All Questions
Tagged with imagemagick image-manipulation
14
questions
2
votes
1
answer
384
views
Best ImageMagick parameters to upscale image containing text
What are the best ImageMagick parameters to upscale an image that contains text in Latin alphabet?
Take this image as example:
I did some experimenting, for example:
magick convert in.png -filter ...
- 421
2
votes
1
answer
1k
views
ImageMagick Mogrify Compress Images Recursively
Windows 10. ImageMagick v7.1.0-62
I need to compress and optimise a lot of .jpg images using ImageMagick. I am using the following command, which is working (this overwrites the original files which ...
- 231
1
vote
1
answer
1k
views
How do I properly downscale an image from 300 dpi down to 72 dpi using imagemagick?
As the title says, I want to know the proper way to downscale my image that is originally 300 dpi down to 72 dpi while still maintaining the same quality of the image.
By quality, I don't mean the ...
- 685
0
votes
1
answer
210
views
Can I encode a PNG image losslessly to another format and decode it back into an identical file?
I am archiving roughly 150gb of PNG assets. In an effort to increase the compression ratio of the images, I am trying out FLIF (Free Lossless Image Format). This provides an excellent compression ...
- 139
7
votes
3
answers
9k
views
mogrify - how do you recurse through subfolders in Windows
I thought there was a simple switch in mogrify command options that tells it go through subfolders as well. I didn't find any. On Linux, the "find" command seems to do the trick, how do you do this on ...
- 855
1
vote
1
answer
318
views
ImageMagick convert: Placing text on a book cover
I am trying to make an eBook cover via ImageMagick, to be incorporated in a larger project after it works.
I want to get to geometry and gravity later, but at present I have two relevant images:
A ...
- 963
5
votes
3
answers
5k
views
Trimming exterior empty space with ImageMagick does not work on scanned documents
Given an image that has some actual content inside and usually some unwanted white or black or transparency around that, I would like to trim or crop the exterior parts using ImageMagick.
The ...
- 208
1
vote
1
answer
10k
views
Fixing corrupt PNGs missing the IEND chunk
I have .png files outputted by a tool that converts .emfs to .pngs but that doesn't add the IEND chunk to the end.
Therefore, other tools, like ImageMagick, won't go near them as they detect them as ...
- 231
9
votes
4
answers
12k
views
Creating and splitting large multipage TIFF images
I need to both create and split multipage TIFF images, ranging from 2 to almost 100 pages (A4, 300 dpi, 2500×3500 px). The job is performed periodically by a script on an x64 Linux server. Currently I'...
- 248
1
vote
1
answer
140
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 ...
- 13
3
votes
1
answer
3k
views
GraphicsMagick error reading PNG file
When trying to read a large PNG file, GraphicsMagick command
gm convert pallaso1.png pallars-sobira.jpg
just displays this error
c:\progs\GraphicsMagick\gm convert: Read Exception (PALLASO1.PNG).
...
- 716
0
votes
0
answers
713
views
Comparing two images: get the XY location of any differences found
I'm trying to compare two images using the ImageMagick Compare module; everything seems okay, but I want to know the exact XY locations of the 'differences' found. How can I get this?
I already ...
- 101
36
votes
8
answers
35k
views
Square thumbnails with ImageMagick (convert)?
How to create square/cropped thumbnail using ImageMagick ? Cropping like below.
- 3,591
7
votes
3
answers
8k
views
Resizing and cropping images to 6x4 to width of 1024
I have a mixed set of images, each one having a slightly different resolution with a slightly different aspect ratio from the other images.
I have tried using commands like:
convert -resize
and:
...
- 1,740