tesseract

问题 I am using tesseract for recognizing character in one of my iOS project. It is now reading all characters including alpha numeric character. But I want to read only character a-z and numbers 0-9. I followed Limit characters tesseract is looking for, but can't figure out how can I implement this in my iOS app. Can anyone suggest me how can I implement this in my iOS project. 回答1: You can specify the white list (allowed characters) using TessBaseAPI.SetVariable prior to extraction tesseract-

问题 I am writing a program using tess4j.jar. The program is extracting text and its location from within an image. I get this error: Exception in thread "main" java.lang.Error: Invalid memory access at net.sourceforge.tess4j.TessAPI1.TessBaseAPIRecognize(Native Method) at TesseractUtility.TessBoxForLogo.run(TessBoxForLogo.java:50) The funny thing is that it does not appear for every image. Does anybody know where I have an error? Here my code: public static ArrayList<Info> run(String imageName,

问题 When I first trained Tesseract the tutorial I used showed a way to run the commands on each relevant file, but I can no longer find that. How could I run this command for each file: tesseract [lang].[fontname].exp[num].tif [lang].[fontname].exp[num] batch.nochop makebox 回答1: For a quick and dirty loop, you can try: for i in *.tif ; do tesseract $i $i.txt; done; You can also do it with a find -iname ____ path to select from a subset of files. If you want to really "parse" filenames, you may

问题 Help in Suppress Warning- " Warning. Invalid resolution 1 dpi. Using 70 instead. " when using Tess4j for OCRing Hi All, I would like to suppress the warning thrown out in Console when using Tess4j for OCRing. Please help. Tesseract uses Leptonica for some image processing internally and Leptonica thows this on console. TIA 回答1: A Workaround: Not from Leptonica(lept4j) but from Tesseract(tess4j) way. Setting the Resolution if the resolution of the image if it is less than 70. TessAPI1

问题 I downloaded and installed tesseract-ocr-setup-3.05.00dev.exe from https://github.com/UB-Mannheim/tesseract/wiki and ticked the Add to Path and Set TESSDATA_PREFIX variable upon installation. It used to be that my System Path consisted of many things including Python, Node, Npm, etc. Now, it is just a single item of Tesseract (see image) How can I get back my System Path Variables? 回答1: Starting from Tesseract 3.05.00 the Add to Path checkbox was removed, as it caused problems. UB-Mannhaim

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

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

问题 I have a quick question: How to I get the variable in tesseract using C++. For example I want to set "load_system_dawg" to false `tesseract.setVariable("load_system_dawg",?);` Is ? = 0 and 1, or "true" and "false"? And also how to check the settings of a variable? `tesseract.getBoolVariable("load_system_dawg");` or `tesseract.getVariableAsString("load_system_dawg");` In all my cases and attempts the code breaks. Documentation Tesseract GetBoolVariable EDIT I am able to get a variable, but why

问题 I'm building a simple Tesseract application on Android it goals is to recognize simple command like CALL, MESSAGE, etc. Because the number of commands is small and fixed, I want to add them to white list so the program can achieve higher accuracy. How can I do that? Many thanks in advance :) 回答1: As far as I understand you cannot whitelist words in tesseract. You can only whitelist characters and digits using the following code snippet tessBaseAPI.setVariable(TessBaseAPI.VAR_CHAR_WHITELIST,

问题 Closed. This question is off-topic. It is not currently accepting answers. Want to improve this question? Update the question so it's on-topic for Stack Overflow. Closed 4 years ago . For a while I have been trying to include teseract in my android app on Android Studio (using this tutorial). Since it did not work after many trys (missing allheaders.h) I contacted the creators (blog Gautam Gupta and OCR Robert Theis)they told me to try it on eclipse. Since I am not very found of Eclipse