What does the colorize button actually do?

DF
Posted By
Derek Fountain
Aug 20, 2005
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What does the colorize checkbox in the Hue/Saturation dialog box actually do? The documentation says to check it if you want to colorize your image, but I can’t find a description of what colorization actually is.

It appears to be similar to the Color blend mode – it keeps the lightness of the pixels the same while converting them to a hue of your choice. If that’s the case, what is the difference between dragging the hue slider with colorize checked, and dragging the hue slider with colorize unchecked? AFAICS you just seem to get more garish colours when the box isn’t checked. :o)
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N
nomail
Aug 20, 2005
Derek Fountain wrote:

What does the colorize checkbox in the Hue/Saturation dialog box actually do? The documentation says to check it if you want to colorize your image, but I can’t find a description of what colorization actually is.
It appears to be similar to the Color blend mode – it keeps the lightness of the pixels the same while converting them to a hue of your choice.

That is correct.

If that’s the case, what is the difference between dragging the hue slider with colorize checked, and dragging the hue slider with colorize unchecked? AFAICS you just seem to get more garish colours when the box isn’t checked. :o)

If you drag the hue slider without the colorize checkbox checked, the hue of all the colors will shift with the same amount, so the colors remain different.

—
Johan W. Elzenga johan<<at>>johanfoto.nl Editor / Photographer http://www.johanfoto.nl/
A
archy
Aug 20, 2005
"Derek Fountain" wrote in message
What does the colorize checkbox in the Hue/Saturation dialog box actually do? The documentation says to check it if you want to colorize your image, but I can’t find a description of what colorization actually is.
It appears to be similar to the Color blend mode – it keeps the lightness of the pixels the same while converting them to a hue of your choice. If that’s the case, what is the difference between dragging the hue slider with colorize checked, and dragging the hue slider with colorize unchecked? AFAICS you just seem to get more garish colours when the box isn’t checked. :o)

If you check colorize, it has a similar effect to making a duotone image of white plus the colour you map to. If you leave it unchecked, it remaps the spectrum.

—
archy
"we only live, only suspire,
consumed by either fire or fire" (T.S. Eliot)
T
Tacit
Aug 21, 2005
In article <43078d33$0$16783$>,
Derek Fountain wrote:

It appears to be similar to the Color blend mode – it keeps the lightness of the pixels the same while converting them to a hue of your choice. If that’s the case, what is the difference between dragging the hue slider with colorize checked, and dragging the hue slider with colorize unchecked? AFAICS you just seem to get more garish colours when the box isn’t checked. :o)

If you check the Colorize button, Hue and Saturation makes every pixel the same hue.

If you do not, then when you drag the Hue slider, you change the EXISTING hue of each pixel–green pixels become blue, for example, or purple pixels become yellow–but not all the pixels become the same hue.

—
Art, photography, shareware, polyamory, literature, kink: all at http://www.xeromag.com/franklin.html
DM
Dan M
Aug 21, 2005
"Derek Fountain" wrote in message
What does the colorize checkbox in the Hue/Saturation dialog box actually do? The documentation says to check it if you want to colorize your image, but I can’t find a description of what colorization actually is.
It appears to be similar to the Color blend mode – it keeps the lightness of the pixels the same while converting them to a hue of your choice. If that’s the case, what is the difference between dragging the hue slider with colorize checked, and dragging the hue slider with colorize unchecked? AFAICS you just seem to get more garish colours when the box isn’t checked. :o)
true….but it better with it check so you can see the actual color. It just lets you adjust the manually see it….

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