C语言中，怎么读取一个灰度（仅含黑白二色）位图的各个像素灰度值矩阵，并进行替换，输出替换后灰度矩阵所表示的位图

2015-04-30 10:26:17 674 阅读 AI 写同款 · GEO 优化AI 选题数据监测一键分发 ›

树莓派驱动OLED屏播放BadApple!!：从视频处理到GPIO控制的完整实践视频解码与图像处理是嵌入式系统开发中的基础技术，其核心原理涉及将连续的图像数据转换为设备可处理的数字信号。通过高效的算法和硬件加速，可以在资源受限的设备上实现流畅的视觉输出，这对于物联网和边缘计算场景具有重要价值。在实际应用中，开发者常需将处理后的视频数据通过GPIO接口驱动外部显示设备，如OLED屏幕，这要求对I2C/SPI通信协议和帧缓冲区管理有深入理解。本文以经典的BadApple!!影绘视频为例，详细讲解如何在树莓派上实现从视频预处理、帧率优化到GPIO驱动OLED屏播放的全流程，涵盖FFmpeg工阅读详情

如题，望各位高手不吝赐教

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RT-Thread Studio与CubeMX联合编程（超级详细） RT-Thread Studio与CubeMX联合编程本文章参考以下文章： https://blog.csdn.net/qq_40824852/article/details/122596043 https://zhuanlan.zhihu.com/p/395106066 https://blog.csdn.net/m0_37697335/article/details/108890584 一、简介经过上次对RT-Thread Studio的初步尝试，发现RT-Thread Studio中存在官方支阅读详情

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赵4老师 2015-04-30

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再供参考： Bitmap::SetPixel Method -------------------------------------------------------------------------------- The SetPixel method sets the color of a specified pixel in this bitmap. Syntax Status SetPixel( INT x, INT y, const Color &color ); Parameters x [in] int that specifies the x-coordinate (column) of the pixel. y [in] int that specifies the y-coordinate (row) of the pixel. color [in] Reference to a Color object that specifies the color to set. Return Value If the method succeeds, it returns Ok, which is an element of the Status enumeration. If the method fails, it returns one of the other elements of the Status enumeration. Remarks Depending on the format of the bitmap, GetPixel might not return the same value as was set by SetPixel. For example, if you call SetPixel on a Bitmap object whose pixel format is 32bppPARGB, the RGB components are premultiplied. A subsequent call to GetPixel might return a different value because of rounding. Also, if you call SetPixel on a Bitmap whose color depth is 16 bits per pixel, information could be lost in the conversion from 32 to 16 bits, and a subsequent call to GetPixel might return a different value. Example The following example creates a Bitmap object based on a JPEG file. The code draws the bitmap once unaltered. Then the code calls the SetPixel method to create a checkered pattern of black pixels in the bitmap and draws the altered bitmap. Show Example VOID Example_SetPixel(HDC hdc) { Graphics graphics(hdc); // Create a Bitmap object from a JPEG file. Bitmap myBitmap(L"Climber.jpg"); // Draw the bitmap. graphics.DrawImage(&myBitmap, 0, 0); // Create a checkered pattern with black pixels. for (UINT row = 0; row < myBitmap.GetWidth(); row += 2) { for (UINT col = 0; col < myBitmap.GetHeight(); col += 2) { myBitmap.SetPixel(row, col, Color(255, 0, 0, 0)); } } // Draw the altered bitmap. graphics.DrawImage(&myBitmap, 200, 0); } Method Information Stock Implementation gdiplus.dll Header Declared in Gdiplusheaders.h, include gdiplus.h Import library gdiplus.lib Minimum availability GDI+ 1.0 Minimum operating systems Windows 98/Me, Windows XP, Windows 2000, Windows NT 4.0 SP6 See Also Color, Bitmap::GetPixel, Image, Using Images, Bitmaps, and Metafiles, Images, Bitmaps, and Metafiles --------------------------------------------------------------------------------

赵4老师 2015-04-30

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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.jpg");
    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;
}

C语言中，怎么读取一个灰度（仅含黑白二色）位图的各个像素灰度值矩阵，并进行替换，输出替换后灰度矩阵所表示的位图

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