Legacy ImageMagick Discussions Archive

Yeah, I've already corrected it. I had to test whether the results came back the same, anyway, and I only have the one instance, so it's not onerous to get it right.

Thanks, snibgo, that should save me hours of trial and error later today! Your "-level" syntax is wrong. The docs http://www.imagemagick.org/script/comma ... .php#level say the elements should be separated by commas, not slashes. Somebody should tell IM, then, because slashes work! (I looked up the ...

Heh. I actually did use Windows syntax (i.e. I took the "\" off the end of each line to make it one long command), but edited it back for the post so that it didn't need a horizontal scroll bar.... I hope that doesn't mean some of the stuff in the middle that I don't quite understand (e.g. the ...

OK, that was a little hard to parse, but I think I got there in the end. That result looks pretty great. I fiddled just a little, and am now using: magick "image_0.jpg" -background "gray(60)" -deskew 40% +repage -write mpr:img \ -morphology open octagon:2 -fuzz 35% -set option:cropbox "%@" +delete ...

This is an image that gets cropped poorly: https://www.dropbox.com/s/hzufilf9ndz2tuq/E10250_0.jpg It's that speck up in the top left that messes with the result. I figure it'd be better to worry about the problem of too many Hough lines once actually having too many Hough lines is the problem—and t ...

Well, that's disappointing: this single (if lengthy but elegant) line of IM script worked well on exactly one image before I hit problems again. The next image I tried has a little piece of white lint on the black background, and of course it gets included as part of the image worth keeping, so the ...

Ooh! That's definitely better. Going to play around with this....

Thanks for persisting with me!

I have now. Adding "-fuzz XX% - trim +repage" seems to do either nothing or almost nothing (fuzz = 1% to 87%), something—but not the right thing (fuzz = 88%), crop the whole image file except for a line segment of width 1 pixel (fuzz = 89% or 90%), or even crop everything except for a single pixel ( ...

Well, dammit. Thanks very much for the code snippets, but I think I'm just about officially way out of my league. I can just barely follow the batch file, but I have serious doubts as to my ability to synthesize a complete solution from even the copious code chunks that do the heavy lifting ...

I did even more searching, and this is not the first time this type of problem has been asked about and only sort of half-answered (see also https://www.imagemagick.org/discourse-server/viewtopic.php?f=1&t=28434 , in particular). I don't suppose there's a solution out there someplace that actually ...

That code worked pretty well on a few more test images, actually, despite the sub-par background. I tried larger values of fuzz, and that didn't work as well. Smaller values seemed about the same. Deskewing seems to be rock-solid. But overall, the strategy doesn't seem to do what I would do manually ...

Here are a couple of examples that I processed manually: Original files: https://www.dropbox.com/s/2i052ek34f0v5lt/Sample%201%20-%20G82217_01_Original.jpg?dl=0 https://www.dropbox.com/s/ch1e0u70q8umgjn/Sample%202%20-%20G82251_01_Original.jpg?dl=0 Deskewed using IM: https://www.dropbox.com/s ...

I'd like to deskew and auto-crop several thousand images of postal covers on a black background. Ideally, I'd want all the processed output images to be the same pixel dimensions. The deskewing I've figured out from other threads: magick convert g82217.jpg -deskew 40% g82217_deskew.jpg works ...