Compare images based on dimension or shape similarity index?

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I have a CAD design of a simple model that is being 3D printed. To evaluate the print quality we used optical microscopy images of the model and qualitatively decide on the printing quality. I need to make this procedure quantitative, but I am not sure which index, or algorithm to use. My main attribute of quality is dimension and shape similarity. I tried the structural similarity index (SSIM), but since I did it on gray scale images and sometimes the microscopy images are not identifcal in contrast and exposure the results were not convincing. So is SSIM good for what I want but with more care to image processing may be by comparing binary images rather than grayscale? or is there another procedure/index better?

Answers (2)

yanqi liu
yanqi liu on 26 Sep 2021
sir,may be use psnr、ssim、mssim、mse to make some compare

Image Analyst
Image Analyst on 26 Sep 2021
I'd probably threshold and use dice().

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