Specifications

Intel
®
Image Processing Library Reference Manual
11-6
11
DecimateBlur
Blurs and decimates an
image.
void iplDecimateBlur (IplImage* srcImage ,
IplImage*
dstImage , int xDst , int xSrc , int yDst , int
ySrc , int interpolate , int xMaskSize , int yMaskSize );
srcImage Thesourceimage.
dstImage The resultant image.
xDst,xSrc,yDst,ySrc Positive integers specifying the fractions
xDst/xSrc ≤ 1and yDst/ySrc ≤ 1 - the factors
by which the x and y dimensions of the image’s
ROI are changed (similar to
iplDecimate).
interpolate The type of interpolation to perform for
resampling. Can be one of the following:
IPL_INTER_NN Nearest neighbor.
IPL_INTER_LINEAR Linear interpolation.
IPL_INTER_CUBIC Cubic interpolation.
xMaskSize,yMaskSize The x and y size of the blur mask.
Discussion
The function iplDecimateBlur() blurs the input image using an
xMaskSize by yMaskSize mask, then decimates the blurred image by a
factor of
xDst/xSrc in the x direction and yDst/ySrc in the y direction.
If mask rows and columns contain odd numbers of pixels, the mask anchor
is exactly at the center of the mask. Otherwise, the function rounds up the
center coordinates. Thus, in a 3x3 mask with top left corner at (0,0), the
anchor is at (1,2). In a 3x4 mask, the anchor would be at (1,2).
The interpolation specified by
interpolate is used for resampling the
input image.