17
votes
Relationship between tint-temp and magenta-green-blue-amber white balance corrections?
Tint is the green-magenta axis, temperature is the blue-amber axis.
- 1,396
15
votes
Photoshop's color replacement tool changes to grey (instead of white) — how can I change a grey background to pure white?
Graphic Design Stack Exchange: How to cut how hair accurately
Advanced hair extraction tutorial
First off, plugins and simpler methods are available. This is if you want to get higher quality results.
...
- 2,447
15
votes
Remove color cast in darktable?
Within the white balance module you can select "spot" from the preset drop-down list to remove color cast based on a selected area. By default, the entire image except for a margin around the edges is ...
- 5,374
13
votes
Accepted
Photoshop's color replacement tool changes to grey (instead of white) — how can I change a grey background to pure white?
The color replacement tool isn't working for you because its default mode is "Color", which changes hue and saturation, but not luminosity (brightness/value). That's why you get the blue or the gray→...
- 142k
11
votes
What do I need to photograph paintings with accurate color?
The gear actually isn't as important in your situation as the workflow to preserve color accuracy. The main issues you'll need to consider are:
Accurate white balancing when shooting. This typically ...
- 50.7k
11
votes
What's the correct term when a photo is over saturated?
Another relevant term is Clipping, see: https://en.wikipedia.org/wiki/Clipping_(photography)
Images exhibiting Clipping will often show areas of solid white, but it can also mean that any specific ...
- 909
9
votes
Why do SLRs and DSLRs use different flash gels?
I tried hard to find a source for that information, but no luck. However, it doesn't sound right to me because the idea behind putting a gel on a flash is to alter the light to match the ambient, be ...
- 33k
9
votes
Sony DSC-RX100 gives unnatural (depressive) colors
I see no problem at all with any of the images you linked to.
I suspect the actual problem is how your display is adjusted.
I'd suggest you try this page and see how that works.
The sample you ...
- 6,385
9
votes
Vintage vs modern B&W photography techniques differ in color luminance - what's going on here?
Just to expand on Matt's answer a bit.
Most B&W films used during the first half of the 20th century were not panchromatic. They were much more sensitive to the energy in blue light than the ...
- 173k
8
votes
Color issue: studio images have a pink hue
No. Don't try gels.
Your camera should have a custom white balance setting. Something like this:
You need a 3 step process for this:
1) Take a photo of a white object using either Sun White Balance ...
- 22.4k
8
votes
What do I need to photograph paintings with accurate color?
I used to work as an assistant to a guy who shot accessions for the Corcoran Gallery in DC. He used a standard copy photography lighting technique with two Lowell D (now DP) hot lights reflected out ...
- 511
8
votes
Accepted
Why color-wheel websites (Adobe...) claim these colors are complementary
Not all color wheels are alike. The traditional/old school RGB color wheel (like Krita's) begins with the three primaries at 120˚ intervals; which places red opposite cyan, such as this wheel.
...
- 12.6k
7
votes
Accepted
How can I achieve consistent skin tones in my photographs?
The short version of the answer to your question is that you do it both "in camera" and in post-production.
A longer answer breaks out into a few thoughts:
In Camera
Light the subject ...
- 33k
7
votes
Gimp's color options not working
I have been having this problem too in GIMP 2.10.18, and finally figured out what's happening. I had the layer visible and highlighted, but the curves are adjusting the RGB channels. That means that ...
- 71
7
votes
Accepted
How to match colors between pictures?
The first step is to observe. The main diference is a slight color on the first image.
Method 1
Technicly that is a duotone, it is the easiest way to work it anyway.
1) In Photoshop, convert the ...
- 22.4k
7
votes
Accepted
Pictures of a dark violet flower appear light blue. Is this a lens or a technique problem?
The flower is supposed to be dark violet, but it's come out light blue.
That indicates the image is overexposed. If the flower is dark, the image of the flower should be a similar tone. So for a ...
- 33.3k
7
votes
Pictures of a dark violet flower appear light blue. Is this a lens or a technique problem?
Despite you saying that this does not happen with 55-250mm objective I claim that this is the problem with camera settings. If you finally upload the photograph made with 500D and 55-250mm I may ...
- 4,159
7
votes
Why would a camera change colors on the image when producing JPEGs?
Visible color of an object looks like something objective — if it looks yellow then it looks yellow, why change it in the first place? I just don't see how this color alteration is useful.
This is ...
- 142k
7
votes
Why does Lightroom not have a cyan-red slider for color correction?
If you look at any color wheel, you have two axes on the wheel:
To correct any color cast, this is usually enough. You can correct the main source of color shift in natural light on the temp axis (...
- 3,846
7
votes
Will a CTO (or CTB) Gel improve the CRI of a light source
Filters don't add anything, they only attenuate (reduce) part of what is already there more than they reduce other parts of what is already there.
If the light source has a low CRI due to missing ...
- 173k
6
votes
Correcting severe cyan colour cast
Sadly, there's not much useful color information in the pictures to work with. This is probably not remotely the answer you were hoping for, but...
Being a fan of the old tinted postcard look, if ...
- 5,374
6
votes
Why are high white balance temperatures redder when warmer objects are bluer?
The Why Different is just a difference between physics and art. The "temperature" simply is the actual color of black bodies when heated high (Like steel in a furnace). They do first glow red, and ...
- 12.8k
6
votes
Vintage vs modern B&W photography techniques differ in color luminance - what's going on here?
Photo films and digital sensors do not record colors exactly as seen by our eye / brain vision system.
Initially, photo films were only sensitive to the violet and blue region of the visual spectrum....
- 38k
6
votes
Will a CTO (or CTB) Gel improve the CRI of a light source
Someone is going to come along with better 'numbers' for this, but imagine the Histogram of a picture of a clown in a flower garden.
Then add a slope [filter] to that histogram.
You still have a very ...
- 22.1k
5
votes
What causes color imbalance, and how does it relate to chromatic aberration?
These concepts are almost entirely unrelated.
Color balance, or white balance, is generally a global correction meant to compensate for the characteristics of the light in the scene, to make it ...
- 142k
5
votes
What do I need to photograph paintings with accurate color?
Some general recommendations.
1) The resolution of the file.
You need at least 150 ppi for this. At 3 ft you need 3x12x150=5400px on the long side. So you need a 24Mpx file at least. (The ...
- 22.4k
5
votes
How to restore color of wood photographed under fluorescent lighting?
Try to use a color checker... oh, too late now.
Or try to shoot in raw... oh, to late now too.
Try to setup a specific white balance... oh, to late now.
(Sorry for puting lemon in the wound n_n )
...
- 22.4k
5
votes
Accepted
How to embed two ICC profiles in an image?
Usually, there's no reason to embed more than more one profile. With an input image, you embed the input profile, so that your colour management system can work out what colours the numbers in the ...
- 3,003
5
votes
How to edit photos shot in fluorescent light
In addition to setting both the color temperature (blue←→amber axis) and tint (green←→magenta axis) I also often use an HSL (Hue-Saturation-Luminance) tool to remove or minimize remaining color casts. ...
- 173k
5
votes
Accepted
What causes blue tint of my photos and how to get rid of it?
On fair days the world is illuminated by a combination of sunlight and skylight. On overcast days, the world is illuminated by skylight only. Now skylight is very blue thus images reproduce with a ...
- 38k
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