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Inverse image transform

asked 2018-03-19 19:50:10 +0200

MathMan42 gravatar image

Does Sage have an inverse image transform?

By that, I mean is there a function where, given an image $X$, and function $f$, it generates an image $Y$, such that pixel $p$ of $Y$ is assigned the color of $f(p) \in X$?

Note that for convenience, you can also say what rectangle the input and output image represent. (I.e. you could say that pixels in $Y$ correspond to points in $[-1,1] \times [-1,1]$.

For reference, here is mathematica's version is called ImageTransformation.

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answered 2018-03-21 14:16:31 +0200

slelievre gravatar image

The Python Image Library is shipped by Sage in the form of the PIL package.

Then your question becomes how to do image transformation with PIL.

A quick web search:


where there is a link to:

Using certain functions in PIL might require the presence of a jpeg library in your system, otherwise you might get error messages such as "decoder jpeg not available". See

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Asked: 2018-03-19 19:50:10 +0200

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Last updated: Mar 21 '18