| Es++ Sample: GrayScaleImageWriter |

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*
* Copyright (c) 2017 Antillia.com TOSHIYUKI ARAI. ALL RIGHTS RESERVED.
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*
* GrayScaleImageWriter.cpp
*
*****************************************************************************/
#include <es++/opencv-4.0/OpenCVObject.h>
#include <es++/Exception.h>
#include <es++/File.h>
int main(int argc, char** argv)
{
if (argc != 3) {
printf("Usage: %s sourceImageFile grayScaleImageFile \n", argv[0]);
return 1;
}
try {
const char* filename = argv[1];
const char* grayscalename = argv[2];
Es::File file(filename);
if (file.exists() == false) {
throw Es::IException("File not found: %s", filename);
}
cv::Mat colorMat = cv::imread(filename, cv::IMREAD_COLOR);
if (colorMat.empty()) {
throw Es::IException("Failed to cv::imread file %s", filename);
}
cv::Mat grayMat;
cv::cvtColor(colorMat, grayMat, CV_BGR2GRAY);
//cv::imwrite(grayMat, "./flower.gray.png");
bool rc = cv::imwrite(grayscalename, grayMat);
if (rc == false) {
throw Es::IException("Failed to cv::imwrite: %s", grayscalename);
} else {
printf("Converted colorImagefile=%s to grayscaleImage=%s\n",
filename, grayscalename);
}
} catch (Es::Exception &ex) {
caught(ex);
}
}