Mitsubishi P91DW User Manual Page 132

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Chapter 5: Analysis Tools
5-31
The Smooth Data function (found in the Data menu) minimizes single pixel
background noise in a lane.
original graph smoothed graph
When this function is selected, the menu option changes to “Unsmooth Data.”
Selecting this undoes the smoothing operation.
The Invert Button
The INVERT function reverses the gray scale assignments, so that zero corresponds to
white and 4,096 corresponds to black. This function can be selected by placing an “X” in
the INVERT checkbox, or by selecting Invert Data from a graph’s Data pull down
menu.
If the image has dark bands and light background, then INVERT should be selected.
If the image has light bands and dark background, the INVERT option should not be
activated.
On the graph, the regions that were peaks are now closer to the baseline and those that
were near the baseline are now peaks.
original graph inverted graph
Since the baseline is determined when the image is initially scanned, it may be necessary
to use the Reset Baseline function to set an accurate baseline for newly-inverted data.
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