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Image processing apparatus, and method thereof

An image processing device and image technology, applied in image data processing, image analysis, image communication, etc.

Inactive Publication Date: 2012-08-08
SONY CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003]However, it is difficult to detect when the scene changes, the object moves into an area outside the search area, or the brightness of the image changes significantly such as during a fade-in / fade-out transition Accurate or less reliable motion vectors
As a result, when such motion compensation processing is performed, distortion may occur in an image generated by performing interpolation

Method used

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  • Image processing apparatus, and method thereof
  • Image processing apparatus, and method thereof
  • Image processing apparatus, and method thereof

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Experimental program
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Embodiment Construction

[0069]The input image is temporarily stored in the frame memory 11 . The frame memory 11 supplies an image of one frame before the input image (hereinafter referred to as an immediately preceding image) to the motion vector estimation unit 12 and the motion compensation processing unit 13 .

[0070] The motion vector estimation unit 12 includes a sum of absolute differences calculation section 12a, a comparison section 12b, and a motion vector calculation section 12c. For each pixel in the input image, the motion vector of the pixel is calculated by the motion vector estimation unit 12 using the input image and the immediately preceding image. More specifically, the sum calculation section 12a of absolute differences reads the pixel in the block of interest corresponding to the pixel of interest (processing target pixel) in the input image, and the pixel corresponding to the pixel in the immediately preceding image (reference pixel). pixels) in the reference block. For each ...

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Abstract

An image processing apparatus includes a unit configured to calculate a sum of absolute differences between pixel values of pixels in a block of interest and pixel values of pixels in a reference block, a unit configured to compare sums of absolute differences calculated and to determine a minimum sum of absolute differences thereamong, a unit configured to estimate a motion vector for the pixel of interest using the reference pixel having the minimum sum of absolute differences and the pixel of interest, a unit configured to generate a motion-compensated image by using pixel values of the pixels as pixel values of corresponding pixels in the motion-compensated image, a unit configured to cumulatively add sums of absolute differences, and a unit configured to generate an interpolation image by mixing the pixels and corresponding pixels in the motion-compensated image according to an obtained cumulative-sum result.

Description

technical field [0001] The present invention relates to an image processing device, method and program. In particular, the present invention relates to an image processing apparatus, method, and program capable of reducing distortion of an image generated by performing interpolation, the brightness of which changes significantly and in which the distortion tends to to happen. Background technique [0002] In general, there is a process in which a motion vector is detected by performing a block matching technique, and by performing motion compensation processing using the motion vector, a new interpolation image (interpolation frame) is obtained from the images temporally before and after the interpolation image ( generated in each frame). [0003] However, in the case where a scene changes, a subject moves to an area outside the search area, or the brightness of an image changes significantly as during a fade-in / fade-out transition, it is difficult to detect an accurate m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N7/26H04N5/14G06T3/00G06T7/20H04N7/01
CPCG06T7/11H04N7/014
Inventor 冈田绅太郎西堀一彦西智裕井原利升黑川益义
Owner SONY CORP