OpenCv找到相似的图像

Question

I'm trying to play with the match_template in opencv,
i try to match this two image,
this is the image > https://imgur.com/a/Heea7vm
the stars I want to search > https://imgur.com/a/9IxHNkI .
The result is over 0.9 which is really good , but when the image change to other monster such as :
https://imgur.com/a/oqjoDOl
the result is 0.5 only
or when a same monster with more stars such as :
https://imgur.com/a/vTFPuBz
the result is even higher then other 2star monster

I want to use the star image to search all two stars monster , i tried using different matching method in 2 days and I cant really achieve this image serach

Is there any ways/recommendation to help me achieve this kind of image search ?
Thanks!!

Answer 1

You could try doing the template not with the original images, but with canny edge detection added to both of them, so it should only match the edges of the starts. Maybe even try messing with the color channels, making those stars pop out more from the template/image.

Here is something more for you to read.