Adaptive Thresholding

Adaptive thresholding is an image segmentation algorithm that appears quite resistent to varying lighting conditions.

Global Value Adaptive Thresholding

(useful for barrel-in-sunlight detection)

• General Description

Otsu Thresholding

• Sample Image Filter
  • Original Source Code
  • Cleaned up Source Code by David

I've been trying to analyze the source code of this image filter (not written by me) in order to figure out how the Otsu Thresholding algorithm works. I've had limited success, in that I have completely figured out how GrayLevelClass.java works. However I have not been able to decode OtsuThresholding.java which appears to contain the essential details specific to the Otsu algorithm. --David 21:14, 7 Nov 2005 (EST)

Maximum Entropy Thresholding

• Sample Image Filter
  • Original Source Code
  • Cleaned up Source Code by David

Once again, I've tried to analyze the source code of this image filter in order to figure how the algorithm its using works. --David 21:27, 7 Nov 2005 (EST)

Local Value Adaptive Thresholding

(useful for line-on-grass detection)

• General Description
• Demo