[FIXED] Rotate image in python and remove the background

Issue

Is there a way to rotate these kind of images and remove the background whitespace or any background and get and image like this

I tried to remove the background if the image doesn't have any rotation i am able to remove the background whitespace by using this script but if the image got any rotation it doesn't remove any space i followed this How to crop or remove white background from an image

import cv2
import numpy as np

img = cv2.imread('cheque_img\rotate.PNG')
## (1) Convert to gray, and threshold
gray = cv2.cvtColor(img, cv2.COLOR_BGR2GRAY)
th, threshed = cv2.threshold(gray, 240, 255, cv2.THRESH_BINARY_INV)

## (2) Morph-op to remove noise
kernel = cv2.getStructuringElement(cv2.MORPH_ELLIPSE, (11,11))
morphed = cv2.morphologyEx(threshed, cv2.MORPH_CLOSE, kernel)

## (3) Find the max-area contour
cnts = cv2.findContours(morphed, cv2.RETR_EXTERNAL, cv2.CHAIN_APPROX_SIMPLE)[-2]
cnt = sorted(cnts, key=cv2.contourArea)[-1]

## (4) Crop and save it
x,y,w,h = cv2.boundingRect(cnt)
dst = img[y:y+h, x:x+w]
cv2.imwrite("001.png", dst) 

Please try it with any scanned image and rotate it and try to get rid of the background white space and rotate it to its original dimension for doing computer vision operation

Solution

Considering you don't know the angle of the rotation and can be different for each scanned image, you need to find it first.

Combine what you already did with accepted answer for this question.

For the image you provided:

Angle is -25.953375702364195

Answered By - Dositej