Legacy ImageMagick Discussions Archive

If you do any processing such as adjusting levels, you probably want to ensure exactly the same processing is applied to all the frames. Thanks, but since there is so much variation in the photos, can you do the same processing? I was thinking about using Lightroom or similar, apply some auto ...

Not sure what caused the dark sky, but now its working. Is it feasible to use dng-files directly? Would be less files to keep track of and possibly some win in quality? But alot slower, and to look good the dng-files need some values applied. Possible to edit dng in lightroom or darktable and use ...

Thanks, got the floats working. Now composing one image over another, and use a mask to cover the sky of the second image. convert "$file" tempBot.miff "$masksky" -composite -format +repage outcomp2.jpg There is like a shadow over the sky. Its a bit darker than the original, though there should be ...

Thanks, lots of things to learn.. I am not getting anywhere with floats in bash. I can store the chroma, but not compare them refchroma=$(convert "$refimg" -gravity North -crop x50%+0+0 +repage -colorspace HCL -format "%[fx:mean.g]" info:) chroma=$(convert "$file" -gravity North -crop x50%+0+0 ...

Makes sense, thought I'd give saturation a go but bash seems to hang from the following?

Thanks! exiftool -b -PreviewImage -w _preview.jpg -ext dng . in case someone googles here, the above worked for doing a batch in the same folder and naming them as the dng + _preview. It threw an error also: "Error: File format error - ./.__filename.dng" but the previews are available. I am looking ...

Is it possible to do "identify" on the embedded preview of a dng.file? To speed up the process? Shells are often bad at handling floating-point. Either use a calculator like bc, or do more calculation within IM, eg: identify -format "%[fx:mean>0.345?1:0]\n" filename This returns 1 when the mean is ...

Ok, thanks. Also found this:
https://github.com/aheckmann/gm
But not getting anywhere with it

The scripting is getting a bit cumbersome for me and I am thinking about trying imagemagick using another language. Took a look at python and wand but it does not seem to support many functions (though I gather you can work around it). Is it possible to recommend another language? I do not know any ...

Terrific! One step further.
Out of curiosity, what is the PS equivalent to this? If there is any?

This is great! But unfortunatly I am not much of a scripter. Especially the environment variables give me a headache. Thought I'd start by just calculating the gain and bias for all channels and applying them to another photo. But dont know how to apply them? #!/bin/bash mean1=$(identify -format ...

Magick! Never really thought about the statistics, but all seems logical, great explanation!
Will see if I can put something together tomorrow.

Two examples in the dropbox-links below (cant seemt to include images?). Since the photos are taken with such long interval there are alot of changes like this or more.
image1
image2

Thanks, will put up some frames shortly. The interval is 1 hour. I think I should do a heavy selection skipping lots of photos. Then see if its possible to make the remaining more similar by editing. Your "Gain and bias" looks interesting.

Thank you both! I belive I have got this part working. So I am able to sort out those that are too dark.
Any other tip to find images that cause a video to seem flickery? Quite alot of changes in weather.