Specifications

Intel
®
Image Processing Library Reference Manual
11-4
11
Zoom
Zooms or expands an
image.
void iplZoom(IplImage* srcImage , IplImage* dstImage , int
xDst , int xSrc , int yDst , int ySrc , int interpolate );
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. For example, setting
xDst =2, xSrc =1, yDst =2, ySrc =1
doubles the image size in each dimension to
increase the image area by a factor of four.
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.
Discussion
The function iplZoom() zooms or expands the source image srcImage
by xDst/xSrc in the x direction and yDst/ySrc in the y direction. The
interpolation specified by
interpolate is used for resampling the input
image.