/Python/Stackoverflow ocr,cropping letters

Stackoverflow ocr,cropping letters

import cv2
import numpy as np

#import image
image = cv2.imread('image.png')

#grayscale
gray = cv2.cvtColor(image,cv2.COLOR_BGR2GRAY)
cv2.imshow('gray', gray)
cv2.waitKey(0)

#binary
ret,thresh = cv2.threshold(gray,127,255,cv2.THRESH_BINARY_INV)
cv2.imshow('second', thresh)
cv2.waitKey(0)

#dilation
kernel = np.ones((1,1), np.uint8)
img_dilation = cv2.dilate(thresh, kernel, iterations=1)
cv2.imshow('dilated', img_dilation)
cv2.waitKey(0)

#find contours
im2,ctrs, hier = cv2.findContours(img_dilation.copy(), cv2.RETR_EXTERNAL, cv2.CHAIN_APPROX_SIMPLE)

#sort contours
sorted_ctrs = sorted(ctrs, key=lambda ctr: cv2.boundingRect(ctr)[0])

for i, ctr in enumerate(sorted_ctrs):
    # Get bounding box
    x, y, w, h = cv2.boundingRect(ctr)

    # Getting ROI
    roi = image[y:y+h, x:x+w]

    # show ROI
    #cv2.imshow('segment no:'+str(i),roi)
    cv2.rectangle(image,(x,y),( x + w, y + h ),(0,255,0),2)
    #cv2.waitKey(0)

    if w > 15 and h > 15:
        cv2.imwrite('roi{}.png'.format(i), roi)

cv2.imshow('marked areas',image)
cv2.waitKey(0)

Source: stackoverflow.com

Similar codes

25 votes163 views3 answers
Pyperclip
Python
1 vote165 views3 answers
Python venv flask
Python
25 votes169 views6 answers
Python remove spaces
Python
0 vote121 views1 answer
Triangle quest
Python
0 vote170 views1 answer
COMBINE TWO 2-D NUMPY ARRAYS WITH NP.VSTACK
Python
1 vote171 views1 answer
Placeholder tkinter
Python
0 vote171 views1 answer
Make screen shot of specific part of screen python
Python
3 votes155 views2 answers
Run python notepad++
Python
0 vote186 views2 answers
Google.protobuf.Struct example python
Python
1 vote221 views1 answer
Batchnorm1d pytorch
Python