Questions tagged [color-correction]
The process of making an image appear natural to the eye, either by changing the lighting or by changing the white balance or tint of an image after the fact.
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How to use a Xrite Colorchecker on a specific image to get the right colors?
I installed a setup, and I shot three photos with the same f/1.7 1/100s ISO100 condition:
A.jpg (download link): Colorchecker alone
B.jpg: Colorchecker + object
C.jpg: the final object I'm ...
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Vintage vs modern B&W photography techniques differ in color luminance - what's going on here?
A co-worker of mine was trying to identify a film clip of a ticker-tape parade, and was thinking it was a parade from WWII in Italy (celebrating V-E Day), because the clip showed a tri-color flag with ...
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How do I cope with haze for the photos containing sky and trees at a distance?
I'm always struggling with photos which contain large zones with trees situated far away from the camera. Haze and pollution cause severe changes in colors, which means that the trees lose their ...
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What color photo filter should I use to offset a heavy magenta cast on my color slides after digitizing?
I am in the process of digitizing a large number of slides. All of them have a heavy magenta cast to them.I have been using photoshop to attempt correction but with limited success. The ones that I ...
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Black level correction for images
As I have figured, the main cause for the intensity values in an image to be non-zero even in the absence of light is the dark current which propagates through the photodiodes, providing some charge ...
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Why does the imported JPEG from my Canon Powershot G9X Mark II on PC screen differ quite significantly from the camera display? [duplicate]
Consider the attached sample images. I took them circa 4:50 AM and 3:50 AM, respectively. On the Live View display of the Powershot G9X Mark II, they were full of light.
The pictures were taken as ...
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Why is my photo partially colour imbalanced?
I have this photo where part of it is funnily colour imbalanced. I took some product shots under couple of 5500K lights. Part of the product was navy blue and it is appearing as black in the raw files....
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Remove color cast in darktable?
I'm playing with Darktable, coming from Photoshop, and though I really admire most of its features, there is one thing I cannot seem to wrap my head around.
In Photoshop, I can easily remove color ...
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How to stop my camera from exaggerating differences in skin colour?
The skin colour of my subject is widely inconsistent and I am not sure what the reason for it is. To me it looks like the side of the face suffers from a colour shadow thrown by the bright hair. At ...
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How can I desaturate reds in post-processing using Rawtherapee (or Gimp)?
I took a few artwork pictures in sunlight. I used Rawtherapee's pipette to find a white balance I'm happy with, but the red are overbright.
How can I desaturate reds only ?
I had some success ...
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How to correctly apply gamma to linear raw files from a machine vision camera?
I am using a machine vision camera that, according to the manufacturer, produces linear pixels. As a result, I need to apply a gamma correction to the image before I can view the result. However, ...
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Why would a camera change colors on the image when producing JPEGs?
There's a room with windows closed by curtains, it's night outside and the only light source is a set of LED filament lamps inside the room. Lamps are designed to have 2200K color temperature to have "...
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Linear regression to correct the colors of RGB images?
I have several pictures of plants (tif files). Each picture contains a set of Munsell color chips. The "true" RGB values of the Munsell color chips are known. My goal is to correct the colors of the ...
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For analog color printing, why does a diffused projected image "average" to gray?
In analog printing color negative film to RA-4 paper, one approach is to project the image to the easel, place a diffuser in the light path, and then place a filter calculator (an array of filters of ...
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Matching color of HDR panorama
For normal images color checkers can be used to correct images that the color representation is euqual.
How is it done with HDR images? How can color checker board measurements be included in the tone-...
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