• 图像旋转由16*16扩展存入20*20的分块


    扩展为存入20*20的分块,需要改动的地方:

    • 预设blockSrc[ ]扩展为400。
    • 存入时,分块改为20*20的循环。
    • 映射后的块初始点本身为(16*block_numx-16,16*block_numy-16),扩展为20*20是周围补了两圈,因此块初始点应该行列各减2,变为(16*block_numx-16,16*block_numy-16)。
    • 由原图中的距离xOr,yOr,映射到块内相对的xOr,yOr,还需要改一下(16*block_numx-16,16*block_numy-16)。
    • 最后利用分块存入的数组信息blockSrc[ ]时,求其对应位置时,iWidth要变为20。

    16*16四周扩展2圈

    考虑到由于扩展-2-2,xOr和yOr也要对应变一下:

    改为20*20的Width,OK了。

     

    // RotateZoom.cpp : Defines the entry point for the console application.
    //
    
    #include "stdafx.h"
    #include "RotateZoom.h"
    
    
    #ifdef _DEBUG
    #define new DEBUG_NEW
    #endif
    #include <atlimage.h>
    #include <locale.h>
    
    // The one and only application object
    
    CWinApp theApp;
    
    using namespace std;
    //双三次插值系数
    double fs(double w)
    {    
            double a=-0.5;
            double fs;
            if (abs(w)<=1)
                fs=(a+2)*pow(abs(w),3)-(a+3)*pow(abs(w),2)+1;
            else if (abs(w)>1&&abs(w)<=2)
                fs=a*pow(abs(w),3)-5*a*pow(abs(w),2)+8*a*abs(w)-4*a;
            else
                fs=0;
            return fs;
    }
    
    HRESULT RotateZoom(PBYTE pbSrc,int iWidth,int iHeight,double dbRotate,double dbZoom,PBYTE pbTag);
    int _tmain(int argc, TCHAR* argv[], TCHAR* envp[])
    {
        int nRetCode = 0;
    
        setlocale(LC_ALL,"chs");
        HMODULE hModule = ::GetModuleHandle(NULL);
        if (hModule != NULL)
        {
            // initialize MFC and print and error on failure
            CImage cImage;
            HRESULT hResult;
            int        iWidth,iHeight,iBytePerPixel,iPitch;
            int        i,j,x,y,w,h;
            PBYTE    pbSrc=NULL,pbTag=NULL;
            PBYTE    pbImage=NULL;
            PDWORD    pdwImage=NULL;
            double    dbRotate=0,dbZoom=0;
            double    dbRotateStart=0,dbRotateEnd=0,dbRotateStep;
            double    dbZoomStart=0,dbZoomEnd=0,dbZoomStep;
            BOOL    bBenchWork=FALSE;
            CString csSrcName,csTagName,csNameRoot;
            TCHAR    *ptChar;
            do{
                if (!AfxWinInit(hModule, NULL, ::GetCommandLine(), 0))
                {
                    // TODO: change error code to suit your needs
                    _tprintf(_T("Fatal Error: MFC initialization failed
    "));
                    nRetCode = 1;
                    break;
                }
                // TODO: code your application's behavior here.
                if(argc!=6 && argc!=10 )
                {
                    _tprintf(_T("使用方法:
      RotateZoom -S 源图像文件 旋转角度 缩放倍数 输出文件
    或:
      RotateZoom -B 源图像文件 旋转起始角度 步长 旋转终止角度 缩放起始倍数 步长 缩放终止倍数 输出文件
    "));
                    nRetCode= -1;
                    break;
                }
                if(_tcsnicmp(argv[1],_T("-B"),2)==0)
                {
                    bBenchWork=TRUE;
                }
                else if(_tcsnicmp(argv[1],_T("-S"),2)==0)
                {
                    bBenchWork=FALSE;
                }
                else
                {
                    _tprintf(_T("使用方法:
      RotateZoom -S 源图像文件 旋转角度 缩放倍数 输出文件
    或:
    RotateZoom -B 源图像文件 旋转起始角度 步长 旋转终止角度 缩放起始倍数 步长 缩放终止倍数 输出文件
    "));
                    nRetCode= -1;
                    break;
                }
                if(bBenchWork)
                {
                    csSrcName=argv[2];
                    _stscanf(argv[3],_T("%lf"),&dbRotateStart);
                    _stscanf(argv[4],_T("%lf"),&dbRotateStep);
                    _stscanf(argv[5],_T("%lf"),&dbRotateEnd);
                    _stscanf(argv[6],_T("%lf"),&dbZoomStart);
                    _stscanf(argv[7],_T("%lf"),&dbZoomStep);
                    _stscanf(argv[8],_T("%lf"),&dbZoomEnd);
                    dbZoom=dbZoomStart>dbZoomEnd?dbZoomStart:dbZoomEnd;
                    csTagName=argv[9];
                    if(!((dbRotateStart>=0 && dbRotateStart<360) && 
                         (dbRotateEnd>=0 && dbRotateEnd<360)     &&
                         (dbZoomStart>=0.26 && dbZoomStart<=16)  && 
                         (dbZoomStart>=0.25 && dbZoomStart<=16)  &&
                         (dbRotateStep>=0.01) && (dbZoomEnd>=0.01)))
                    {
                        _tprintf(_T("旋转角度范围(0~360),缩放倍数范围(0.25~16),步长范围(>=0.01)。输入参数超出范围!
    "));
                        nRetCode= -2;
                        break;
                    }    
                }
                else
                {
                    csSrcName=argv[2];
                    _stscanf(argv[3],_T("%lf"),&dbRotate);
                    _stscanf(argv[4],_T("%lf"),&dbZoom);
                    csTagName=argv[5];
                    if(!((dbRotate>=0 && dbRotate<360) && (dbZoom>=0.25 && dbZoom<=16)))
                    {
                        _tprintf(_T("旋转角度范围(0~360),缩放倍数范围(0.25~16)。输入参数超出范围!
    "));
                        nRetCode= -2;
                        break;
                    }            
                }
    
