ISIS Application Documentation
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Sharpen the features in a cube
Description
Categories
Groups
Examples
History
Description
Categories
Related Applications to Previous Versions of ISIS
This program replaces the following application existing in previous versions of ISIS:- boxfilter
Related Objects and Documents
Applications
Parameter Groups
Files
| Name | Description |
|---|---|
| FROM | Input file |
| TO | Output highpass cube |
Boxcar Size
| Name | Description |
|---|---|
| SAMPLES | Number of samples in boxcar |
| LINES | Number of lines in boxcar |
Boxcar Restrictions
| Name | Description |
|---|---|
| LOW | Valid minimum pixel |
| HIGH | Valid maximum pixel |
| MINIMUM | Minimum boxcar pixel count |
Other
| Name | Description |
|---|---|
| PROPAGATE | Propagate special pixels |
Files: FROM
Description
Input cube to filter
| Type | cube |
|---|---|
| File Mode | input |
| Filter | *.cub |
Files: TO
Description
The resultant filtered cube
| Type | cube |
|---|---|
| File Mode | output |
Boxcar Size: SAMPLES
Description
This is the total number of samples in the boxcar. It must be odd and can not exceed twice the number of samples in the cube. In general, the size of the boxcar does not cause the program to operate significantly slower.
| Type | integer |
|---|---|
| Default | 3 |
| Minimum | 1 (inclusive) |
| Odd | This value must be an odd number |
Boxcar Size: LINES
Description
This is the total number of lines in the boxcar. It must be odd and can not exceed twice the number of lines in the cube. In general, the size of the boxcar does not cause the program to operate significantly slower.
| Type | integer |
|---|---|
| Default | 3 |
| Minimum | 1 (inclusive) |
| Odd | This value must be an odd number |
Boxcar Restrictions: LOW
Description
Valid minimum pixel value that will be used in boxcar computation. If a pixel value is less than LOW then it will not be used when computing boxcar statistics.
| Type | double |
|---|---|
| Internal Default | Use all pixels |
| Less Than |
|
Boxcar Restrictions: HIGH
Description
Valid maximum pixel value that will be used in boxcar computation. If a pixel value is greater than HIGH then it will not be used when computing boxcar statistics.
| Type | double |
|---|---|
| Internal Default | Use all pixels |
| Greater Than |
|
Boxcar Restrictions: MINIMUM
Description
This is the minimum number of valid pixels which must occur inside the NxM boxcar for filtering to occur. For example, 3x5 boxcar has 15 pixels inside. If MINIMUM=10 then the filter will occur if there are 10 or greater valid pixels. A valid pixel is one that is not special (NULL, LIS, etc) and is in the range defined by LOW to HIGH.
| Type | integer |
|---|---|
| Default | 1 |
| Minimum | 1 (inclusive) |
Other: PROPAGATE
Description
This option is used to define how special pixels are handled. If the center pixel of the boxcar is a special pixel it will be propagated or set to NULL depending on the value of this parameter.
| Type | boolean |
|---|---|
| Default | TRUE |
Examples
Example 1
3x3
Description
Command Line
GUI Screenshot
Sharpen Gui
|
Example Gui Screenshot of GUI with parameters filled in to perform a "sharpen"ing of the input image with the default boxcar of 3x3. |
Input Image
Input image
|
Input image for sharpen
Parameter Name:
FROM This is the input image for the sharpen example. |
Output Image
Output image showing results of the sharpen application.
|
Output image for sharpen
Parameter Name:
TO This is the output image for this example of sharpen. Notice the edges of features are sharper. It is the same as running highpass and adding the highpass output back to the input image. |
History
| Eric Eliason | 1988-05-20 | Original version |
| Jeff Anderson | 2002-09-25 | Ported to Isis 3.0 |
| K Teal Thompson | 2003-04-10 | Add example. |
| Kim Sides | 2003-05-13 | Added application test |
| Stuart Sides | 2003-05-16 | Modified schema location from astogeology... to isis.astrogeology..." |
| Stuart Sides | 2003-07-29 | Modified filename parameters to be cube parameters where necessary |
| Jeff Anderson | 2004-02-17 | Removed addback option and put it in the highpass program |