The Sleeping Giant's Sea Lion

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Color is the human perception of light as having different hue, from reds and oranges, through yellows and greens, to blues and violets. Color is a fundamental aspect of the arts and photography.

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8
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2answers
887 views

Why are sensors less sensitive to blue light?

This is a followup question to Why is the blue channel the noisiest?. The simple answer to that question is that sensors are less sensitive to blue, and therefore require more amplification, which ...
27
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3answers
3k views

Why is the blue channel the noisiest?

It is widely observed that the blue channel in digital cameras is the noisiest. I've certainly noticed that with my camera. Why is this? Is it an artifact of some particular technology (e.g. Bayer ...
24
votes
3answers
2k views

What is the meaning of “white balance”?

I would like to understand the term white balance. My camera has settings for white balance with the following options: Auto white balance Daylight Cloudy Shade Flash Incandescent lights White set1 ...
3
votes
1answer
406 views

What is the photopic luminous efficiency function?

What is the photopic luminous efficiency function? Is it actually a the, or are there multiple such functions? Is it an absolute fact of nature or simply an agreed-on standard? If the later, who ...
11
votes
5answers
2k views

Recommended clothing colours for portraits?

What colour of clothing do you recommend your clients wear during a portrait photo session? I recently completed an urban photo shoot where the colour of my client's dress gave an odd cast to some of ...
3
votes
2answers
624 views

Why is my Pentax K-x producing artifacts and color banding?

my Pentax K-x is acting up :( In low light scenarios I got heavy color banding and 'strange' image artifacts. You can find an example here: http://imgur.com/v0lzP I took it at ISO 400 and the color ...
4
votes
1answer
295 views

What is the green tinge in my photo? [duplicate]

Possible Duplicate: Problem with fluorescent lighting and shutter speed? I am shooting with a 5D MkII and a 50mm f/1.8 II. In the picture below you can see a really obvious green tinge on ...
3
votes
1answer
1k views

How do I extract a specific hue into a channel in Photoshop?

I have a gold handprint that I want to set up as a spot for printing. Since it was done with one substance, it should be possible to convert the image to only the gold spot and black. I've searched ...
14
votes
3answers
2k views

Are RGB numeric values equal to CMYK percentages?

are RGB numeric values equal to CMYK percentages?
4
votes
2answers
63 views

Are there any good tools to figure out the correct gamma corrections for equal appearence?

Every display device has a different characteristic in regards of how the colours are shown. This can be adjusted by the gamma correction. Are there any good tools that help with finding the right ...