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#include <highgui.h>
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#include <cv.h>
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#include <stdio.h>
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#pragma
comment (lib,"opencv_calib3d231d.lib")
6
#pragma
comment (lib,"opencv_contrib231d.lib")
7
#pragma
comment (lib,"opencv_core231d.lib")
8
#pragma
comment (lib,"opencv_features2d231d.lib")
9
#pragma
comment (lib,"opencv_flann231d.lib")
10
#pragma
comment (lib,"opencv_gpu231d.lib")
11
#pragma
comment (lib,"opencv_haartraining_engined.lib")
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#pragma
comment (lib,"opencv_highgui231d.lib")
13
#pragma
comment (lib,"opencv_imgproc231d.lib")
14
#pragma
comment (lib,"opencv_legacy231d.lib")
15
#pragma
comment (lib,"opencv_ml231d.lib")
16
#pragma
comment (lib,"opencv_objdetect231d.lib")
17
#pragma
comment (lib,"opencv_ts231d.lib")
18
#pragma
comment (lib,"opencv_video231d.lib")
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/*
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*《学习OpenCV》第三章第三题
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* 完成时间：1:34 3/2 星期六 2013
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*/
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#define
ROWS 400
//
矩阵行数
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#define
COLS 400
//
矩阵列数
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//
定义绿色长方形的两个顶点
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CvPoint point1 = cvPoint(
80
,
20
);
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CvPoint point2 = cvPoint(
160
,
80
);
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//
Help function
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//
检查当前点是否在要画的长方形区域内
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bool
isThePointInRectangle(
int
x,
int
y)
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{
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if
( (x <= point2.x) && (y <=
point2.y)
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& (x >= point1.x) && (y >=
point1.y))
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return
true
;
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else
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return
false
;
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}
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int
main()
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{
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//
三通道的二维字节类型矩阵
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CvMat* mat =
cvCreateMat(ROWS, COLS, CV_8UC3);
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//
将所有数值初始化为零
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cvZero(mat);
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//
获得矩阵元素(0,0)的指针
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uchar *p = (uchar*)cvPtr2D(mat,
0
,
0
);
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//
为矩阵赋值，画长方形
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for
(
int
i =
0
; i < mat->cols; i++
)
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{
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for
(
int
j =
0
; j < mat->rows; j++
)
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{
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p = (uchar*
)cvPtr2D(mat, i, j);
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//
使其指向中间的通道
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p++
;
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if
(isThePointInRectangle(i, j) ==
true
)
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{
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*p =
255
;
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}
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p++
;
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}
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}
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cvShowImage(
"
img
"
, mat);
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cvWaitKey(
0
);
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cvReleaseMat(&
mat);
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cvDestroyAllWindows();
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return
0
;
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}
运行结果：
