
  • Image processor, image processing program and image processing method

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Embodiment Construction

[0109] Hereinafter, a first embodiment of the present invention will be discussed with reference to the drawings. Figures 1 to 8 is a diagram showing an image processor, an image processing program, and an image processing method according to the first embodiment of the present invention.

[0110] In this embodiment, the image processor, image processing program, and image processing method according to the present invention are applied to the following situations: as figure 1As shown, in the computer 100, when the moving image data compressed by the MPEG format is decoded by the OS (operating system) running in the multitasking mode, the moving image is reproduced, and the reproduced image is executed Filtering processing for reducing block noise and filtering processing for reducing floater noise. Hereinafter, the former filter processing will be referred to as deblocking filter processing, and the latter filter processing will be referred to as deringing filter processin...

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Abstract

An image processor is provided which simplifies filter processing and increases the speed when an image is decoded, and is suitable for realizing effective screen effect. In deblocking filter processing, as to a pixel array intersecting a boundary between adjacent blocks, pixel values v2' to v7' after filtering are computed by filter arithmetic equations as shown below. v2' = (v2+v5) / 2+(v2-v5) / 4; v3' = (v3+v5) / 2+(v3-v5) / 8 ; v4' = (v4+v5) / 2; v5' = (v5+v4) / 2+(v5-v4) / 8; v6' = (v6+v4) / 2+(v6-v4) / 4; v7' = (v7- (v7-v4) / 8.

Description

technical field [0001] The present invention relates to a method for filtering the expanded image when the image is expanded in units of blocks based on compressed image data compressed by JPEG (Joint Photographic Coding Experts Group) or MPEG (Moving Picture Experts Group) etc. Processors, programs and methods for processing, in particular, relate to image processors, image processing programs, and image processing methods, which can simplify and speed up filter processing when an image is decoded, and are suitable for use in Effective screen effects. Background technique [0002] JPEG is generally referred to as a compression technique for still images, and MPEG is generally referred to as a compression technique for moving images. In such an image compression method, a block of 8*8 pixels is used as a unit and DCT (Discrete Cosine Transform) is performed. DCT is used to decompose the original image into spatial frequency components. Images can be compressed by reducing...

Claims

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Application Information

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IPC IPC(8): G06F9/06G06F13/38G06T5/10
Inventor 石川真己三浦弘纲
Owner SEIKO EPSON CORP