Red blue and green channels

[grant wilson]

i have looked for this answer everywhere, but have drawn a blank. i would like to know what the various channels - red, blue and green - represent. i ask this in the context of the histograms available. not understanding what each colour represents means i don't fully understand the histograms themselves.

many thanks in advance for your help.

 

[Cail Young]

Distribution of luminance values within a certain hue band. Make sense?

 

[Julio Quintana]

The histogram tells you the amount of red, blue, and green light hitting the sensor. I'm not sure how detailed of an answer you're looking for.

 

[kay madsen]

check this very informative presentation compiled by Stephen Young, it will teach you everything you need to know about histograms.

http://madsenfilm.de/downloads/histograms.zip

 

[grant wilson]

check this very informative presentation compiled by Stephen Young, it will teach you everything you need to know about histograms.

http://madsenfilm.de/downloads/histograms.zip

thanks kay... exactly what i was looking for.

 

[hanselblat]

histograms as lightmeter

histograms as lightmeter

I hope I'm not highjacking this thread but instead am contributing to it. Currently I'm using the RGB parade--three histograms of red, green and blue-- in raw view on the lcd as a lightmeter. I have the impression that it's the one of the most accurate ways to measure light. Does anyone else have experience with this, and if so, what are your thoughts?
Hans

 

[Henk van den Doel]

At the moment I find the RGB parade a very helpful and especially quick tool to see whether we are shooting safely or not. I once accidentally switched it on and never turned it off. The great thing is that it is always on the screen, even when using the Edge Highlight to be sure about focus as well. However I can't read the histogram and picture well enough together to be sure about what values I get in which part of the picture. So I also switch to False Color every now and then to check for skin tones for example. Especially on close-ups, I want to have it right on the faces and I think False Color is probably most helpful in this respect. For those who haven't used False Color yet, check the RED manual on this. There is good explanation on how to read it.