Computer Vision Crash Course with OpenCV & Python  Quiz

What’s the benefit of mean subtraction as a preprocessing step. (Choose the best answer)

If I have an image of height 500 and width 800 and Now I want to resize the width to 400 then how much should I resize the height so the aspect ratio is maintained. 

Suppose we have a face ROI, Img_copy[100:150,80:120] how would we make it completely blue in color

Inorder to read the image in color mode which method do you use 

You cannot apply threshold on Color images

What is the size of the matrix used for rotation?

What does the last column of the matrix in affine transformation used for?

Our Image Classifier was trained on how many classes:

If your model was trained on pytorch then which method would you use to read that model?

If your face detector was making lots of false detections then which parameter would you tune.

Which of these kernel sizes will give you an error in Erosion or dilation.

If you don’t pass any parameter to the waitkey function then what will happen.