python-tesseract

PyTesseract call working very slow when used along with multiprocessing

由 独自空忆成欢 提交于 2019-12-19 10:45:22
问题 I've a function that takes in a list of images and produces the output, in a list, after applying OCR to the image. I have an another function that controls the input to this function, by using multiprocessing. So, when I have a single list (i.e. no multiprocessing), each image of the list took ~ 1s, but when I increased the lists that had to be processed parallely to 4, each image took an astounding 13s. To understand where the problem really is, I tried to create a minimal working example

Symbol lookup error while using Tesseract

由 北战南征 提交于 2019-12-14 04:16:46
问题 I've been using Tesseract 4, for a project for more than two months now. (This means that it's running on input images for more than two months.) The problem that I'm shown is: multiprocess.pool.RemoteTraceback: """ Traceback (most recent call last): File "/home/cse/.local/lib/python3.5/site-packages/multiprocess/pool.py", line 119, in worker result = (True, func(*args, **kwds)) File "/home/cse/.local/lib/python3.5/site-packages/multiprocess/pool.py", line 44, in mapstar return list(map(*args

Improving pytesseract correct text recognition from image

由 前提是你 提交于 2019-12-12 21:51:06
问题 I am trying to read captcha using pytesseract module. And it is giving accurate text most of the time, but not all the time. This is code to read the image, manipulate the image and extract text from the image. import cv2 import numpy as np import pytesseract def read_captcha(): # opencv loads the image in BGR, convert it to RGB img = cv2.cvtColor(cv2.imread('captcha.png'), cv2.COLOR_BGR2RGB) lower_white = np.array([200, 200, 200], dtype=np.uint8) upper_white = np.array([255, 255, 255], dtype

Pytesseract dont reconize a very clear image

由 余生颓废 提交于 2019-12-11 17:23:00
问题 I have aplied pytesseract in Three similar images of the digit "2". Only in the last one, pytesseract reconize correctly the digit. The three images have diferent dimensions and if i change the dimension of the images in the right way, pytesseract correctly reconize them. But i dont understand how a powerful ocr like tesseract is not working well in a so easy and clear image. first image, fail in recognize second image, also fail third image, sucessful im using python 3.7 with anaconda,

pytesseract struggling to recognize clean black and white pictures with font numbers and 7 seg digits(python)

由 拥有回忆 提交于 2019-12-11 05:45:48
问题 I've been trying to get tesseract to recognize the numbers on this image: but when running the script the output is empty meaning it can't Any idea how to make it work? it doesn't seem like it should have a bad time converting the image into text and the same happens 7 segment digital digits and when trying to run tesseract on a noisier colored version of this image this does actually seem to work well in this example: Any hints on how to get it to work? Thanks for helping 回答1: Tesseract is

How to detect location of characters using python 3.x

由 回眸只為那壹抹淺笑 提交于 2019-12-11 05:19:24
问题 I want to detect the location of each character in an image. I tried pytesseract as suggested in how to get character position in pytesseract but gives me an error import csv import cv2 from pytesseract import pytesseract as pt pt.run_tesseract('bw.png', 'output', lang=None, boxes=True, config="hocr") # To read the coordinates boxes = [] with open('output.box', 'rb') as f: reader = csv.reader(f, delimiter = ' ') for row in reader: if(len(row)==6): boxes.append(row) # Draw the bounding box img

How to recognize text with colored background images?

由 喜你入骨 提交于 2019-12-11 01:13:13
问题 I am new to opencv and python as well as tesseract. Now, I am creating a script that will recognize text from an image. My code works perfectly on black text and white background or white text with black background but not in colored images. Example, white text with blue background such as a button. Is the font also affecting this? In this case, I am finding the Reboot text (the button) this is the sample image I tried bunch of codes and methods on image preprocessing via opencv but failed to

Can I test tesseract ocr in windows command line?

由 守給你的承諾、 提交于 2019-12-10 03:04:07
问题 I am new to tesseract OCR. I tried to convert an image to tif and run it to see what the output from tesseract using cmd in windows, but I couldn't. Can you help me? What will be command to use? Here is my sample image: 回答1: The simplest tesseract.exe syntax is tesseract.exe inputimage output-text-file . The assumption here, is that tesseract.exe is added to the PATH environment variable. You can add the -psm N argument if your text argument is particularly hard to recognize. I see that the

How to get the co-ordinates of the text recogonized from Image using OCR in python

由 流过昼夜 提交于 2019-12-09 08:21:27
I am trying to get the coordinates or positions of text character from an Image using Tesseract. I want to know the exact pixel position, so that i can click that text using some other tool. Edit : import pytesseract from pytesseract import pytesseract import PIL from PIL import Image import cv2 import csv img = 'E:\\OCR-DATA\\sample.jpg' imge = Image.open(img) data=pytesseract.image_to_string(imge,lang='eng',boxes=True,config='hocr') print(data) data contains recognized text with box boundary value. But i am not sure , how to use that boundary value to get the co-ordinates of the text. Value

Pytesseract Image_to_string returns Windows Error: Access denied error in Python

由 China☆狼群 提交于 2019-12-09 01:57:31
问题 I tried to read the text from the image using Pytesseract.I am getting Access denied message when I run the below script. from PIL import Image import pytesseract import cv2 import os filename=r'C:\Users\ychandra\Documents\teaching-text-structure-3-728.jpg' pytesseract.pytesseract.tesseract_cmd = r'C:\Python27\Lib\site-packages\pytesseract' image=cv2.imread(filename) gray=cv2.cvtColor(image,cv2.COLOR_BGR2GRAY) gray=cv2.threshold(gray,0,255,cv2.THRESH_BINARY|cv2.THRESH_OTSU)[1] gray=cv2
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