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Legacy Documentation
Digital Image Processing
(2000)
This is documentation for an obsolete product.
Current products and services
Function Index
ImageWarp
ImageWarp[
img
,
w
]
performs a general spatial (polynomial) transformation on
img
defined by matrix
w
.
The transformation matrix
w
has dimensions 2×(N+1)(N+2)/2, where
N
is the order of a polynomial mapping function (see
WarpMatrix
).
The option
InterpolationOrder
determines the interpolation strategy used in calculating the pixel values in the warped image. Nearest-neighbor or higher-order interpolants may be used.
The default setting is
InterpolationOrder
→
1
, which selects bilinear interpolation.
Using
InterpolationOrder
→
0
results in nearest-neighbor interpolation.
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 is a transformation matrix that defines a clockwise rotation of 45 degrees around a pivot point at position {0, 0} in the image plane.
In[3]:=
This applies the spatial transformation defined by matrix
rot
to image
img
.
In[4]:=
Out[4]=
Here is an example of a rubber sheet transformation.
In[5]:=
Out[5]=
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