Search for a specific shape in the image -


i learning digital image processing , met question. if have library of several shapes (they described non-analytic functions), , have picture contains 1 of shape (the shape in picture can scaled version of original 1 in library). there efficient algorithm detect this?

an example this. here real image

enter image description here

it contains circle-like shape, described set of parametric differential equations f1(dx/dt, x, y, t, p, s) = 0 , f2(dy/dt, x, y, t, p, s) = 0, x, y coordinates in 2 directions, t parameter, p , s constants determining shape. calculate p , s according image. able numerically solve equation given set of p , s.

thanks!

if shapes simple, try basic template matching http://docs.opencv.org/doc/tutorials/imgproc/histograms/template_matching/template_matching.html if expecting scale change, template matching must done in scale-space http://docs.opencv.org/doc/tutorials/imgproc/pyramids/pyramids.html


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