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iTool User's Guide: Working with Images |
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There are six types of filters available in the iImage tool.
To convolve an image:
For more details on the convolution filter, see Convolution Filter.
The median filter replaces each pixel with the median (a value in an ordered set of values with an equal number of values above and below it) of the two-dimensional neighborhood of a given width.
To apply the median filter to an image:
For more details on the median filter, see Median Filter.
The smooth filter removes unwanted noise from an image using a weighted average.
To apply the smooth filter to an image:
For more details on the smooth filter, seeSmooth Filter.
The Roberts filter uses the Roberts edge enhancement operator to detect edges within the image.
To apply the Roberts filter to an image:
The Sobel filter uses the Sobel edge enhancement operator to detect edges within the image.
To apply the Sobel filter to an image:
The unsharp mask enhances the contrast between neighboring pixels in an image.
To apply the Unsharp Mask filter:
For more details on the unsharp mask filter, see Unsharp Mask Filter.
IDL Online Help (March 01, 2006)