Correlation value calculation device
A computing device and correlation value technology, applied in the directions of calculation, image analysis, 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
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[0026] (Embodiment)
[0027] refer to Figure 1 to Figure 7 An embodiment of the correlation value computing device of the present invention will be described.
[0028] The correlation value computing device 100 of the present embodiment is installed in a device that performs noise reduction processing, motion vector detection, and the like, and calculates correlation values at high speed.
[0029] figure 1 It is a figure which shows the structure of the correlation value calculation apparatus 100. The correlation value calculation device 100 calculates a correlation value between a specific region (reference block) in one image (frame) and a specific region (reference block) having the same block size as the reference block.
[0030] like figure 2 As shown, the correlation value calculation device 100 of the present embodiment calculates a correlation value between a reference block whose center pixel is the pixel of interest (tx, ty) of an image (frame) and at least o...
Example Embodiment
[0113] (Variation 1)
[0114] For example, the correlation value calculation device 100 of the above-described embodiment is a circuit that calculates the sum of absolute difference values (SAD) as the correlation value, but the correlation value is not limited to this. For example, the correlation value may also be a difference sum of squares (SSD), a normalized cross-correlation (NCC), or a zero-mean normalized cross-correlation (ZNCC), or the like.
Example Embodiment
[0115] (Variation 2)
[0116] In the above-described embodiment, the block size is 9×9, but the block size is not limited to this. For example, a block size such as 16×16, 15×15, 5×5, and 3×3 may be used, and a block size such as 15×9 may also be used.
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