Graphing Large Images

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Extract Unique Color Values


Nowadays, it's not uncommon to have image files that make up 3 or 4 (or 10 or 20!) Megabytes in size. ColorThink Pro was designed as an analytical tool, rather than a production tool. For that reason the Grapher can graph the location of every pixel in an image. There is no specified size limit in the manual since how fast the Grapher will display the image pixels will depend on how fast a system you have. On a slow computer, a large image file can take several minutes before it shows up in the Grapher. Here's a section in the manual that talks about image size in the Grapher: http://www.colorwiki.com/wiki/ColorThink_Pro_-_Grapher#Working_with_Images_and_Lists

Graph list will open this color list into the Grapher.

Below is the method CHROMiX recommends to be most efficient about reducing an image file size, while still preserving all the perceptible colors of the original image.

  1. Bring the image into the worksheet first, (or open in ColorThink Pro, and the image will automatically open in the Worksheet.)
  2. In the image title drop-down box, choose Extract Unique Color Values,
  3. In the drop-down box for the resulting color list, choose Graph List.
Use Save Image As to save the color list as an image.

This not only gives you a count of how many unique colors are in your image, but you can make this list a "Primary Data Source" and even save it out as its own discrete image. This new image can be brought into the Grapher anytime in the future, without having to go through the steps above.


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