The thresholder separates the foreground from the background. The output image is composed of black and white pixels with no shades in between the foreground is white and the background is black. Some of the pixels can be miscategorized, but these errors can be easily corrected using various post-processing algorithms.

Grayscale thresholder

This thresholder is a modified version of the ImageJ grayscale thresholder. Before the thresholding process, the Processing Window should be set to the filtered mode. Appropriate threshold values should be set. The process is completed by clicking . More information about the grayscale thresholder can be found on the ImageJ website.

thresholding view

thresholding view

Color thresholder

This thresholder is also based on a built-in ImageJ module, the color thresholder. Before the thresholding process, the Processing Window should be set to the filtered mode. Appropriate threshold values should be set. The process is completed by clicking . More information about the color thresholder can be found on the ImageJ website.

thresholding view