1
vote
1answer
31 views

Resize/crop multiple files while preserving certain areas?

I have 176 JPEG images that are 450x800 in size, and was wondering if there was a way to essentially resize them, but while preserving their content in certain areas (currently I'm only hoping for the ...
0
votes
1answer
175 views

Use GIMP color curve with ImageMagick

I created a color curve with GIMP. It looks like this: ~/.gimp2.8/curves/selphy (Just the first lines) # GIMP curves tool settings (time 0) (channel value) (curve (curve-type smooth) ...
12
votes
3answers
11k views

I want to change DPI with Imagemagick without changing the actual byte-size of the image data

I feel so horribly sorry that I have to ask this question here, but after hours of researching how to do an actually very simple task I'm still failing... In Gimp there is a very simple way to do ...
1
vote
2answers
395 views

Any way to make two images the same size and/or aspect ratio in ImageMagick?

Suppose I want to have two images side by side in a slide but they are different sizes. I know I can use "mogrify" and "convert" and all that to resize them, but it's a pain to type in the exact ...
2
votes
1answer
322 views

how to change the color that's used for transparency automatically, or programmatically?

For every picture (e.g. bmp, png), a transparent point actually does have a color The transparency is either defined by alpha channel mask (e.g. in PNG) or one of the colors is defined as ...
2
votes
2answers
4k views

What tool can be used to blur images?

Preferably something in paint, or some other built in tool, and definitely free. Does not need to be fancy, just what amounts to smudging the text in an image.
7
votes
3answers
8k views

Command line to automatically crop an image?

By using Gimp's menu, you can automatically crop the image (removing white borders). I have a lot of images with white borders of different sizes. I want to remove them using Gimp in command line but ...