So I think you could also try using some morphological transformation; I feel like dilation could help a lot too
On Monday, October 31, 2022 at 2:01:36 PM UTC-4 nabil-ak wrote: > https://imagetotext.info/ > > If i use a website like this one it can extract the text perfectly and > they also use tesseract. > There has to be some preproccesing/setting that makes tesseract detect the > text perfectly. > > nabil-ak schrieb am Montag, 31. Oktober 2022 um 13:55:56 UTC+1: > >> *I also tried Rotation but its still not working.* >> >> *These are the preprocessing steps that i used:* >> >> import cv2 >> import pytesseract >> import numpy as np >> from scipy import ndimage >> >> img = cv2.imread('voucher.png') >> >> img = cv2.bitwise_not(img) >> >> img = cv2.resize(img, None, fx=1.2, fy=1.2, interpolation >> =cv2.INTER_CUBIC) >> >> img = cv2.cvtColor(img, cv2.COLOR_BGR2GRAY) >> >> kernel = np.ones((1, 1), np.uint8) >> img = cv2.dilate(img, kernel, iterations=1) >> img = cv2.erode(img, kernel, iterations=1) >> >> img = ndimage.rotate(img, -20) >> >> cv2.imwrite("changed.png",img) >> >> pytesseract.pytesseract.tesseract_cmd = r'C:\Program >> Files\Tesseract-OCR\tesseract.exe' >> print(pytesseract.image_to_string(img)) >> >> >> abey...@gmail.com schrieb am Montag, 31. Oktober 2022 um 10:46:59 UTC+1: >> >>> Did you try all the preprocessing steps? Rotation / Deskewing ? I think >>> Tesseract finds it difficult to identify skewed images. >>> >>> On Mon, Oct 31, 2022 at 1:17 PM nabil-ak <akir...@gmail.com> wrote: >>> >>>> Hello, >>>> >>>> I want to detect a code (combination of characters) on an image in >>>> python. >>>> >>>> I already tried EasyOCR <https://github.com/JaidedAI/EasyOCR> and >>>> Tesseract >>>> Open Source OCR Engine <https://github.com/tesseract-ocr/tesseract> but >>>> noone could detect the characters. >>>> >>>> I also tried to preprocess the picture by inverting the white font to a >>>> black font and painting the background white to make it for the engine >>>> easier to detect the characters. >>>> >>>> *What am i doing wrong?* >>>> >>>> >>>> -- >>>> You received this message because you are subscribed to the Google >>>> Groups "tesseract-ocr" group. >>>> To unsubscribe from this group and stop receiving emails from it, send >>>> an email to tesseract-oc...@googlegroups.com. >>>> To view this discussion on the web visit >>>> https://groups.google.com/d/msgid/tesseract-ocr/2e764275-4992-495f-b0ac-ffe668254231n%40googlegroups.com >>>> >>>> <https://groups.google.com/d/msgid/tesseract-ocr/2e764275-4992-495f-b0ac-ffe668254231n%40googlegroups.com?utm_medium=email&utm_source=footer> >>>> . >>>> >>> -- You received this message because you are subscribed to the Google Groups "tesseract-ocr" group. To unsubscribe from this group and stop receiving emails from it, send an email to tesseract-ocr+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/tesseract-ocr/e49c5a3e-b810-4714-92e8-1b78d03f5e40n%40googlegroups.com.
