怎么用c++读取灰度图bmp格式生成数组

moleishine 2018-07-30 03:25:15

图片有1000多张，我就有一点基础c++，可以把代码写出来，顺便标出来在哪里改吗

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赵4老师 2019-06-10

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无profiler不要谈效率！！尤其在这个云计算、虚拟机、模拟器、CUDA、多核、多级cache、指令流水线、多种存储介质、……满天飞的时代！

CT8100 2019-06-10

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引用 2 楼赵4老师的回复:

仅供参考：

#include <iostream>

#include <fstream>

#include <string>

#include <windows.h>

#include <gdiplus.h>

#pragma comment(lib, "gdiplus.lib")



using namespace std;

using namespace Gdiplus;



int main() {

    GdiplusStartupInput gdiplusstartupinput;

    ULONG_PTR gdiplustoken;

    GdiplusStartup(&gdiplustoken, &gdiplusstartupinput, NULL);



    wstring infilename(L"1.bmp");

    string outfilename("color.txt");



    Bitmap* bmp = new Bitmap(infilename.c_str());

    UINT height = bmp->GetHeight();

    UINT width  = bmp->GetWidth();

    cout << "width " << width << ", height " << height << endl;



    Color color;

    ofstream fout(outfilename.c_str());



    for (UINT y = 0; y < height; y++)

    for (UINT x = 0; x < width ; x++) {

            bmp->GetPixel(x, y, &color);

            fout << x << "," << y << ";"

                 << (int)color.GetRed()   << ","

                 << (int)color.GetGreen() << ","

                 << (int)color.GetBlue()  << endl;

    }



    fout.close();



    delete bmp;

    GdiplusShutdown(gdiplustoken);

    return 0;

}

四爷方法能实现～，就是这个api效率有点惨不忍睹～

stbdly 2019-06-10

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貌似jpg图像也是这样读取RGB值的，ofstream fout(outfilename.c_str());很关键

moleishine 2018-07-30

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图片的地址需要写吗 1.bmp是什么 color.txt是输出的文件吗

赵4老师 2018-07-30

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仅供参考：

#include <iostream>

#include <fstream>

#include <string>

#include <windows.h>

#include <gdiplus.h>

#pragma comment(lib, "gdiplus.lib")



using namespace std;

using namespace Gdiplus;



int main() {

    GdiplusStartupInput gdiplusstartupinput;

    ULONG_PTR gdiplustoken;

    GdiplusStartup(&gdiplustoken, &gdiplusstartupinput, NULL);



    wstring infilename(L"1.bmp");

    string outfilename("color.txt");



    Bitmap* bmp = new Bitmap(infilename.c_str());

    UINT height = bmp->GetHeight();

    UINT width  = bmp->GetWidth();

    cout << "width " << width << ", height " << height << endl;



    Color color;

    ofstream fout(outfilename.c_str());



    for (UINT y = 0; y < height; y++)

    for (UINT x = 0; x < width ; x++) {

            bmp->GetPixel(x, y, &color);

            fout << x << "," << y << ";"

                 << (int)color.GetRed()   << ","

                 << (int)color.GetGreen() << ","

                 << (int)color.GetBlue()  << endl;

    }



    fout.close();



    delete bmp;

    GdiplusShutdown(gdiplustoken);

    return 0;

}