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Correlation value calculation device

A computing device and correlation value technology, which is applied in the direction of complex mathematical operations, calculations, image enhancement, etc., can solve the problem of increasing the circuit scale of the correlation value computing device, and achieve the effect of reducing the circuit scale

Pending Publication Date: 2019-11-12
OLYMPUS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

With the increase in parallelism of the correlation value calculation unit and the increase in the block size, the circuit scale of the correlation value calculation device also increases.

Method used

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no. 1 approach

[0032] refer to Figure 1 to Figure 8 A first embodiment of the correlation value computing device of the present invention will be described.

[0033] The correlation value calculation device 100 of this embodiment is installed in a device that performs noise reduction processing, motion vector detection, etc., and calculates a correlation value at high speed.

[0034] figure 1 It is a diagram showing the configuration of the correlation value computing device 100 . The correlation value calculation device 100 calculates a correlation value between a specific area (reference block) in one image (frame) and a specific area (reference block) having the same block size as the reference block.

[0035] Such as figure 2 As shown, the correlation value calculation device 100 of this embodiment calculates in parallel the correlation values ​​between a reference block whose center pixel is the pixel of interest (tx, ty) of an image (frame), and a plurality of reference blocks.

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no. 2 approach

[0122] refer to Figure 9 to Figure 13 A second embodiment of the present invention will be described. The form of the second intermediate correlation value calculation unit 32 of this embodiment is different from that of the first embodiment. In the following description, the same reference numerals will be assigned to the same configurations as those already described, and repeated descriptions will be omitted.

[0123] Figure 9 It is a figure showing the structure of the correlation value calculation apparatus 200 of this embodiment. The correlation value calculation unit 3A of the correlation value calculation device 200 has 24 first intermediate correlation value calculation units 31, 16 second intermediate correlation value calculation units B320, 40 second intermediate correlation value calculation units C321, and 64 second intermediate correlation value calculation units. Correlation value calculation unit D322 and correlation value interpolation unit 35 .

[0124...

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Abstract

A correlation value calculation device selects a pixel of interest in an image and a plurality of reference pixels in said image or in another image, and calculates correlation values between a standard block and a plurality of reference blocks, wherein the standard block includes the pixel of interest at a prescribed location, and the reference blocks each include the reference pixel at a prescribed location and have the same block size as the standard block. The correlation value calculation device is provided with: a block size determination unit; a first intermediate correlation value calculation unit which calculates the correlation values for the block sizes of the multiple kinds of blocks; a second intermediate correlation value calculation unit which calculates the correlation values for a part of the various kinds of block sizes; and a correlation value interpolation unit which obtains correlation values by interpolation.

Description

technical field [0001] The present invention relates to a correlation value computing device for computing correlation values ​​between images. Background technique [0002] In image processing such as noise reduction processing or motion vector detection, correlation value calculations between images are often performed. The correlation value represents the similarity between images. Correlation values ​​between two images (one is called a reference frame and the other is called a reference frame) in a specific region (reference block) in the reference frame and a specific region in the reference frame having the same block size as the reference block (Reference blocks) are calculated based on differences in pixel values ​​between pixels at the same position, and the like. For calculation of correlation values, calculation methods such as sum of absolute difference (SAD) and sum of square difference (SSD) are known. [0003] In noise reduction processing, motion vector d...

Claims

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Application Information

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IPC IPC(8): G06T7/00H04N5/14
CPCH04N5/14H04N19/43H04N19/53G06F17/15G06T7/223G06T7/32G06F17/18G06T3/4007G06T7/0002G06T2207/20224
Inventor 中岛彩小柴修
Owner OLYMPUS CORP
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