Image Thresholding

I was playing with image thresholding and got some interesting results which I thought to share.

1. The original image:

2. Converted to black and white and image mode changes to greyscale. It now has just 256 levels of grey.
DSC_0079 copy

3. I then applied thresholding on the above image. It essentially converts the image to binary. There are pure black pixels and pure white pixels. Nothing in between (no grey).
DSC_0079 copy 2

Thresholding allows you to declare anything darker than a level as black and anything brighter than a level as white.

4. Another example:

I kind of like the out come. What do you think. Give it a try.

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Posted in Photography
9 comments on “Image Thresholding
  1. Looks like grainy film, and almost like a negative. Very interesting!

    • Dr_IQ says:

      Thanks. One can get the inverted image also. This thing needs practice. We use it to extract features from metallurgical micrographs. But applying it on other images and specially humans is a different story.

  2. The black and white versions look like M.C. Escher’s famous art! 🙂

    • Dr_IQ says:

      Thanks Thomas. I checked Escher’s tessellations. Beautiful art. I see one similarity with the typical Muslim Art which exploits repeated patterns.

  3. neihtn2012 says:

    Interesting. I will give it a try.

  4. smilyking1976 says:

    Reblogged this on Real Money Making Biz.

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