                hResult=cImage.Load(csSrcName);
                if(hResult!=ERROR_SUCCESS)
                {
                    _tprintf(_T("源图像文件名错误!
    "));
                    nRetCode= -3;
                    break;
                }
                iWidth=cImage.GetWidth();
                iHeight=cImage.GetHeight();
                pbSrc = (PBYTE)malloc(iWidth*iHeight);//存原图数据大小没问题
                if(dbZoom>1) pbTag = (PBYTE)malloc(ceil(iWidth*dbZoom)*ceil(iHeight*dbZoom));
                else         pbTag = (PBYTE)malloc(iWidth*iHeight);
                if(pbSrc==NULL || pbTag==NULL )
                {
                    _tprintf(_T("内存申请错误!
    "));
                    nRetCode= -4;
                    break;
                }
                iPitch=cImage.GetPitch();
                iBytePerPixel=(cImage.GetBPP()+7)/8;
                if(iBytePerPixel==3)
                {
                    for(y=0;y<iHeight;y++)
                    {
                        pbImage=(PBYTE)(PBYTE(cImage.GetBits())+iPitch*y);//得到的是图像初始像素地址
                        for(x=0;x<iWidth;x++)
                        {
                            pbSrc[y*iWidth+x]=(pbImage[3*x]*0.15+pbImage[3*x+1]*0.55+pbImage[3*x+2]*0.3);//转换成灰度就是单个像素了,分配大小还是原来的?。
                        }
                    }
                }
                cImage.Destroy();
    
                csTagName.Trim();
                csTagName.MakeUpper();        
                if(bBenchWork)
                {
    
                    if(csTagName.Right(4)!=_T(".BMP") ) csNameRoot=csTagName;
                    else csNameRoot=csTagName.Left (csTagName.GetLength()-4);
                    j=0;
                    for(dbZoom=dbZoomStart;dbZoom<=dbZoomEnd;dbZoom+=dbZoomStep)
                    {
                        w=ceil(iWidth*dbZoom);
                        h=ceil(iHeight*dbZoom);
                        cImage.Create(w,-h,32);
                        iPitch=cImage.GetPitch();                    
                        for(dbRotate=dbRotateStart;dbRotate<=dbRotateEnd;dbRotate+=dbRotateStep)
                        {
                            hResult=RotateZoom(pbSrc,iWidth,iHeight,dbRotate,dbZoom,pbTag);
                            if(hResult!=ERROR_SUCCESS)
                            {
                                _tprintf(_T("图像处理错误!
    "));
                                nRetCode= -5;
                                break;
                            }
    
