Legacy ImageMagick Discussions Archive

I'm not sure what you mean by "so that I can visually see the 16 bit depth". Maybe an example of something you have tried would help.

First check out -type (usage examples). Additionally Converting Color to Gray-Scale, -colorspace, and -profile may be informative.

A +distort shouldn't be necessary. You just need to place the -rotate in the correct position. It should be after the image-to-rotate is read (the corner), but before the -geometry and not-to-rotate image is read.

Since you are in a hurry, I'll throw out ideas. Hopefully someone can help you with fonts in particular. There was a recent post ( ImageMagick Perform differently under different os ) concerning inconsistencies of a different sort. Maybe some help there? My first thought is to make the text too larg...

If you have very specific needs not covered by the above, and can express these needs mathematically, check out -evaluate and -fx.

Does -colorspace or -gamma meet your needs? If not, more clarity on your needs would be helpful.

fmw42, I was unaware of that PNG limitation, so thank you for the warning. I've also read somewhere that -clone must be used in parentheses, but I haven't (yet) had problem with that either.

You give the impression that at least one of your images has an alpha channel, but I think you mean that you would like a grayscale image to be used AS an alpha channel. convert image.png mask.png -alpha off -compose copy_opacity -composite PNG32:result.png http://img5.glowfoto.com/images/2010/11/23...

I can think of two options to add an alpha channel: convert in.png -alpha copy out_1.png convert in.png +clone -alpha off -compose Copy_Opacity -composite out_2.png But these probably give you the opposite of what you want, just negate if needed: convert in.png -alpha copy -channel A -negate out_neg...

Is the size of result.jpg always exactly 2 bytes more using suse-linux?

Isn't the newer syntax "convert 102.jpg -scale 500X500 result.jpg"? Not that this is likely your issue.
http://www.imagemagick.org/Usage/basics/#why

Do you have this problem when using a lossless image file format, like PNG instead of jpeg?

All together now: convert original.jpg -modulate 120,120,180 changed.png convert original.jpg -fuzz 50%% -fill white -opaque blue -threshold 99%% mask.png composite changed.png original.jpg mask.png a.png Broken into steps so that you may examine the intermediate images. Change -modulate to whatever...

*it's not always the same area of image, so I can not use composite... The area of interest changing means you can't use a fixed mask, but you can generate a mask for use with composite. Something like: convert original.jpg -fuzz 50% -fill white -opaque blue -threshold 99% mask.png I don't know, bu...

I'm not sure that answered all my questions of your need. I'll assume that with your original and modulated image, every area is what you want in at least one of them. One option is to -composite your original image and modulated image together using a mask. See: http://www.imagemagick.org/Usage/com...

With a smallish, fixed number of images, or with a large or varying number of images? Say your 1-dimensional measure was graylevel. Do you want your resulting image to be those graylevel values, or the color values that gave those graylevel measures? The former MAY be easier, and definitely would no...

Are you trying to increase the brightness and saturation, but only in the areas of the image with a blue hue? I'm still not clear on your intent. When you gave "-fuzz 50% -fill orange -opaque blue" as an example, do you mean that this makes the area you wish to -modulate orange? When you d...