deskew:auto-crop= true, auto crop the image after deskewing. delegate:bimodal= true, Specifies direct conversion from Postscript to PDF. distort:scale= value. The documentation page doesn’t include an entry for “%[deskew:angle]”. I suggest. Hi, I’m want to extract street signs from photographs and deskew them, but I don’t know where to begin. Deskewing I believe is the easy part.

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Remove Black Borders and Deskew Questions and postings pertaining to the usage imagemwgick ImageMagick regardless of the interface.

Usage questions are like “How do I use ImageMagick to create drop shadows? I want remove black borders and deskew, but exists a lot of different kinds of images layout and sometimes the result it’s deskkew the expected. I use this code in all images. I’d like a way to remove the black edges of the 2 imagems without any loss of content. Add a black border 2px wide then use -floodfill white using the pixel at the corner. ImageMagick examples mostly using php Imagick examples.

I think you have all the pieces in your command except the initial -border white -border 2it just needs to be rearranged. In example 1, part of the text image, take in the black border and is erased together.


Deskew option makes output image smaller than original – ImageMagick

That will mean that floodfill will creep into the image imagemahick change all black that is connected to that part of the signature to white. I am not sure how to deal with this automatically, since your image is rotated and has a black background.

If you scan against some other color. Alternately, you have to manually add some white imagemagicm at that point where the signature hits the edge of the page.

This was my simple test, which shows it fails after the floodfill convert a. The above is Unix syntax.

Last edited by fmw42 on Thu Nov 08, 7: This seems edskew work reasonably for me without having to manually erase a small part of the signature at the bottom edge. If I use the first code, works in example 1 image, the signature don’t disappears, but not works in example 2, and the black area not disappears.

Select all convert b. Unless you can somehow keep that from happening, you will not get ikagemagick results you want.


You somehow need to put a white border around the white part of the image to keep any black text from reaching the edges.

That means it must be there when you scan the image. My only suggestion is to scan against some other colored background that is not white and not black.


Try not using -set option: But I am sure that will not help as that is essentially what I did in my example above.

You could install Cygwin and try my script, textcleaner. This is the result. But I included it for more flexibility. So in Windows syntax, this would imagemaigck removing the extra tmp files.

I have added another trim at the end to make the result a bit smaller. I have apreciated your spent time to resolve my problem.

And the option to erase manually the signature where touch on edge is impossible, because remove the originality from document, if my client to need the document to some juridic process, loses the originality and to be different from imavemagick original paper. I think is impossible to do what i want in automatic form.

Last deskfw by PhilipeGatis on Fri Nov 09, 8: Alternately, you can make a small white frame to border you documents, so that you can scan it and be sure that there is white about the whole document on a black background. Have you tried scanning with a white background?