DullRasor uses image processing techniques to analyze and segmentates skin areas with dark hair. This program removes dark hairs form images, and makes skin lesion images clean to further processing.

Skin image with lesion and hairs    Skin image conversion    Skin image with lesion and without hairs

 

Many skin images contain various numbers of hairs. Other skin segmentation programs may mislead because of hairs – especially dark ones. One solution can be shaving skin before taking pictures of it. But shaving of skin adds more time to processing and this is uncomfortable and in some cases unesthetical.  Hence, a software approach for dark thick hair removal from skin images is needed.

There is only one program window:

 

DullRazor 

 

DullRazor performs the following steps:

  1. It identifies the dark hair locations by a generalized grayscale morphological closing operation,
  2. It verifies the shape of the hair pixels as thin and long structure, and replace the verified pixels by a bilinear interpolation;
  3. It smoothes the replaced hair pixels with an adaptive median filter.

The algorithm has been implemented in C on a SunOS 4.x workstation. (The program can be run on Sun Solaris workstations as well.) It has been tested on real nevi images with satisfactory results.

 

Download the Unix version of DullRazor (dullrazor.zip, 87KB).
Download the Windows version of DullRazor (dullrazor_wins.zip, 327KB.

My personal test on one of images:

 Skin lesion with hairs

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 Skin lesion without hair

Read more in: http://www.derm.ubc.ca/dull_razor/