Photoshop "Curves" dialog – what’s the mathematics behind?

MR
Posted By
Mike Russell
Dec 13, 2007
Views
289
Replies
2
Status
Closed
I’d like to draw a curve as shown in the below image:
http://www.sunlitgreen.com/screenshots/images/SGPE_screensho t_03.jpg
It’s cool and I like it so much.

Someone told me that’s exactly the same as in Photoshop and GIMP. But I failed to find usefull information in their online documentation.

Any idea how to draw such a "smooth curve"?
Viz. given a couple of control points, to darw a curve connecting all of them.

Do a google for bicubic spline – that’s the type of curve that is used. —
Mike Russell – www.curvemeister.com
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behind curve dialog

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A
Aved
Dec 14, 2007
Hi,

I’d like to draw a curve as shown in the below image:
http://www.sunlitgreen.com/screenshots/images/SGPE_screensho t_03.jpg

It’s cool and I like it so much.

Someone told me that’s exactly the same as in Photoshop and GIMP. But I failed to find usefull information in their online documentation.

Any idea how to draw such a "smooth curve"?
Viz. given a couple of control points, to darw a curve connecting all of them.

Thanks.
A
Aved
Dec 14, 2007
On Dec 14, 2:57 am, "Mike Russell" <
MOVE> wrote:
I’d like to draw a curve as shown in the below image:
http://www.sunlitgreen.com/screenshots/images/SGPE_screensho t_03.jpg

It’s cool and I like it so much.

Someone told me that’s exactly the same as in Photoshop and GIMP. But I failed to find usefull information in their online documentation.

Any idea how to draw such a "smooth curve"?
Viz. given a couple of control points, to darw a curve connecting all of them.

Do a google for bicubic spline – that’s the type of curve that is used. —
Mike Russell -www.curvemeister.com

Thanks for the information.

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