User`s guide

R2009b
12-4
Parameter Description
'ThetaResolution' Real scalar value between 0 and 90, exclusive,
that specifies the spacing (in degrees) of the
Hough transform bins along the theta axis.
Default: 1.
For 'ThetaResolution', ntheta = 2*ceil(90/ThetaResolution). theta angle
values are in the range [-90, 90) degrees. If 90/ThetaResolution is not an integer, the
actual angle spacing is 90/ceil(90/ThetaResolution).
The imfilter Function Now Faster for uint16 and double Inputs
The imfilter function now runs faster with uint16 and double inputs than in previous
releases. This performance enhancement is due to the use of the Intel IPP Library with
inputs of these types.
Compatibility Considerations
Using the Intel IPP library for uint16 images, poses no compatibility issues. The same
is not true, however, for the double data type.
If an input image contains NaN values and a filtering kernel contains zero values, the
imfilter function now gives different results when the Intel IPP library is enabled
versus when it is disabled. If you want to preserve the behavior of previous releases, use
iptsetpref('UseIPPL',false) to disable the Intel IPP library.
Improved Speed for Calculating N-D Euclidean Distance Transforms with
the bwdist Function
A new algorithm improves the speed and reduces the memory footprint for the bwdist
function.
Compatibility Considerations
In previous releases, the bwdist function used different algorithms for computing the
Euclidean distance transform and the associated label matrix. If you need the same
results produced by the previous implementation, use the function bwdist_old.