gdal读取图像数据转opencv格式，opencv格式再转回gdal格式c++

可以使用以下代码将GDAL读取的图像数据转换为OpenCV格式：

#include <opencv2/opencv.hpp>
#include <gdal/gdal_priv.h>

int main()
{
    GDALAllRegister();

    // Open the GDAL dataset
    GDALDataset* dataset = (GDALDataset*)GDALOpen("input.tif", GA_ReadOnly);

    // Read the first band of the dataset
    GDALRasterBand* band = dataset->GetRasterBand(1);
    int width = band->GetXSize();
    int height = band->GetYSize();

    // Allocate memory for the image data
    uchar* data = new uchar[width * height];

    // Read the image data
    band->RasterIO(GF_Read, 0, 0, width, height, data, width, height, GDT_Byte, 0, 0);

    // Convert the image data to OpenCV format
    cv::Mat image(height, width, CV_8UC1, data);

    // Release the GDAL dataset
    GDALClose(dataset);

    // Do some OpenCV processing...

    // Convert the OpenCV image back to GDAL format
    GDALDriver* driver = GetGDALDriverManager()->GetDriverByName("GTiff");
    GDALDataset* outputDataset = driver->Create("output.tif", width, height, 1, GDT_Byte, NULL);
    GDALRasterBand* outputBand = outputDataset->GetRasterBand(1);
    outputBand->RasterIO(GF_Write, 0, 0, width, height, data, width, height, GDT_Byte, 0, 0);

    // Release the output GDAL dataset
    GDALClose(outputDataset);

    // Free the memory allocated for the image data
    delete[] data;

    return 0;
}

这段代码将读取名为“input.tif”的GDAL数据集的第一个波段，并将其转换为OpenCV格式的图像。然后，可以对图像进行任何OpenCV处理，并将其转换回GDAL格式，以便将其写入名为“output.tif”的输出文件中。