CODEWITHSUNDEEP
opencv
Rose Perrone
Rose Perrone

Reputation: 63616

OpenCV rotated image has incorrect shape when displayed

I rotated the image from the left to the image on the right using 

image = cv2.warpAffine(image, R, dst_size, flags=cv2.INTER_LINEAR)

where dst_size is (547, 363), and I've modified R so that the original image should fit in the new dimensions. I show the image with cv2.imshow('rect post-rotation', img) to show the image on the right. You can see that it appears clipped to a size of (363, 547), even though when I print out the img shape, I get (547, 363, 3).

Why does the shape of the image not reflect the shape of the displayed image?

enter image description here

Upvotes: 1

Views: 305

Answers (1)

QED
QED

Reputation: 808

you need to set the destination size to the rotated size ie: 

   cv::Size dst_size(imOrig.size().height,imOrig.size().width);

alternatively you can use transpose and flip for 90 degree rotation:

   cv::Mat imRot90 = imOrig.t();   
   cv::flip(imRot90 ,imRot90 ,1);

cheers

Upvotes: 1

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