Questions tagged [imagemagick]

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10
votes
3answers
1k views

What properties of an image could be used to programmatically discard it as “bad”?

I'd like to have a quicker review process of my photos when I dump them from the camera to the computer. Surely there are some parameters that I can extract programmatically from the photos and this ...
7
votes
2answers
9k views

How can I get a uniform white balance on a batch of JPEG images?

I have shot many photos of the same subject in JPG. Since I have shot for many hours with different light conditions the white balance is quite different for all the shots. I would like to ...
5
votes
1answer
1k views

Is there a quality difference between Lightroom and ImageMagick when converting RAW to JPEG?

Is there any quality difference between ImageMagick and Lightroom, when converting RAW files (for example, CR2) to JPEG in 100% quality?
5
votes
2answers
59 views

Image Magick - altering colour levels automatically

I've been tasked with finding a way to automatically crop and colour adjust product images. The images are on a white-ish background with somewhat inconsistent lighting. Manually, we'd use photoshop ...
3
votes
2answers
965 views

How to auto-trim solar eclipse photos?

I've got a few hundred photos of the November 2012 eclipse, and I'd like to compose them into a time series. To do that, I'd like to crop all of them to the same size, a square with a little space ...
3
votes
1answer
377 views

Homogenize exposure brightness and white balance

I've taken thousands of photos on a long-term project and I'm doing a time-lapse film. Due to the different weather and the different light conditions the pictures are partly very differently exposed....
3
votes
1answer
55 views

Is it possible to use imagemagic to build a composite image from multiple photos of a moving object?

I frequently have 10 photos taken from a tripod mounted camera, of an object moving across the field of vision. I know I can painstakingly combine these in PhotoShop/gimp to create one composite ...
2
votes
1answer
526 views

Can I use Imagemagick to unrotate Canon RAW pictures in batch?

I’d like to use Freds unroate script to unrotate a bunch of Canon *.cr2 RAW files and keep them in the RAW Format. I’m able to use the script as a batch file for a folder of jpgs: for pic in *.jpg; ...
1
vote
1answer
894 views

Gimp or ImageMagick: Adjustable kind of equalize?

Sometimes, I shoot pictures that are badly lighted (e.g. very dark areas, while part of the picture is well exposed). In some instances, equalizing the pixels can do real wonders. But is there also ...
1
vote
0answers
23 views

Differences between ImageMagick and GraphicsMagick's defaults for the convert utility

I'm using convert to apply an HCLUT on an image. ImageMagick and GraphicsMagick both work, and both outputs have the same resolution, pixel density, metadata, etc. Howerver GM's output is a lot ...
1
vote
2answers
580 views

How to extract depth map from .heif image created with iphone X using imagemagick

i created an image with my own iPhone app. The image is in .heif format and it contains the depth map. (i know this because the Photos app recognizes it) I now downloaded and installed imagemagick. ...
0
votes
1answer
81 views

Does ImageMagick export PNG faster than Photoshop?

I regularly batch export images from Photoshop using the Image Processor Pro add-on by Russell Brown. I export a folder of Photoshop files into 6 formats: 3 different resolution JPG and 3 different ...
0
votes
2answers
589 views

Why does the result of Photoshop Curves and Imagemagick Curves differ?

When using imagemagick to apply curves (convert -function), the output differs from the output when I'm using a curves adjustment layer in Photoshop. What is the reason for this difference? I'm using ...
0
votes
2answers
78 views

Finding the correct color settings to convert a NEF file to TIFF using UFRaw

I'm taking photos of some (positive) slides to digitize our family collection. I use a Nikon D5000 which I use to shoot both in JPEG and NEF formats. Here is an example of the original JPEG photo shot ...
0
votes
2answers
922 views

Best Unsharp Mask settings after resizing photos for imagemagick

I'm resizing photos uploaded to a photography gallery and have thus applied an unsharp mask to attempt to preserve the photos original sharpness. The settings I use are: radius: 0 sigma: 0.5 amount: ...
-1
votes
1answer
4k views

Remove all metadata from PNG, commandline [closed]

I'm trying to create really small PNG thumbnails from JPGs using GraphicsMagick. gm convert coolphoto.jpg -resize 16x16 -colors 6 coolphoto_16x16_6color.png These get down to 342 bytes, but they ...