Bio-Rad Quantity One 1-D Analysis Software - Manual (Page 89)

Quantity One User Guide
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the pixel being processed with the mean of the maximum and minimum pixel
values within the filtering window.
• PowerMean. This filter is useful for suppressing salt and Gaussian noise within
an image (it worsens the effect of pepper noise). It replaces the value of the pixel
being processed with the power mean of the pixel values within the filtering
window.
• ContraMean. This filter is useful for suppressing pepper and Gaussian noise
within an image (it worsens the effect of salt). It replaces the value of the pixel
being processed with the contra-harmonic mean of the pixel values within the
filtering window.
• Adaptive. This filter is useful for suppressing Gaussian noise and salt and/or
pepper within an image. If the image contains a mix of salt and pepper, select this
filter.
To begin filtering, select a filter type from the pull-down list. A pop-up box will
prompt you to select a filter size.
Fig. 3-23. Selecting a filter size.
Click on a button to select a size. (See, Step 2: Select Filter Size for guidance.)
Because filtering is an irreversible process, you will be prompted to filter the original
image, filter a copy of the image, or cancel the operation.
If you choose Copy and Filter, enter a name and/or version number for the new copy
in the pop-up box and click on OK.