laser-cutter-thresholder

Thresholds images for clear laser cuts. Written for Apiary Club by Matthew Fala (co-founder)

Thresholder converts images to pure black and white photos

Apiary Club laser-cutter-thresholder

by Matthew Fala

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Laser Cutter Thresholder consists of one section:

1. Thresholding software for engraving plant photos into signs

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Build Requirements:

Install Processing 3+

Download and install from https://processing.org/download/

Setup:

Place input image in a subfolder of LaserCutterThresholder

1. Open LaserCutterThresholder.pde
2. Modify dir = "" to point to the subfolder containing the target image
3. Modify fileName = "" to the target image file

If local threshold is desired:

1. Adjust noiseReduction. Noise reduction will lower the local threshold makeing the output image contain less black pixels
2. Adjust brushSize. Brush size will set a neighborhood radius for each pixel used in thresholding. Runtime is O(n^2) where n is radius

If global threshold is desired:

1. Adjust blacken. Blacken raises an autodetermined threshold to make the resulting image contain more black pixels

Usage:

After setting up the software

1. Press the Processing build button
2. Choose 1 of the 4 thresholding types

   Options: Grayscale, Global, Local, Edge

3. Wait. this may take some time
4. The thresholded laserfriendly image will be exported to the LaserCutterThreshold/output folder
5. To revert to the original color image and run annother threshold, click the thresholded image

Local Thresholding:

Shadow Removal Example: