大家好我以下代码处理图片。我是c ++和vis studio的新手。该程序使用opencv所以我已经下载它并使我的项目指向构建配置中的必要库。当我尝试构建代码时，它似乎没有识别opencv变量。当我将opencv库添加到构建中时，有什么想法吗？
#include <cv.h>
#include <highgui.h>
#include <math.h>
#include <iostream>
#include "StdAfx.h"
void sampleImage(const IplImage* arr, float idx0, float idx1, CvScalar& res)
{
if(idx0<0 || idx1<0 || idx0>(cvGetSize(arr).height-1) || idx1>(cvGetSize(arr).width-1)){
res.val[0]=0;
res.val[1]=0;
res.val[2]=0;
res.val[3]=0;
return;
}
float idx0_fl=floor(idx0);
float idx0_cl=ceil(idx0);
float idx1_fl=floor(idx1);
float idx1_cl=ceil(idx1);
CvScalar s1=cvGet2D(arr,(int)idx0_fl,(int)idx1_fl);
CvScalar s2=cvGet2D(arr,(int)idx0_fl,(int)idx1_cl);
CvScalar s3=cvGet2D(arr,(int)idx0_cl,(int)idx1_cl);
CvScalar s4=cvGet2D(arr,(int)idx0_cl,(int)idx1_fl);
float x = idx0 - idx0_fl;
float y = idx1 - idx1_fl;
res.val[0]= s1.val[0]*(1-x)*(1-y) + s2.val[0]*(1-x)*y + s3.val[0]*x*y + s4.val[0]*x*(1-y);
res.val[1]= s1.val[1]*(1-x)*(1-y) + s2.val[1]*(1-x)*y + s3.val[1]*x*y + s4.val[1]*x*(1-y);
res.val[2]= s1.val[2]*(1-x)*(1-y) + s2.val[2]*(1-x)*y + s3.val[2]*x*y + s4.val[2]*x*(1-y);
res.val[3]= s1.val[3]*(1-x)*(1-y) + s2.val[3]*(1-x)*y + s3.val[3]*x*y + s4.val[3]*x*(1-y);
}
float xscale;
float yscale;
float xshift;
float yshift;
float getRadialX(float x,float y,float cx,float cy,float k){
x = (x*xscale+xshift);
y = (y*yscale+yshift);
float res = x+((x-cx)*k*((x-cx)*(x-cx)+(y-cy)*(y-cy)));
return res;
}
float getRadialY(float x,float y,float cx,float cy,float k){
x = (x*xscale+xshift);
y = (y*yscale+yshift);
float res = y+((y-cy)*k*((x-cx)*(x-cx)+(y-cy)*(y-cy)));
return res;
}
float thresh = 1;
float calc_shift(float x1,float x2,float cx,float k){
float x3 = x1+(x2-x1)*0.5;
float res1 = x1+((x1-cx)*k*((x1-cx)*(x1-cx)));
float res3 = x3+((x3-cx)*k*((x3-cx)*(x3-cx)));
// std::cerr<<"x1: "<<x1<<" - "<<res1<<" x3: "<<x3<<" - "<<res3<<std::endl;
if(res1>-thresh && res1 < thresh)
return x1;
if(res3<0){
return calc_shift(x3,x2,cx,k);
}
else{
return calc_shift(x1,x3,cx,k);
}
}
int main(int argc, char** argv)
{
IplImage* src = cvLoadImage( argv[1], 1 );
IplImage* dst = cvCreateImage(cvGetSize(src),src->depth,src->nChannels);
IplImage* dst2 = cvCreateImage(cvGetSize(src),src->depth,src->nChannels);
float K=atof(argv[3]);
float centerX=atoi(argv[4]);
float centerY=atoi(argv[5]);
int width = cvGetSize(src).width;
int height = cvGetSize(src).height;
xshift = calc_shift(0,centerX-1,centerX,K);
float newcenterX = width-centerX;
float xshift_2 = calc_shift(0,newcenterX-1,newcenterX,K);
yshift = calc_shift(0,centerY-1,centerY,K);
float newcenterY = height-centerY;
float yshift_2 = calc_shift(0,newcenterY-1,newcenterY,K);
// scale = (centerX-xshift)/centerX;
xscale = (width-xshift-xshift_2)/width;
yscale = (height-yshift-yshift_2)/height;
std::cerr<<xshift<<" "<<yshift<<" "<<xscale<<" "<<yscale<<std::endl;
std::cerr<<cvGetSize(src).height<<std::endl;
std::cerr<<cvGetSize(src).width<<std::endl;
for(int j=0;j<cvGetSize(dst).height;j++){
for(int i=0;i<cvGetSize(dst).width;i++){
CvScalar s;
float x = getRadialX((float)i,(float)j,centerX,centerY,K);
float y = getRadialY((float)i,(float)j,centerX,centerY,K);
sampleImage(src,y,x,s);
cvSet2D(dst,j,i,s);
}
}
#if 0
cvNamedWindow( "Source1", 1 );
cvShowImage( "Source1", dst);
cvWaitKey(0);
#endif
cvSaveImage(argv[2],dst,0);
#if 0
for(int j=0;j<cvGetSize(src).height;j++){
for(int i=0;i<cvGetSize(src).width;i++){
CvScalar s;
sampleImage(src,j+0.25,i+0.25,s);
cvSet2D(dst,j,i,s);
}
}
cvNamedWindow( "Source1", 1 );
cvShowImage( "Source1", src);
cvWaitKey(0);
#endif
}
1>------ Build started: Project: sherize, Configuration: Debug Win32 ------
1> sherize.cpp
1>c:\users\mat\documents\visual studio 2010\projects\sherize\sherize\sherize.cpp(1): warning C4627: '#include <cv.h>': skipped when looking for precompiled header use
1> Add directive to 'StdAfx.h' or rebuild precompiled header
1>c:\users\mat\documents\visual studio 2010\projects\sherize\sherize\sherize.cpp(2): warning C4627: '#include <highgui.h>': skipped when looking for precompiled header use
1> Add directive to 'StdAfx.h' or rebuild precompiled header
1>c:\users\mat\documents\visual studio 2010\projects\sherize\sherize\sherize.cpp(3): warning C4627: '#include <math.h>': skipped when looking for precompiled header use
1> Add directive to 'StdAfx.h' or rebuild precompiled header
1>c:\users\mat\documents\visual studio 2010\projects\sherize\sherize\sherize.cpp(4): warning C4627: '#include <iostream>': skipped when looking for precompiled header use
1> Add directive to 'StdAfx.h' or rebuild precompiled header
1>c:\users\mat\documents\visual studio 2010\projects\sherize\sherize\sherize.cpp(7): error C4430: missing type specifier - int assumed. Note: C++ does not support default-int
1>c:\users\mat\documents\visual studio 2010\projects\sherize\sherize\sherize.cpp(7): error C2143: syntax error : missing ',' before '*'
1>c:\users\mat\documents\visual studio 2010\projects\sherize\sherize\sherize.cpp(9): error C2065: 'idx0' : undeclared identifier
1>c:\users\mat\documents\visual studio 2010\projects\sherize\sherize\sherize.cpp(9): error C2065: 'idx1' : undeclared identifier
1>c:\users\mat\documents\visual studio 2010\projects\sherize\sherize\sherize.cpp(9): error C2065: 'idx0' : undeclared identifier
1>c:\users\mat\documents\visual studio 2010\projects\sherize\sherize\sherize.cpp(9): error C2065: 'arr' : undeclared identifier
1>c:\users\mat\documents\visual studio 2010\projects\sherize\sherize\sherize.cpp(9): error C2228: left of '.height' must have class/struct/union
1> type is ''unknown-type''
1>c:\users\mat\documents\visual studio 2010\projects\sherize\sherize\sherize.cpp(9): error C2065: 'idx1' : undeclared identifier
1>c:\users\mat\documents\visual studio 2010\projects\sherize\sherize\sherize.cpp(9): error C2065: 'arr' : undeclared identifier
1>c:\users\mat\documents\visual studio 2010\projects\sherize\sherize\sherize.cpp(9): error C2228: left of '.width' must have class/struct/union
1> type is ''unknown-type''
1>c:\users\mat\documents\visual studio 2010\projects\sherize\sherize\sherize.cpp(9): error C3861: 'cvGetSize': identifier not found
1>c:\users\mat\documents\visual studio 2010\projects\sherize\sherize\sherize.cpp(9): error C3861: 'cvGetSize': identifier not found
1>c:\users\mat\documents\visual studio 2010\projects\sherize\sherize\sherize.cpp(10): error C2065: 'res' : undeclared identifier
1>c:\
答案 0 :(得分：5)
这是因为您已将#include "stdafx.h"放在其他标题之后。这是VC ++的（默认）预编译头标记 - 它在此包含之前丢弃所有内容并加载其预编译头状态，即它忽略了cv.h include here。
这意味着您应该将stdafx.h include移动到文件顶部或将#include <cv.h>等移动到stdafx.h中。如果要将它们包含在项目的所有文件中，并且它们不太可能在构建之间进行更改，那么将它们添加到stdafx.h会将它们包含在预编译的头文件中，并且它们将自动（并且有效地）可用于项目中的所有资源。
答案 1 :(得分：1)
当您使用预编译头时，#include "stdafx.h"指令需要是所包含文件列表中的第一个。因此，将包含的顺序更改为
#include "StdAfx.h"
#include <cv.h>
#include <highgui.h>
#include <math.h>
#include <iostream>