[英]OpenCv image blocks, size error?
我有一個函數,使用C ++和OpenCv將圖像分割成塊以進行進一步處理。
這是我的代碼:
void imageSplit(Mat image)
{
int blockNumber = 8;
// get the image data
int height = image.rows;
int width = image.cols;
//set how many blocks and create vector to store
cv::Size smallSize(height / blockNumber, width / blockNumber);
std::vector < Mat > smallImages;
for (int y = 0; y < image.rows; y += smallSize.height)
{
for (int x = 0; x < image.cols; x += smallSize.width)
{
cv::Rect rect = cv::Rect(x, y, smallSize.width, smallSize.height);
//cout << x << " " << y << " " << smallSize.width << " " << smallSize.height << endl;
smallImages.push_back(cv::Mat(image, rect));
}
}
}
它適用於更大的區域(512 x 512工作)但是當我達到100 x 100 px的尺寸時,它給了我:
OpenCV Error: Assertion failed (0 <= roi.x && 0 <= roi.width && roi.x + roi.widt
h <= m.cols && 0 <= roi.y && 0 <= roi.height && roi.y + roi.height <= m.rows) in
cv::Mat::Mat, file src\matrix.cpp, line 323
default exception.
問題與尺寸有關嗎? 如果是這樣,有辦法嗎?
因為berak因為沒有真正提交問題答案而臭名昭着。
您的代碼需要是:
for (int y = 0; y < image.rows-smallSize.height; y += smallSize.height)
{
for (int x = 0; x < image.cols-smallSize.width; x += smallSize.width)
{
cv::Rect rect = cv::Rect(x, y, smallSize.width, smallSize.height);
//cout << x << " " << y << " " << smallSize.width << " " << smallSize.height << endl;
smallImages.push_back(cv::Mat(image, rect));
}
}
}
這是為了阻止您增加到實際上沒有圖像的區域。
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