Legacy ImageMagick Discussions Archive

In case anyone is ever interested, my work-around for what I think is a bug in PerlMagick's Draw function for affine tranformations is to use the Math::Geometry::Planar module (cpan). You end up needing to convert any paths to polygons for the transformations. But I was able to rotate, mirror and mo...

$detail->Draw(stroke=>"red", strokewidth=>1, affine=>[$a1,$a2,$a3,$a4,$a5,$a6], primitive=>'line', points=>"$x1,$y1 $x2,$y2"); produces the results in the example image linked above. i've also tried this with the actual values for the affine with same results. affine accepts this...

RE: Paths, I'm very well versed with paths, thanks. I changed my test case to a line for simplicity. Re: array values, OK, I'll try other methods to populate the the array but you can see it accepts the input and rotates it ... sending it an actual array does nothing and I have not tried an array of...

Thanks for your reply -- after some further testing I found the problem isn't with ImageMagick, it's with my stupid assumption of how it should work. :) Rotate works as advertised. After realizing that, I adapted your affine_distort program but my results aren't quite right. I have a line from 300,1...

Hello, I'm having some trouble with Draw() with rotate or affine. I'm attempting to add a path to the end of line and rotate the path according to the angle of the said line: PerlMagick ImageMagick 6.2.8 10/20/10 Q16 file:/usr/share/ImageMagick-6.2.8/doc/index.html $detail->Draw(stroke=>"red&qu...

The best match score and location will be returned by the compare function. But you can also use the returned match score image to seek the max value. In both cases, the location will be the offset of the upper left corner of the smaller image with respect to the upper left corner of the larger ima...

Make a small image of something complex in the middle of the first frame, then look for that image in the next frame. I see what you're saying. In the case of automating that approach I won't know what is interesting. What if I were to take a crop of the center of the image and compare to the next?...

One for the experts: I'm trying to think of a way to analyze video and compose a single image, stitching the differences between every X frames together. For example, a camera is panning from left to right. I want to build a new stand alone image using frames from the video. The problem is, I do not...

I'm not sure. I think Gimp and Photoshop has from special filters for creating news print like screens. In IM it would be an artistic filter, and I have not even started to explore all those options (it is a masive set). Sorry for posting to an old thread -- but what are IM artistic filters? Google...

Use median filtering (or something like it, e.g. morphological operator), BUT create a mask first that separates the white pixels from the rest. Then composite the median filtered result with the unfiltered result using the mask, so that the non-white pixels are not filtered and the white pixels ar...

Looking for some ideas for the following: Analyze image pixel by pixel looking for white. If white pixel found, fill with neighboring color. I wrote a script that parses the text output from convert and accomplishes what I outlined above. However, as you might imagine, it is very slow to analyze a l...

Bad form or not, I'll reply to my own email -- I answered my own questions.

Turns out that the -segment option is what I wanted.

I think I have a good workflow; off to read more about the CLI to see if I can combine some steps and speed things up.

Thank again!

Luke

Anthony: thanks for the info -- I'm going to start a new thread per your suggestion and try to explain what the cutout filter does in IM proper terms. I think I'm close. Bonzo: if the process at http://vectormagic.stanford.edu/ was available to use with my own equipment it would be without a doubt p...

Hello ~ I too am looking for some advice to replicate the photoshop cutout filter. I realize this thread is pretty old but I was hoping to luck out and get some helpful hints. I spent the last four hours or so having a go at a variety of techniques listed at http://imagemagick.org/Usage/ with not to...