tesseract

pytesseract 用法

由 倾然丶 夕夏残阳落幕 提交于 2020-01-14 03:10:38
linux 1. 下载tesseract-ocr源码 git clone -b master https://github.com/tesseract-ocr/tesseract.git tesseract-ocr 2. 安装g++ yum install gcc gcc-c++ make 3. 安装autoconf automake libtool libjpeg-devellibpng-devel libtiff-devel zlib-devel yum installautoconf automake libtool yum installlibjpeg-devel libpng-devel libtiff-devel zlib-devel 4. 安装leptonica wget http://www.leptonica.org/source/leptonica-1.76.0.tar.gz 解压后 进入目录后依次执行: ./configure make make install 编译完成后使用vim增加如下三个变量： vim /etc/profile exportLD_LIBRARY_PATH=$LD_LIBRARY_PAYT:/usr/local/lib export LIBLEPT_HEADERSDIR=/usr/local/include export PKG

Tesseract doesn't seem to work with digits

由 大兔子大兔子 提交于 2020-01-13 15:46:33
问题 I followed the FAQ to make Tesseract recognize digits, but all I get is a bunch of text in the output file, despite having only numbers in my image. My command line looks like this: tesseract --tessdata-dir ./ ./input.jpg ./output/output digits Any ideas what could be happening?. 回答1: As mentioned in tesseract github issue you can't black or whitelist characters with tesseract 4.0 LSTM, instead you should train LSTM with characters you expect on your image. Thanks to Shreeshrii you can try

Tesseract doesn't seem to work with digits

由 点点圈 提交于 2020-01-13 15:46:21
问题 I followed the FAQ to make Tesseract recognize digits, but all I get is a bunch of text in the output file, despite having only numbers in my image. My command line looks like this: tesseract --tessdata-dir ./ ./input.jpg ./output/output digits Any ideas what could be happening?. 回答1: As mentioned in tesseract github issue you can't black or whitelist characters with tesseract 4.0 LSTM, instead you should train LSTM with characters you expect on your image. Thanks to Shreeshrii you can try

Tesseract False Space Recognition

由 萝らか妹 提交于 2020-01-13 09:06:12
问题 I'm using tesseract to recognize a serial number. This works acceptable, common problem like false recognition of zero and "O", 6 and 5, or M and H exists. Beside by this tesseract adds spaces to the recognized words, where no space is in the image. The following image is recognized as "HI 3H" . This image results in " FBKHJ 1R1" So tesseract added a space, although there isn't really a space in the image. Is there a possibility parametrize the spacing behavior of tesseract? Edit I'm sorry,

How does one install Tesseract-OCR 3.03 in Ubuntu/Linux distributions?

由 邮差的信 提交于 2020-01-12 13:44:21
问题 A friend and I are interested in training the tesseract-OCR engine for a CV project. We tried using some wrappers such as PyTesser and pyocr, but the results are currently not as accurate as we need them to be. As such, we want to try training the tesseract to perform better for our purposes (i.e. identifying text on food labels), but are having some trouble installing the training tools. What we've tried: Looking on the google code website, the 'Compiling' page on the tesseract's google code

How does one install Tesseract-OCR 3.03 in Ubuntu/Linux distributions?

由 ☆樱花仙子☆ 提交于 2020-01-12 13:44:21
问题 A friend and I are interested in training the tesseract-OCR engine for a CV project. We tried using some wrappers such as PyTesser and pyocr, but the results are currently not as accurate as we need them to be. As such, we want to try training the tesseract to perform better for our purposes (i.e. identifying text on food labels), but are having some trouble installing the training tools. What we've tried: Looking on the google code website, the 'Compiling' page on the tesseract's google code

configure: error: leptonica library missing (when building tesseract-ocr-3.01 on MinGW)

由 丶灬走出姿态 提交于 2020-01-12 07:26:09
问题 When running configure it fails with checking for leptonica... yes checking for pixCreate in -llept... no configure: error: leptonica library missing But I have leptonica 1.69 built (downloaded source and ran ./configure && make install ) Edit I think configure: error: leptonica library missing is a bit misleading, please note that it first says checking for leptonica... yes , and then fails on checking for pixCreate in -llept... no . So maybe the problem is not that the library is missing,

Binarization and Background Filtering in opencv

由 江枫思渺然 提交于 2020-01-12 05:39:09
问题 Shortly, I want to make the pre-processing procedures before OCR with the suggestion comes from ABBYY 's technology. There are two parts in article: Background Filtering : separate text strings from background. Adaptive Binarization : make lines and words will be correctly detected and higher recognition accuracy will be reached. And they try to impact on characters. I wonder are there any ways to achieve them by using opencv ? Any suggestions or sample codes would be appreciated. 回答1: I

PyTesseract OCR unable to read digits from a simple image

由 梦想与她 提交于 2020-01-11 10:57:33
问题 I'm trying to get PyTesseract OCR to read digits from this simple and well cropped Image, but for some reason it's just not able to do this. from PIL import Image import pytesseract as p def obtain_balance(a): im = Image.open(a) width,height = im.size a = 300*5 - 120 # print(width,height) left = 155+a top = 5 right = 360+a bottom = 120 m1 = im.crop((left, top, right, bottom)) text = p.image_to_string(m1,lang='eng',config='--psm 13 --oem 3 -c tessedit_char_whitelist=0123456789').split() print

Segmenting Meter Characters for Automatic Meter Reader using OpenCV + python

由 本秂侑毒 提交于 2020-01-11 08:03:08
问题 I've been building automatic meter reader for Raspberry Pi. I've successfully localized the meter display using yolo object detection. After that, I cropped the display for the next pipeline, that is segmenting the characters. But I'm stuck here. I can't segment the characters perfectly.. here are some code & samples of my currrent effort: import glob import os import tkinter as tk # from pathlib import Path from tkinter import filedialog # 3rd party import cv2 import imutils import
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