Print2CAD 2019, Artificial Intelligence
Threshold for Black & White Vectorization
Correct Threshold Parameter
Incorrect Threshold Parameter
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.
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.
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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