how can i find t closest image in many images?

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heo jaemu
heo jaemu 2015-1-26
评论： Image Analyst 2015-1-29
when i have a original image, which function can help me to find closest image in database?
i want to find the most similar one.

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Image Analyst
Image Analyst 2015-1-26
Other than RMS, there is also SSIM, PSNR, and MD or relative MD. There are functions for psnr() and ssim() in the Image Processing Toolbox.
  2 个评论
heo jaemu
heo jaemu 2015-1-29
if 2 images have different angle(but, similar angle and view), I want to find features that prove 2 images are equal. ex) distinct corners
Image Analyst
Image Analyst 2015-1-29
Well the images won't be equal if something is different, angle or view. But you can find parts of the image that may be similar or in different locations with functions in the Computer Vision System Toolbox: http://www.mathworks.com/products/computer-vision/features.html#object-detection-and-recognition

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Thorsten
Thorsten 2015-1-26
Well, there is lots of research devoted to this question. One simple way would be to compute the RMS (root mean squared) difference between the images:
D = sqrt(mean((im2double(I1(:)) - im2double(I2(:))).^2));
This works only if the images have the same size.

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