Reference Manual

Print2CAD 2019, Artificial Intelligence

Vectorization 3:

Threshold for the Color Black and Image extraction

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Vectorization 3: Threshold for the Color Black and Image extraction
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Threshold for Black & White Vectorization

Correct Threshold Parameter

Correct Threshold Parameter

Incorrect Threshold Parameter

Incorrect Threshold Parameter

Thresholding of a pixel area
Thresholding of a pixel area
Thresholding of a pixel area

The threshold is a very important factor with which scanned drawings can be cleaned up. It is also a crucial factor for the success or failure of a vectorization.

The vectorization is always carried out based on a Black / White raster image. Based on the threshold value, the program decides what is black and what is white.

Sample: Thresholding of a pixel area (in square the pixel gray color) with a Threshold = 100

For black/white vectorizations, the threshold value for the color black associates the color black to all pixels that are darker than the threshold. The remaining pixels are white.
- If the threshold is too low, important parts of the drawing may disappear.
- If the threshold is too high, parts of the drawing may melt together and will not be identifiable.

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Threshold for Color Vectorization

The threshold for colored vectorizations must be split into a separate value for black and a separate value for white. Between the two values, the colors are unchanged.

Threshold for Color Vectorization
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Extract raster images

Using this function, raster images can be extracted to your hard drive. Print2CAD summarizes all raster images from the PDF to a common image at a 300 dpi resolution.

Parameter: Extract raster images and save them on your hard drive

The raster images are extracted and incorporated into the converted DWG as elements -Image.

Parameter: Save raster files in the source or destination directory

The raster images are stored in the target directory.

Parameter: Save raster files in the following path

The raster images are stored in the chosen directory.

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