                            for(y=0;y<h;y++)
                            {
                                pdwImage=(PDWORD)(PBYTE(cImage.GetBits())+iPitch*y);
                                for(x=0;x<w;x++)
                                {
                                    pdwImage[x]=pbTag[y*w+x]*0x10101;  
                                }
                            }    
                            csTagName=csNameRoot;
                            csTagName.AppendFormat(_T("_Z%05.2f_R%06.2f.BMP"),dbZoom,dbRotate);            
                            hResult=cImage.Save(csTagName,Gdiplus::ImageFormatBMP);
                            if(hResult!=ERROR_SUCCESS)
                            {
                                _tprintf(_T("图像结果保存错误!
    "));
                                nRetCode= -5;
                                break;
                            }
                            i=csTagName.GetLength();
                            ptChar=csTagName.GetBuffer(i+1);
                            ptChar[i]=_T('');
                            _tprintf(_T("图像处理成功!%s
    "),ptChar);
                            csTagName.ReleaseBuffer();
                            nRetCode= ERROR_SUCCESS;
                            j++;
                        }
                        cImage.Destroy();
                        if(nRetCode!=ERROR_SUCCESS) break;
                    }
                    if(nRetCode==ERROR_SUCCESS) _tprintf(_T("批处理完成!共处理%d
    "),j);
                    else                        _tprintf(_T("批处理出错!已处理%d
    "),j);
                }
                else
                {
                    hResult=RotateZoom(pbSrc,iWidth,iHeight,dbRotate,dbZoom,pbTag);
                    if(hResult!=ERROR_SUCCESS)
                    {
                        _tprintf(_T("图像处理错误!
    "));
                        nRetCode= -5;
                        break;
                    }
                    iWidth=ceil(iWidth*dbZoom);
                    iHeight=ceil(iHeight*dbZoom);
                    cImage.Create(iWidth,-iHeight,32);
                    iPitch=cImage.GetPitch();
                    for(y=0;y<iHeight;y++)
                    {
                        pdwImage=(PDWORD)(PBYTE(cImage.GetBits())+iPitch*y);
                        for(x=0;x<iWidth;x++)
                        {
                            pdwImage[x]=pbTag[y*iWidth+x]*0x10101;  
                        }
                    }    
                    if(csTagName.Right(4)!=_T(".BMP") ) csTagName.Append(_T(".BMP"));
                    hResult=cImage.Save(csTagName,Gdiplus::ImageFormatBMP);
                    if(hResult!=ERROR_SUCCESS)
                    {
                        _tprintf(_T("图像结果保存错误!
    "));
                        nRetCode= -5;
                        break;
                    }
                    i=csTagName.GetLength();
                    ptChar=csTagName.GetBuffer(i+1);
                    ptChar[i]=_T('');
                    _tprintf(_T("图像处理成功!%s
    "),ptChar);
                    csTagName.ReleaseBuffer();
                    nRetCode= ERROR_SUCCESS;
                }
                break;
            }while(0);
            if(pbSrc) free(pbSrc);
            if(pbTag) free(pbTag);
        }
        else
        {
            // TODO: change error code to suit your needs
            _tprintf(_T("Fatal Error: GetModuleHandle failed
    "));
            nRetCode = 1;
        }
        _tprintf(_T("按任意键退出!"));
        getchar();    
        return nRetCode;
    }
    HRESULT RotateZoom(PBYTE pbSrc,int iWidth,int iHeight,double dbRotate,double dbZoom,PBYTE pbTag)
    {
        double phase[33]={0};//16相位,包含端点存在33个距离
        for (int i=0;i<33;i++)
        {
            double i2=1.0*i;
            phase[i]=fs(i2/16);
        }
        int size;
        if(dbZoom>1)
        {
            size=iWidth*iHeight;
        }
        else
        {
            size=ceil(iWidth*dbZoom)*ceil(iHeight*dbZoom);
        }
        int newWidth=ceil(dbZoom*iWidth);
        //旋转中心为图像中心
        double rx0=ceil(dbZoom*iWidth)*0.5;  
        double ry0=ceil(dbZoom*iHeight)*0.5; 
        double srcx,srcy,u,v;
        int xOr,yOr;
        dbRotate=dbRotate*3.1415926/180.0;
        int xo=0,yo=0;
             for(int y=yo;y<ceil(dbZoom*iHeight);y++)
                {
                    for(int x=xo;x<ceil(dbZoom*iWidth);x++)
                    {
                        srcx=(double)((x-rx0)*cos(dbRotate) - (y-ry0)*sin(dbRotate) + rx0) ;
                        srcy=(double)((x-rx0)*sin(dbRotate) + (y-ry0)*cos(dbRotate) + ry0) ;
                        srcx=srcx*1/dbZoom;
                        srcy=srcy*1/dbZoom;
                        xOr = floor(srcx);
                        yOr = floor(srcy);
                        if( !(xOr-2>=0 && xOr+2<=iWidth && yOr-2>=0 && yOr+2<=iHeight))
                        {
                            pbTag[y*newWidth+x]=0;//255
                        }
                        else
                        {
                            u=srcx-xOr;
                            v=srcy-yOr;
                            int phasex=floor(16*u+0.5);//16相位
                            int phasey=floor(16*v+0.5);
    
