Question

我下面的代码行在python中。我需要将其转换为等效的c++。.

lowH = 0
lowS = 150
lowV = 42

highH = 11
highS = 255
highV = 255

crop = 15
height = 40
perc = 23

hsv = cv2.cvtColor(img, cv2.COLOR_BGR2HSV)

threshold_img = cv2.inRange(hsv, (lowH, lowS, lowV), (highH, highS, highV))

x = 0
y = int(threshold_img.shape[0] * crop / 100)
w = int(threshold_img.shape[1])
h = int(threshold_img.shape[0] * height / 100)
img_cropped = threshold_img[y: y + h, x: x + w]

if cv2.countNonZero(threshold_img) < img_cropped.size * perc / 100:
    print("False")
else:
    print("True")

对于上面的代码，我已经在c++中进行了转换，如下所示：

int lowH = 0;
int lowS = 150;
int lowV = 42;

int highH = 11;
int highS = 255;
int highV = 255;

int crop = 15;
int height = 40;
int perc = 23;

cv::Mat hsv, threshold_img, img_cropped;

cv::cvtColor(img, hsv, cv::COLOR_BGR2HSV);

cv::inRange(hsv, cv::Scalar(lowH, lowS, lowV), cv::Scalar(highH, highS, highV), threshold_img);

int x = 0;
int y = int(threshold_img.reshape[0] * crop / 100);   <- error
int w = int(threshold_img.reshape[1]);                <- error
int h = int(threshold_img.reshape[0] * height / 100); <- error
img_cropped = threshold_img.resize[y + h, x + w];     <- error

if (cv::countNonZero(threshold_img) < img_cropped.size * perc / 100)
{
    cout << "False" << endl;
}

else
    cout << "TRUE" << endl;

但是上面的代码给出了错误

错误C2109下标需要数组或指针类型

还有此错误

错误（活动）E0349没有运算符“ *”与这些操作数匹配

在线

if (cv::countNonZero(threshold_img) < img_cropped.size * perc / 100)

在线

y = int(threshold_img.shape[0] * crop / 100)

没有shape可用，所以我使用了reshape。

任何人都可以指导我如何解决这些错误以及python代码中的作者正在尝试实现的目标，以便我可以轻松地在c ++中进行转换。请帮忙。谢谢

Answer 1

python-> c ++

threshold_img.shape[0] -> threshold_img.rows 
threshold_img.shape[1] -> threshold_img.cols

img_cropped.size-> Size（）此具有高度和宽度成员的对象，请参见

"cv2.countNonZero(threshold_img) < img_cropped.size * perc / 100" 
 countNonZero(threshold_img) < img_cropped.rows * img_cropped.cols * perc /100

img_cropped = threshold_img [y：y + h，x：x + w]是要获取threshold_img的子图像，该子图像从y到y + h以及从x到x +

img_cropped = threshold_img(Rect(x,y,w,h))

请注意检查x，y，宽度，高度，行，校准值，以确保我没有混淆轴

将cv2形状从python转换为c ++

1 个答案: