CODEWITHSUNDEEP
algorithmvisualization
Hawkins
Hawkins

Reputation: 407

Image generation library

I need to generate such style image as this:

img

from matrix of numbers. Does anybody know any libs (preferable android/java) to doing it ?

Upvotes: 1

Views: 172

Answers (1)

Malcolm McLean
Malcolm McLean

Reputation: 6404

Generating the image is pretty trivial - you map the data to integers in a given range, then use as index in a look-up table. If you have only a limited range, say 0-255, you can save as GIF, if the range is larger, as a 24 bit truecolour image.

The hard part is generating the palettes. I have some on my website (they're written in C but it's trivial to change them over to any other sane language). Thye show geographical height with snow-topped mountains for the high values, lush green for the valleys, and deep blue water for the depths. Another is a heat map going from cold blue to red hot.

Go to this link and take the files colourschemes.c and .h

http://www.malcolmmclean.site11.com/www/datadensity/DataDensity.html

Upvotes: 1

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