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)

Derek Fountain <nomail@hursley.ibm.com> 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 i
s.
>
> 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/

"Derek Fountain" <nomail@hursley.ibm.com> wrote in message
news:43078d33$0$16783$892e7fe2@authen.white.readfreenews.net...
> 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)

In article <43078d33$0$16783$892e7fe2@authen.white.readfreenews.net>,
Derek Fountain <nomail@hursley.ibm.com> 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

"Derek Fountain" <nomail@hursley.ibm.com> wrote in message
news:43078d33$0$16783$892e7fe2@authen.white.readfreenews.net...
> 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....