How to make crops from list of lists

Question

I have a list of n lists like this

pixels = [[400, 220, 515, 293], [433, 373, 482, 452], [401, 370, 477, 475]]

Each sublist correspond to the Top Left and Bottom Right Points for each crop

I made this code to extract a single crop from the whole list

  x1 = min(map(lambda x: x[0], pixels))
  y1 = min(map(lambda x: x[1], pixels))
  x2 = max(map(lambda x: x[2], pixels))
  y2 = max(map(lambda x: x[3], pixels))

  crop = img[y1:y2, x1:x2]
 cv2_imshow(crop)

How can I make n crops from n sublists?

Possible duplicate of https://stackoverflow.com/a/54885575/14653627 — juntunen, Mar 31 '22 at 05:27

Parthiban Marimuthu · Accepted Answer · 2022-04-01T06:50:08.670

2

Hope It will work

import cv2
pixels = [[400, 220, 515, 293], [433, 373, 482, 452], [401, 370, 477, 475]]
for i in pixels:
    img = cv2.imread(r"img _path")
    x1,y1,x2,y2 = i
    crop = img[y1:y2, x1:x2]

edited Apr 01 '22 at 06:50

answered Mar 31 '22 at 05:45

Parthiban Marimuthu

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Some comments explaining your solution would be useful. – stateMachine Mar 31 '22 at 06:21
Thanks a lot! It worked but the way to organize the points is as follows: x1,y1,x2,y2 = i – feruciform Apr 01 '22 at 06:41

How to make crops from list of lists

1 Answers1