Legacy ImageMagick Discussions Archive

Taking http://85.25.147.10/output.png as the desired result, purple letters on a white background, I get that result using ... convert icon.png -alpha off -fill #93117e -colorize 100 -alpha on output.png ... for a variety of versions, including 6.6.0-8, 6.7.9-6 and 6.8.6-0. Note that "-colorize...

Confusingly, two threads have been started on this topic, under "Users" and "Developers".

Can a moderator merge them?

Confusingly, two threads have been started on this topic, under "Users" and "Developers".

Can a moderator merge them?

I said earlier: "Hue: 100 + 96.6 - 31.4 = 165.2". I think that was wrong. From http://www.imagemagick.org/script/command-line-options.php#modulate : Hue rotation: 0 means -180 degrees, -50% of full circle; 100 means 0 degrees, 0%; 200 means +180 degrees, 50%; 300 means 360 degrees, 100%. I...

Yes, 6.6.0 is very old. I suggest you don't use it.

I happen to have a copy of 6.6.0-8, and it gives the same incorrect values that you found. It gives correct results if I don't convert to Lab and back.

That's good. "-compose CopyOpacity -composite" will use the mask's opacity, if has opacity. If it doesn't have opacity, it will use the tones to create opacity. Using "-alpha off" switches off any opacity (if the file has any), thus forcing "-compose CopyOpacity -composite&q...

That image, with RGB values about 2%, must be very dark on the left. Put it up somewhere, if you like, and I'll take a look at it. The image I am using is the one linked to in your second post, "This is a sample texture that features the boundary. The end result should be all green, the same to...

I don't use Unix so can't help you with the script.

You probably need to write a script. This would read the image size, and set the new size as needed (although I'm not quite sure what you are trying to do).

What is your platform: Windows, Unix, Mac or other?

Yeah, I also get a thin blue line, which means slightly too many [EDIT: I mean too few ] pixels are considered part of the right side. Try "-threshold 1%" instead. Sorry, I missed out the first vital bit of code, the bit for "I find the average RGB value for the left side." rem F...

Many possibilities. For example, here is a Windows script to position the text at offset (150,100) from top-left: %IM%convert ^ in.png ^ ( -size 1000x1000 xc:None ^ -gravity South -pointsize 200 ^ -annotate 0 Hello ^ -resize 10%%x100%% -trim ^ -repage +150+100 ^ ) ^ -layers merge ^ out.png

I'll also mention that I find the metadata very useful when reviewing my photographic technique. Modern cameras have many controls -- aperture, shutter speed, ISO, exposure compensation, meter modes, auto-focus type (although I rarely use auto-focus), white balance, flash settings -- and when a pict...

It works for me. IM v6.8.6-0 in Windows 7.

What are you using?

For the mask, the following works. I find the average RGB value for the left side. I blur because I don't care about difference in fine detail -- detail doesn't determine if a pixel is on the left or right. For each pixel I find the differencee in hue and saturation between the pixel and this averag...

When processing raw photos, I use ISO to determine noise reduction, and white balance to (possibly) determine white balance, and the lens ID to determine geometric distortion and chromatic aberation.