Resize an image without distortion OpenCV

Question

I am using python 3 and latest version of openCV. I am trying to resize an image using the resize function provided but after resizing the image is very distorted. Code :

Answer 1

I have a dataset of hand drawings and i needed to create small square images from asymmetric drawings.

Thanks to @vijay jha i created square images while maintaining the aspect ratio of the original image. One issue though was that the more you downscaled the more information was lost.

512x256 to 64x64 would look like this:

I modified a bit the original code to smoothly downscale the image.

from skimage.transform import resize, pyramid_reduce


def get_square(image, square_size):

    height, width = image.shape    
    if(height > width):
      differ = height
    else:
      differ = width
    differ += 4

    # square filler
    mask = np.zeros((differ, differ), dtype = "uint8")

    x_pos = int((differ - width) / 2)
    y_pos = int((differ - height) / 2)

    # center image inside the square
    mask[y_pos: y_pos + height, x_pos: x_pos + width] = image[0: height, 0: width]

    # downscale if needed
    if differ / square_size > 1:
      mask = pyramid_reduce(mask, differ / square_size)
    else:
      mask = cv2.resize(mask, (square_size, square_size), interpolation = cv2.INTER_AREA)
    return mask

512x256 -> 64x64

512x256 -> 28x28