Mitsubishi Electronics DV1248ST user manual Threshold button

Threshold button

Threshold function is very useful when you scan line art images or scan documents for OCR (optical character recognition) use. You may use this function to adjust the quality of line art images or eliminate unwanted dots in the document to improve the accuracy of recognition.

Note: this function is only applicable when you select Line Art as the Image Type.

Select the Threshold button, and the Threshold dialog box will appear:

The x-axis in the histogram represents the brightness level of the pixels in the image (from 0 to 255, from left to right). The y-axis represents the quantity of pixels.

To adjust the threshold value, drag the triangle below the histogram or enter the threshold value in the Threshold entry box directly. For example:

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