cvSplit()是openCV中的一个函数,它分别复制每个通道到多个单通道图像。
void cvSplit( const CvArr* src, CvArr* dst0, CvArr* dst1, CvArr* dst2, CvArr* dst3 );.cvSplit()函数将复制src的各个通道到图像dst0,dst1,dst2和dst3中。如果源图像少于4个通道的情况下,那么传递给cvSplit()的不必要的目标参数可设置为NULL。
cvSum函数
其结构
CvScalar cvSum(//计算arr各通道所有像素总和 CvArr* arr//目标矩阵 );
js
program cv_Sum;
{$APPTYPE CONSOLE}
{$R *.res}
uses
System.SysUtils,
ocv.highgui_c,
ocv.core_c,
ocv.core.types_c,
ocv.imgproc_c,
ocv.imgproc.types_c,
uResourcePaths;
const
filename = cResourceMedia + 'cat2.jpg';
var
img: pIplImage;
channels: array [0 .. 2] of pIplImage;
BGRSum: Array [0 .. 2] of TCvScalar;
i, total: Integer;
begin
try
img := cvLoadImage(filename);
for i := 0 to 2 do
channels[i] := cvCreateImage(cvGetSize(img), 8, 1);
cvSplit(img, channels[0], channels[1], channels[2]);
for i := 0 to 2 do
BGRSum[i] := cvSum(channels[i]);
total := img^.width * img^.height * 255;
WriteLn('Color percentage of RGB(ex red 50%, green 25% and blue %25) in an image is');
WriteLn('red: ', BGRSum[2].val[0] / total * 100:2:2);
WriteLn('green: ', BGRSum[1].val[0] / total * 100:2:2);
WriteLn('blue: ', BGRSum[0].val[0] / total * 100:2:2);
cvNamedWindow('channels0');
cvShowImage('channels0', channels[0]);
cvNamedWindow('channels1');
cvShowImage('channels1', channels[1]);
cvNamedWindow('channels2');
cvShowImage('channels2', channels[2]);
cvWaitKey();
readln;
except
on E: Exception do
WriteLn(E.ClassName, ': ', E.Message);
end;
end.