Random Dithering
   
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    GraphicsAcademy.com  >  Glossary  >  Random Dithering

       

     

    Random Dithering

    Random Dithering is a method of dithering which can be used for converting color or gray scale images into monochrome (black and white) images.

    Random Dithering works by choosing a different random value for each pixel in the image. If the pixel is more intense (usually a higher number) than the random value, it becomes white, if not, it becomes black.

    Random Dithering tends to produce images with a lot of high frequency noise artifacts (like a badly tuned TV picture), and so is usually not appropriate unless you actually wish to achieve this type of special effect. However, there are a few cases (generally very simple images with little detail - such as a picture containing a smooth gradient of grays from black to white), where random dithering may actual produce better results than other methods of dithering.

    The picture below shows a gray scale image, and the results of converting it to monochrome using Random Dithering:

    Original Image:
    Original image
    Random Dithered:
    Image converted to monochrome using Random Dithering

    To give you an idea of what the detail of image looks like after Random Dithering, here is the monochrome image greatly enlarged so that you can see the individual pixels:

    Enlarged version of image converted to monochrome using Random Dithering


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    • Random Dithering

      A techical explanation of how ordered dithering works (with pictures).




       
     
       
     
       
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