Java- OpenCV 错误：OpenCV 错误：断言失败（dims <= 2 && step[0] > 0）
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Java- OpenCV Error: OpenCV Error: Assertion failed (dims <= 2 && step[0] > 0)
提问by Juan M. Guevara Jiménez
I have this opencv code. Which makes a convolution to an image that I found in a page. I wanted to try it, but it gives the following error and I do not know much about openCV. I need help.
我有这个 opencv 代码。这对我在页面中找到的图像进行了卷积。我想尝试一下，但它给出了以下错误，而且我对 openCV 了解不多。我需要帮助。
Error: OpenCV Error: Assertion failed (dims <= 2 && step[0] > 0) in cv::Mat::locateROI, file C:\build\master_winpack-bindings-win64-vc14-static\opencv\modules\core\src\matrix.cpp, line 949
错误：OpenCV 错误：断言失败（dims <= 2 && step[0] > 0）在 cv::Mat::locateROI，文件 C:\build\master_winpack-bindings-win64-vc14-static\opencv\modules\core \src\matrix.cpp，第 949 行
public class main {
public static void main (String [ ] args) {
System.out.println ("hola");
try {
int kernelSize = 3;
System.loadLibrary( Core.NATIVE_LIBRARY_NAME );
Mat source = Imgcodecs.imread("logo.png", Imgcodecs.CV_LOAD_IMAGE_GRAYSCALE);
Mat destination = new Mat(source.rows(),source.cols(),source.type());
Mat kernel = new Mat(kernelSize,kernelSize, CvType.CV_32F){
{
put(0,0,0);
put(0,1,0);
put(0,2,0);
put(1,0,0);
put(1,1,1);
put(1,2,0);
put(2,0,0);
put(2,1,0);
put(2,2,0);
}
};
Imgproc.filter2D(source, destination, -1, kernel);
Imgcodecs.imwrite("original.jpg", destination);
} catch (Exception e) {
System.out.println("Error: " + e.getMessage());
}
}
}
public class main {
public static void main (String [ ] args) {
System.out.println ("hola");
try {
int kernelSize = 3;
System.loadLibrary( Core.NATIVE_LIBRARY_NAME );
Mat source = Imgcodecs.imread("logo.png", Imgcodecs.CV_LOAD_IMAGE_GRAYSCALE);
Mat destination = new Mat(source.rows(),source.cols(),source.type());
Mat kernel = new Mat(kernelSize,kernelSize, CvType.CV_32F){
{
put(0,0,0);
put(0,1,0);
put(0,2,0);
put(1,0,0);
put(1,1,1);
put(1,2,0);
put(2,0,0);
put(2,1,0);
put(2,2,0);
}
};
Imgproc.filter2D(source, destination, -1, kernel);
Imgcodecs.imwrite("original.jpg", destination);
} catch (Exception e) {
System.out.println("Error: " + e.getMessage());
}
}
}
回答by EikeMike
Had the same error and followed the very valuable hint of @Miki. In my case the image wasn't loaded properly because of unsuitable bit-depth. 32 instead of 8 bit for a greyscale image.
有同样的错误，并遵循了@Miki 的非常有价值的提示。在我的情况下，由于位深不合适，图像没有正确加载。32 位而不是灰度图像的 8 位。
回答by fzk
I had the same error, I wrote png instead of jpg in the file name. Make sure you load image with the proper extension/name
我有同样的错误，我在文件名中写了 png 而不是 jpg。确保使用正确的扩展名/名称加载图像
回答by Bea
I had the same exact error before so when I wrote the whole path of the picture, My code worked very well , so be careful with the extension of the image and make sure that your picture exists
我之前也有同样的错误，所以当我写了图片的整个路径时，我的代码运行良好，所以要小心图片的扩展名并确保你的图片存在
Here is what I did :
这是我所做的：
pic = cv2.imread('C:\Users\WSI\Desktop\python_scripts\hakuoki.jpg',cv2.IMREAD_COLOR)
回答by Quang Hoang
It looks like your source and destination are single channel while your kernel is 3 channels.
看起来您的源和目标是单通道，而您的内核是 3 个通道。
