Is RGB and True colortype image is same?

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Shaila parvin
Shaila parvin 2014-1-20
回答： Image Analyst 2014-1-20
I want to download some RGB images. But after downloading images I've found that all are truecolor images. Are they same?
Please help me.

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Bruno Pop-Stefanov
Bruno Pop-Stefanov 2014-1-20
Yes, this is the same. "True color" refers to the depth of an RGB image. With true colors, each pixel of an RGB image is 24-bit: each of the three components (red, green, blue) has a value between 0 and 255 (8 bits).

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Image Analyst
Image Analyst 2014-1-20
"True" color means color in the visible wavelength range, which means red, green, and blue, so "True" color is the same as RGB. You could also have other kinds of color like pseudocolor where it's an integer image where each value gets mapped into a color via a pseudocolor look up table, or a hyperspectral image (like from satellites) where they represent different wavelengths, some that are invisible. Any of those spectral channels can be mapped into red, green, or blue, so even though they are RGB images, they are not really "true color" if they didn't construct the RGB image from visible wavelength spectral channels. They would be pseudocolor images.

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