Remove Noise from binary image.
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I have to work on this image
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/161443/image.jpeg)
When I convert this image into a binary image, I got noisy image like this:
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/161444/image.jpeg)
Which pre-processing techniques should I need to apply on this? I need braille dots as white dots and remaining background black in binary image. Please help, I am a newbie.
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Jan
2017년 3월 7일
An interesting problem. On the upper left of the image, I can recognize the dark shadows under the points only, and on the bottom I see the light on the upside of the point and shadow on the bottomside. Therefore I assume different techniques have to be combined. I had equivalent problems with a irregularily illuminated picture containing standard text and very curious about the answers.
Anika Paulsen
2017년 3월 13일
Try adaptive binarizing as documented here: https://www.mathworks.com/help/images/ref/imbinarize.html
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