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Questions tagged [imagemagick]

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0
votes
1answer
144 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. ...
2
votes
0answers
441 views

Applying HEIF depth map with ImageMagick

As you probably know, HEIF images support a "depth map", which is an extra channel where information on blurriness is stored. In Photoshop, it looks like this (with the RGB channels hidden) When ...
3
votes
0answers
175 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
53 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 ...
1
vote
1answer
461 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 ...
2
votes
1answer
406 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; ...
0
votes
2answers
469 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 ...
-1
votes
1answer
1k 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 ...
8
votes
3answers
792 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 ...
6
votes
2answers
7k 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 ...
0
votes
2answers
801 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: ...
3
votes
2answers
917 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 ...
4
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?