Lunch atop a (Springfield) skyscraper

Lunch atop a (Springfield) skyscraper
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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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26
votes
4answers
951 views

What are Color Profiles and where would I find information on using them properly?

I see the term "Color Profile" a lot and I have this vague idea that it helps you adjust color values based on the unique differences of both cameras, displays and printers from some ideal device. ...
19
votes
2answers
4k views

How do I use gels to make my flash match the color of the ambient light?

When using fill flash to supplement ambient light, how do you determine the flash color that will match the ambient light?
8
votes
4answers
14k views

Does Gimp have a Match Color function similar to that in Adobe Photoshop?

In a recent question, Steve Ross points out that Adobe Photoshop has a useful feature for matching color between photographs. Of course, color adjustment can be accomplished in Gimp with careful use ...
1
vote
2answers
419 views

Color issue: studio images have a pink hue

I have a small home studio and use 2 x 250 flash heads, and a white vinyl background. I use a Canon 5D Mk II and generally shoot at 1/125 and f11-13. My problem is my images all have a pink hue to ...
5
votes
1answer
4k views

I have scanned a film negative - how do I adjust the color using software?

I have scanned some film negatives (35mm) and have run into the classic orange color problem. Using the Gimp, simply inverting the color of the image (Colors->Invert) leads to a very discolored image ...
14
votes
6answers
8k views

How could one make a DIY Gray card for exposure/color correction?

I know that there are "gray cards" sold that help with exposure/color correction, but as I'm on a tight budget I'd like to make my own. Is this possible? Also, are there other objects (paint sample ...
5
votes
4answers
457 views

What *exactly* is white balance?

When setting a white balance configuration, we adjust the temperature and green-magenta shift to a wavelength-intensity distribution of light that correlates most closely with the actual distribution ...
5
votes
2answers
5k views

How to change background and maintain realistic effect?

I have like 30 different photos to process like this, but I want to know key things to maintain realistic photo by changing it's background, or maybe just modify background so it would be more ...
16
votes
3answers
650 views

How to avoid visual “burnout” during post-processing?

Sometimes I keep on adjusting a photo for longer than is healthy. What follows is that I go somewhat blind to tones and colors. Then, I get oversaturated and dark images. I am new to RAW processing, ...
11
votes
1answer
383 views

Why are the red light and its hood in my image colored different than they were in reality?

I took this image in a train station with shutter speed 1/8 second and AV mode, the aperture was chosen to be 4.5. The problem in the colors of the spotlight in the right corner of the image. In the ...
8
votes
2answers
12k views

What are the RGB values that correctly represent a 5800 K white surface on a calibrated 6500 K monitor?

Consider a high-quality monitor calibrated at the standard parameters: 6500 K, 2.2 gamma, 120 cd/m^2. Calibration is accomplished with a LaCie hardware sensor + its software, and it's quite accurate. ...
3
votes
1answer
2k views

Which online color correction services give good results?

I have a photo with some problems, like washed out colors, overexposure and a bit of blurriness. I tried to fix it myself in photoshop but that didn't go very well. I also tried an online service I ...
7
votes
3answers
612 views

How do I adjust colour casts between photos taken at different times?

I have several photos of similar subjects on the same background. As they were taken outside at different times, the lighting conditions are different, and so the colours in the photos aren't ...
5
votes
2answers
619 views

How can I evaluate the colour accuracy of my photos?

I have noticed that the colours in my photos are quite dependant on the medium on which I am viewing them — the camera LCD, computer monitor, TV, digital photo frame and print. So, something that ...
2
votes
2answers
69 views

What should I do with negative values when computing sRGB colors from spectra?

This question is from the computational side of things. Maybe some of you computational photography folks can help me out. If I have a normalized CIE XYZ tristimulus vector like this one: (x, y, z) ...
2
votes
1answer
654 views

Colour correction/Colour balance in Post processing of Raw images

I have some RAW files (CR2 and NEF) captured using Canon & Nikon cameras. If I have to perform Colour balancing/Colour correction using Lightroom or Adobe Photoshop CS, would those tools give me ...
1
vote
4answers
561 views

Will LEDs work with a point & shoot camera for light booth digital photography?

I am planning on using multiple strips of LEDs to light up a 2 ft x 2 ft x 2 ft light booth for taking pictures of small items. LED output is Cool White 6500k. Digital camera is low cost 5 megapixel ...
0
votes
1answer
138 views

Why do SLRs and DSLRs use different flash gels?

I occasionally use gels to match my flash to ambient lighting. It’s easy to find green gels (CTG) to match fluorescent lights and orange gels (CTO) to match incandescent. However, in my experience, ...