I need the explanation on boundingRect of OpenCV. I have implemented it, it works great. Is there any reference where this function is fully explained please?
Working of selectROI() Function in OpenCV The bounding box is an imaginary rectangle drawn around a given object and it serves as the region of interest. To draw a bounding box around an object in the given image, we make use of a function called selectROI() function in OpenCV.
The cv2.boundingRect()
function of OpenCV is used to draw an approximate rectangle around the binary image. This function is used mainly to highlight the region of interest after obtaining contours from an image.
As per the documentation there are two types of bounding rectangles:
Here a simple rectangle is drawn around the contour (ROI). As you can see in the documentation, a green rectangle is drawn around the ROI. Corresponding rectangle coordinates are obtained such that a rectangle completely encloses the contour.
cv2.minAreaRect()
function is used to highlight the minimum rectangular area enclosing a contour.cv2.boxPoints()
obtains the 4 corner points of the obtained rectangle.np.int0()
is done to convert the corrdinates from float
to integer
format.If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
Donate Us With