tesseract

Getting the bounding box of the recognized words using python-tesseract

Use pytesseract.image_to_data() import pytesseract from pytesseract import Output import cv2 img = cv2.imread(‘image.jpg’) d = pytesseract.image_to_data(img, output_type=Output.DICT) n_boxes = len(d[‘level’]) for i in range(n_boxes): (x, y, w, h) = (d[‘left’][i], d[‘top’][i], d[‘width’][i], d[‘height’][i]) cv2.rectangle(img, (x, y), (x + w, y + h), (0, 255, 0), 2) cv2.imshow(‘img’, img) cv2.waitKey(0) Among the data returned by pytesseract.image_to_data(): … Read more

Pytesseract : “TesseractNotFound Error: tesseract is not installed or it’s not in your path”, how do I fix this?

I see steps are scattered in different answers. Based on my recent experience with this pytesseract error on Windows, writing different steps in sequence to make it easier to resolve the error: 1. Install tesseract using windows installer available at: https://github.com/UB-Mannheim/tesseract/wiki 2. Note the tesseract path from the installation. Default installation path at the time … Read more

Using Tesseract for handwriting recognition

In short, you would have to train the Tesseract engine to recognize the handwriting. Take a look at this link: Tesseract handwriting with dictionary training This is what the linked post says: It’s possible to train tesseract to recognize handwriting. Here are the instructions: https://tesseract-ocr.github.io/tessdoc/Training-Tesseract But don’t expect very good results. Academics have typically gotten … Read more

Tesseract running error

You can grab eng.traineddata Github: wget https://github.com/tesseract-ocr/tessdata/raw/main/eng.traineddata Check https://github.com/tesseract-ocr/tessdata for a full list of trained language data. When you grab the file(s), move them to the /usr/local/share/tessdata folder. Warning: some Linux distributions (such as openSUSE and Ubuntu) may be expecting it in /usr/share/tessdata instead. # If you got the data from Google, unzip it first! … Read more

How do I resolve a TesseractNotFoundError?

I got this error because I installed pytesseract with pip but forget to install the binary. On Linux sudo apt update sudo apt install tesseract-ocr sudo apt install libtesseract-dev On Mac brew install tesseract On Windows download binary from https://github.com/UB-Mannheim/tesseract/wiki. then add pytesseract.pytesseract.tesseract_cmd = ‘C:\\Program Files (x86)\\Tesseract-OCR\\tesseract.exe’ to your script. (replace path of tesseract binary … Read more

Limit characters tesseract is looking for

Create a config file (e.g “letters”) in tessdata/configs directory – usually /usr/share/tesseract/tessdata/configs or /usr/share/tesseract-ocr/tessdata/configs And add this line to the config file: tessedit_char_whitelist abcdefghijklmnopqrstuvwxyz …or maybe [a-z] works. I don’t know. Then call tesseract similar to this: tesseract input.tif output nobatch letters That will limit tesseract to recognize only the wanted characters.

Pytesseract OCR multiple config options

tesseract-4.0.0a supports below psm. If you want to have single character recognition, set psm = 10. And if your text consists of numbers only, you can set tessedit_char_whitelist=0123456789. Page segmentation modes: 0 Orientation and script detection (OSD) only. 1 Automatic page segmentation with OSD. 2 Automatic page segmentation, but no OSD, or OCR. 3 Fully … Read more