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Find position of an object in an other image

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Az
Az 2017-7-26
回答： Image Analyst 2017-7-26
I want to detect the position of a simple object of an image into another image. The object is like a simple rectangle of couple of overlapping rectangles with uniform color background.
I tried matlab functions of detectHarrisFeatures and detectSURFFeatures.
detectHarrisFeatures works well but fails when the pair of images have a different magnifications (change in number of pixels of the object). It also fails when there is a small disturbance (defect, hot spot, partical) in one of the image. Whereas detectSURFFeatures fails when the object is too simple (eg. just a rectangle)
Any suggestion? Thanks in advance

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Image Analyst
Image Analyst 2017-7-26
You might try Hu's moments which are rotation and scale invariant.
http://www.youtube.com/watch?v=Nc06tlZAv_Q

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