Imagemagick is a cross-operating-system bitmap manipulation software package, run from commandline and programmable through a variety of programming languages.

learn more… | top users | synonyms

1
vote
0answers
23 views

imagemagick convert: changing color profile

I use the imagemagick convert command to create thumbnails for the web from large images. convert y2.psd[0] -resize '80x40' y2.png Some images uploaded by a customer are CMYK Photoshop files with ...
2
votes
2answers
38 views

Gimp 2.6.12: modify alpha channel while preserving color

This is for a video game in which a specularity mask is in the alpha channel of the normalmap. I need to create an image where the alpha value for some pixels are 0 (to indicate no specularity,) but ...
1
vote
1answer
39 views

ImageMagick; how do I make a series of PNGs transparent?

I've installed ImageMagick on Windows 7 64-bit and I'm wondering how I can convert a series of PNGs to transparent PNGs in a timely manner (I have 180 PNGs to convert, so yeah I can't exactly do them ...
1
vote
1answer
83 views

Nearest neighbour interpolation not working in imagemagick

I want to display an image and have the pixels big and clearly visible. As it's common to display scaled image with some form of smooth filtering, the best option is to scale up the image resolution ...
0
votes
0answers
32 views

Clipping mask filter

I am trying to write some text, using imagemagick, on another image but I want some pattern on letters. Writing on image is easy. But I have no idea how to put that pattern :(. This is an example ...
5
votes
3answers
269 views

Using imagemagick to create vibrant images

I'm in the process of helping out a friend who has a bunch of inventory pics. Most appear faded/washed out, and generally dull. I really like the effect as described here: ...
3
votes
2answers
375 views

How to correctly using potrace (CLI) to trace bitmap

I was trying to vectorize a .png. I found a utility (which is incorporated into InkScape), the potrace. If any of you knows how to use potrace, kindly teach me the right way to get sharp output. ...
0
votes
0answers
92 views

Conversion from svg to png creates certain pngs with black fields in them

When I converted several Inkscape .svg files to png using inkscape or mogrify (imagemagick) from the command line //inkscape from the command line conversion cd your-directory-with-the-svgs/ for i in ...
1
vote
0answers
59 views

Rescale an image on a log scale

I'm trying to rescale a map based on a log scale (so the first inch is about a mile, the second inch is two miles, the third is four miles, etc.). To complicate things, I would like this to be radial, ...
1
vote
1answer
154 views

Maximizing saturation while converting CMYK to RGB

I have many designs prepared for print (CMYK), but now I need to present them on a projector. As projectors go, I know most of them have weak contrast, and many of my colors wouldn't be as accented as ...
18
votes
9answers
7k views

Is there any way I can add watermark to .jpg files (around 15000), en masse instead of one by one?

I have around 15000 .jpg files that need to be watermarked. Is there any way to process these images en masse to add the watermark?
0
votes
0answers
160 views

Replace color for all layers

I have a file with about 500 layers, and I need to replace a color in all of them. I looked through different solutions here and elsewhere, and they all suggested using an adjustment layer or ...
2
votes
4answers
12k views