why should i subtract mean of image when searching for position of sub-image in image?

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Dror Aizik
Dror Aizik 2020-5-14
回答： Jalaj Gambhir 2020-8-27
i have tried several times to find position of sub-image inside the bigger image, and i found out that i must substract the mean of the images for it.
i still couldn't understand why.
can someone help please?

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回答（1 个）

Jalaj Gambhir
Jalaj Gambhir 2020-8-27
Hi,
I am not sure the complete process that you are following, but subtraction with mean Image is generally done to center the image. It is a common preprocessing step for most Image Processing algorithms.
Hope this helps!

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