                            double A1,B1,C1,D1,A2,B2,C2,D2;
                            A1=phase[16+phasex];
                            B1=phase[phasex];
                            C1=phase[16-phasex];
                            D1=phase[32-phasex];
                            A2=phase[16+phasey];
                            B2=phase[phasey];
                            C2=phase[16-phasey];
                            D2=phase[32-phasey];
    
                            int newWidth=ceil(dbZoom*iWidth);
                            int block_numx=ceil((xOr+1.0)/16);
                            int block_numy=ceil((yOr+1.0)/16);
    
                            double blockSrc[400]={0};
                            int newcount=0;
                            //int k=0,l=0;
                            //分块存储进数组blockSrc[]中
                            for(int k=0;k<20;k++)
                            {
                                for(int l=0;l<20;l++)
                                {
                                    int oldcount=(16*block_numy-16+k-2)*iWidth+16*block_numx-16-2+l;   
                                    blockSrc[newcount]=pbSrc[oldcount];
                                    //pbTag[newcount]=pbSrc[oldcount];
                                    newcount++;
                                    //cout<<oldcount<<endl;
                                }
                            }//分块存入完毕
                            //映射到16×16块内的初始点位置
                            xOr=xOr-(16*block_numx-16-2);
                            yOr=yOr-(16*block_numy-16-2);
                            //变为18*18块后直接运算即可
                            //if(xOr>=1 && xOr<=14 && yOr>=1 && yOr<=14)
                            //    pbTag[y*newWidth+x]=blockSrc[yOr*16+xOr];
                            //20*20d
                                double middle=
                                    blockSrc[(yOr-1)*20+(xOr-1)]*A1*A2+
                                    blockSrc[(yOr)*20+(xOr-1)]*A1*B2+
                                    blockSrc[(yOr+1)*20+(xOr-1)]*A1*C2+
                                    blockSrc[(yOr+2)*20+(xOr-1)]*A1*D2+
    
                                    blockSrc[(yOr-1)*20+(xOr)]*B1*A2+
                                    blockSrc[(yOr)*20+(xOr)]*B1*B2+
                                    blockSrc[(yOr+1)*20+(xOr)]*B1*C2+
                                    blockSrc[(yOr+2)*20+(xOr)]*B1*D2+
    
                                    blockSrc[(yOr-1)*20+(xOr+1)]*C1*A2+
                                    blockSrc[(yOr)*20+(xOr+1)]*C1*B2+
                                    blockSrc[(yOr+1)*20+(xOr+1)]*C1*C2+
                                    blockSrc[(yOr+2)*20+(xOr+1)]*C1*D2+
    
                                    blockSrc[(yOr-1)*20+(xOr+2)]*D1*A2+
                                    blockSrc[(yOr)*20+(xOr+2)]*D1*B2+
                                    blockSrc[(yOr+1)*20+(xOr+2)]*D1*C2+
                                    blockSrc[(yOr+2)*20+(xOr+2)]*D1*D2;
                                if(middle<=255&&middle>=0)
                                    pbTag[y*newWidth+x]=middle;
                                else if(middle>255)
                                    pbTag[y*newWidth+x]=255;
                                else 
                                    pbTag[y*newWidth+x]=0;
                        }
                    }             
                }
        return ERROR_SUCCESS;
    }
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  • 原文地址:https://www.cnblogs.com/wxl845235800/p/9409518.html
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