import cv2
src = cv2.imread('D:/cv2-resize-image-original.png', cv2.IMREAD_UNCHANGED)
#percent by which the image is resized
scale_percent = 50
#calculate the 50 percent of original dimensions
width = int(src.shape[1] * scale_percent / 100)
height = int(src.shape[0] * scale_percent / 100)
# dsize
dsize = (width, height)
# resize image
output = cv2.resize(src, dsize)
cv2.imwrite('D:/cv2-resize-image-50.png',output)
cv2.resize(src, dsize[, dst[, fx[, fy[, interpolation]]]])