- 1 year ago
CV2.rectangle expects integer on windows but works with float on Ubuntu
The cv2.rectangle
function in OpenCV expects integer coordinates for drawing rectangles on images. The fact that it works with float coordinates on Ubuntu and fails on Windows suggests there might be a version difference or a configuration issue. To resolve this, ensure that you use integer coordinates for the cv2.rectangle
function on both platforms.
Here's how to fix the issue:
Ensure Integer Coordinates:
Make sure the coordinates passed to thecv2.rectangle
function are integers. If you are using float coordinates, convert them to integers using theint()
function.Example with integer coordinates:
pythonimport cv2
img = cv2.imread("image.jpg")
x1, y1 = 100, 100
x2, y2 = 300, 300
cv2.rectangle(img, (x1, y1), (x2, y2), (0, 255, 0), 2)
cv2.imshow("Image", img)
cv2.waitKey(0)
cv2.destroyAllWindows()
Example with float coordinates (incorrect):
pythonimport cv2
img = cv2.imread("image.jpg")
x1, y1 = 100.5, 100.5
x2, y2 = 300.5, 300.5
cv2.rectangle(img, (int(x1), int(y1)), (int(x2), int(y2)), (0, 255, 0), 2)
cv2.imshow("Image", img)
cv2.waitKey(0)
cv2.destroyAllWindows()
Check OpenCV Version:
Verify that you are using the same version of OpenCV on both Ubuntu and Windows. If you are using different versions, there might be variations in how the function handles float coordinates.You can check the OpenCV version in Python using
cv2.__version__
.Check Python Version:
Ensure that you are using the same version of Python on both platforms. Python 2 and Python 3 might have different behaviors with OpenCV functions.Reinstall OpenCV:
If the issue persists, consider reinstalling OpenCV on both platforms to ensure consistent behavior.Update Graphics Drivers:
Check and update your graphics drivers on both platforms to ensure compatibility with OpenCV.
By following these steps and using integer coordinates with cv2.rectangle
, your code should work consistently on both Windows and Ubuntu platforms. If the issue persists, it's possible that there might be other factors at play, such as differences in the underlying graphics libraries or hardware configurations.