Digital technologies/Laser cutting/Vector graphics- Intermediate/Trace bitmap
To be able to raster an image obtained online, it must first be converted into a Bitmap, that is, turning the image into a map of pixels that the laser head can follow for an engraving. The simpler the image, the better the results will be. There are different main types of detection modes, namely:
1.Brightness Cut-off:
The higher the threshold is, the fewer the number of pixels that will be considered to be “white”, and the image gets darker.
2.Edge Detection:
Produces a bitmap that will look less like the original image compared to Brightness Threshold but will provide curve information.
3.Color Quantization:
Find edges where colors change, even at equal brightness and contrast.
The following video explains how to use the Trace Bitmap feature in Inkscape and the different detection modes that can be employed.
The Trace Bitmap feature can be obtained either by right-clicking on the image and selecting Trace Bitmap, as shown in the video or by going to Path->Trace Bitmap:
