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Legacy Documentation

Digital Image Processing (2000)

This is documentation for an obsolete product.

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ImageRotate

ImageRotate[img,

] returns img rotated counterclockwise by angle

radians around its center.

ImageRotate[img,

, {r₀, c₀}] returns img rotated counterclockwise by angle

radians around pivot point r₀, c₀.

The default pivot point is (Dimensions[img]+1)/2.

The option InterpolationOrder determines the interpolation strategy used in calculating the pixel values in the rotated image. Nearest-neighbor (InterpolationOrder → 0) or higher-order interpolants may be used.

The default setting is InterpolationOrder → 1, which selects bilinear interpolation.

The option FullImageView determines if the returned result is of the same dimensions (default) as the original or extends it to include all the rotated pixels (FullImageView → True).

The argument img may be a matrix or ImageData expression.

See also User's Guide 4.3.

Modified in Version 2.

Examples

This loads the package.

In[1]:=

This loads the example beans image.

In[2]:=

Here we compare rotation with nearest-neighbor and bilinear interpolation strategies. By default, the returned image is of the same dimensions as the original.

In[3]:=

Out[3]=

Out[3]=

The following two results show a full view of a rotation (left) and the default view of a rotation about an alternate pivot point (right).

In[4]:=

Out[4]=

Out[4]=