Microscan Quadrus Verifier, Руководство пользователя

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Quadrus Verifier User’s Manual
11-9
Camera Setup
Line Scan
1. From the Evaluation tab, click the Line Scan button.
The window shown in the figure below appears.
Hint : When the Histogram window opens, you might need to expand the window and/
or adjust the scroll bars in order to bring the image into view.
2. Drag your mouse pointer across the image, horizontally.
It will create a dashed horizontal line. Pixel information and a visual representation of
the dark and light pixels will be displayed below the image.
When you center your cursor over the dashed line, it becomes a double arrow cross.
This will allow you to move this line anywhere in the window. You can also use your
keyboard arrows to move this line incrementally in any direction.
As with the histogram, the line scan compares light and dark pixels, but in a spacial distribution.
On the Y axis of the graph,
0 is black and 255 is white; the X axis represents the horizontal axis
of the symbol as described by the line scan.
When you click anywhere on the graph, a vertical red line appears at that point and its
position and value (in terms of black to white) are updated in the
Pixel Info table to the
left of the graph, in this case 237 . In addition, a horizontal, dashed red line is displayed
that indicates the average value.
Line Scan