[英]What does the error opencv error assertion failed (p [-1] <= 2) mean and how to deal with it?
I'm trying to translate the Mathlab code into pluses, using the OpenCV library. 我正在尝试使用OpenCV库将Mathlab代码转换为pluses。
On the line below: 在下面的行中:
resize (sig_temp, sig_temp, \
Size (sig_temp.size [0] / 2 + sig_temp.size [0]% 2, \
sig_temp.size [1] / 2 + sig_temp.size [1]% 2));
The program falls with an error: 该程序出错:
opencv error assertion failed (p[-1] <= 2) in cv::Matsize:: operator ()
The previous errors (dims <= 2, top / bottom / right / left> = 0)
were pretty obvious, because of them it was clear that the dimensions should not be more than two, the boundaries of the image should be non-negative. 先前的错误
(dims <= 2, top / bottom / right / left> = 0)
非常明显,因为这些错误很明显,尺寸不应超过两个,图像的边界应为非负数。 Immediately I do not understand what p [-1] means and why it should not be more than two (but I guess that here something is again connected with layers). 立即我不明白p [-1]的含义以及为什么它不应该大于2(但是我想这里有些东西又与层有关)。
sig_temp
- three-channel Mat matrix . sig_temp
三通道Mat矩阵。
cv::Size
takes int width, int height
as parameters. cv::Size
以int width, int height
为参数。 The 0th element of Mat::size
is height. Mat::size
的第0个元素是高度。
cv::Mat img = imread("image.jpg");
cout<<img.size()<<endl; // This line prints [columns x rows]
cout<<img.size[0]<<endl; // This line prints the rows
cout<<img.size[1]<<endl; // This line prints the columns
So in this line: 所以在这一行:
Size (sig_temp.size [0] / 2 + sig_temp.size [0]% 2, \
sig_temp.size [1] / 2 + sig_temp.size [1]% 2)
You're giving int height, int width
as parameters to cv::Size
which takes int width, int height
as params. 您正在将
int height, int width
作为参数提供给cv::Size
,该参数将int width, int height
作为参数。
You should use rows and cols to avoid confusion. 您应该使用行和列来避免混淆。
Size (sig_temp.cols / 2 + sig_temp.cols% 2, \
sig_temp.rows / 2 + sig_temp.rows% 2)
as far as i can understand from this: https://github.com/opencv/opencv/pull/8718/files MatSize::p is the array of dimension sizes. 据我据此了解: https : //github.com/opencv/opencv/pull/8718/files MatSize :: p是尺寸大小的数组。
p[-1] gives you amounts dimensions. p [-1]为您提供金额尺寸。 maybe your sig_temp matrix is 3 dimensional or more?
也许您的sig_temp矩阵是3维或更大的?
my suggestion is either use its reshape method of define sig_temp as 我的建议是使用定义sig_temp的重塑方法为
cv::Mat3b sig_temp;
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