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ccdsharp - enhance/sharpen an image
ccdsharp [parameter=value]
Various methods to sharpen/image enhance an image can be tried
out here. The program is not very consistent in coordinate systems, some
(such as laplace) preserve it, others (aregan/pregan) shift the image
by half a pixel. Most images will have some edge effects too. For divergence/vorticity
the images are assumes to be vx and vy, in that order.
All sharpening operations
are applied to each plane independantly. If you need to sharpen in 3D,
use ccdsharp3(1NEMO)
.
The following parameters are recognized
in any order if the keyword is also given:
- in=
- Input image file. For certain
modes (see mode= below) the input file must contain at least two images.
No default.
- out=
- Output image file. No default.
- mode=
- Modes (laplace, aregan,
pregan, divergence, vorticity, grad). Minimum match applies. [Default: laplace].
To compute the vorticity of two images, vx and vy, containing the
X and Y velocities you would:
cat vx vy | ccdsharp - v.vor vor
ccdsharp3(1NEMO)
, ccdmath(1NEMO)
Peter Teuben,
20-Sep-95 V0.1 Created PJT
5-apr-96 V0.2 added divergence, vorticity PJT
12-jan-2012
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