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ImageData

Status: Stable

documented, exercised by the test suite and/or worked examples, with no known limitations recorded.

Description

ImageData[image] gives the pixel array as reals in [0, 1], scaling out the image's type -- a "Byte" 255 comes back as exactly 1.0. The array is height x width, or height x width x channels for a colour image, interleaved. ImageData[image, type] gives the stored values unscaled instead, where type must be the image's own type; converting between types is a separate operation with its own rounding, not something this does silently.

Examples (2)

Every input below was run against the current Mathilda build and its output recorded.

Basic examples (2)

In[1]:= ImageData[Image[{{0, 128, 255}}]]
Out[1]= {{0.0, 0.501961, 1.0}}

In[2]:= ImageData[Image[{{0, 128, 255}}], "Byte"]
Out[2]= {{0, 128, 255}}

Implementation notes

Attributes: Protected.

References

See also: FullForm