Magnification Calibration

For image capture devices which have square pixels such as the CapiScope® HVCS, then only one dimension needs to be calibrated.

Line up Graticule with CapiScope® video output and focus as usual. Move the Graticule so as much of the 1/10 mm scale (x-axis) and the 1/100-inch scale (y-axis) is displayed on the output window. Freeze the video output with the icon; click on the button (Measurement) and then on the button (Dimension line).

Click on the start of the furthest left black line on the mm (x-axis) scale and then on the start of the furthest right black line on the mm scale. This will be dimension line number 1.

For non-square pixel image capture devices or files, click on the bottom of the topmost black line on the inch (y-axis) scale and then on the bottom of the lowest black line on the inch scale. This will be dimension line number 2.

Alternatively, a single diagonal line can be drawn. The separate x and y components will be used for the calibration.

Click Calibrate Magnification to bring up the Calibration dialog box.

For square pixel images, enter the true length for just the x axis. Leave the y axis blank or enter zero for the y axis line.

For non-square images then enter the true length for both X and Y lines. Note that in the example above, the X scale has divisions of 0.1mm and the Y scale has divisions of 0.1”, which is 254 um.

If using a single diagonal line, enter the same line number for both x and y. Enter the true x and true y distances.

Tick Set as default magnification and press OK.

The current magnification setting is shown in the status box.