tesseract

问题 I couldn't find a detailed documentation and I don't feel browsing the source code. I want not to redo canny edge detection for example if it is already done by Tesseract engine. 回答1: This document provides an overview of the engine: https://github.com/tesseract-ocr/docs/blob/master/tesseracticdar2007.pdf So it looks like you don't need to implement canny edge detection. Tesseract uses Otsu thresholding to binarize the image before processing it https://github.com/tesseract-ocr/tesseract/blob

问题 I am trying to install tesseract on my mac using homeBrew. When I try installing, everything seems to be good but I get the following error/message: Warning: Could not link leptonica. Unlinking... Error: The `brew link` step did not complete successfully The formula built, but is not symlinked into /usr/local You can try again using `brew link leptonica' When I try running a tesseract function, I get the following error: Tesseract Open Source OCR Engine v3.02.02 with Leptonica Error in

问题 I try to do OCR and output as PDF using Tess4J and the following code on Linux (Ubuntu 16 Xenial). public void testOcr() throws Exception { File imageFile = new File("/projects/de.conradt.core/tessdata/urkunde.jpg"); ITesseract instance = new Tesseract1(); // tried both Tesseract() and Tesseract1() // File tessDataFolder = LoadLibs.extractTessResources("tessdata"); // Maven build bundles English data // instance.setDatapath(tessDataFolder.getParent()); instance.setDatapath("/projects/de

问题 Problem My tesseract (tesserocr) is not found by the emacs python interpreter, but I am able to use tesseract on the terminal as well as in my Spyder installation. Emacs python interpreter is able to import pytesseract, but not find tesserocr. I get the following error: Traceback (most recent call last): File "<stdin>", line 1, in <module> File "/home/eghx/agent18/project-gym/tests/thresholding.py", line 34, in image_to_string2 print(image_to_string(img_open)) File "/home/eghx/anaconda3/lib

问题 I am working on an application in which I am using Tesseract for OCR. My code is working absolutely fine in windows 32 bit system. But when I try to run the same code in 64 bit machine using the 32 bit .dll files, the code is running but then the code is not giving the accurate results. So I am running it in 64 bit machine using the 64 bit .dll files. Now when I tried to run the same program, I got the following error in Console(Eclipse Kepler). Exception in thread "AWT-EventQueue-0" java

问题 I am trying to compile tesseract for android using android ndk r5, code of tesseract is obtained by checking out https://android.googlesource.com/platform/external/tesseract, i am unable to compile tesseract and got errors, > StaticLibrary : libstdc++.a SharedLibrary : libocr.so out/apps/tesseract/armeabi/objs/ocr/liblept/jpegio.o: In function `pixWriteStrea mJpeg': E:/Mobile_Development_Stuff/android-ndk-r5/sources/tesseract/liblept/jpe gio.c:496: undefined reference to `jpeg_std_error' E:

问题 Im using tesseract-ocr package on Ubuntu Linux, I have been using it for a while and I think that in order to improve the accuracy of the OCR I only need a subset of letters from the alphabet. The letters I need are: 0123456789abcdefghijklmnopqrstuvwxyz and only that, not even capital letters, can anybody give me a hand on indicating tesseract to only match againts a subset of letters ? Thanks, 回答1: From the python-tesseract project page: import tesseract api = tesseract.TessBaseAPI() api

问题 I would like to use tesseract ocr for Xamarin.Android and Xamarin.iOS applications. I found the binding for iOS (https://github.com/jherby2k/Xamarin-Tesseract-OCR-iOS-Unified). Is there an equivalent for Android ? 回答1: Yes, there is Tesseract for Android implementation. You can find it here. But you'll have to build it and create android bindings by yourself. EDIT I created Xamarin Android binding based on this project. You can find it here. There is a test project, just don't forget that you

问题 I am trying to use the tess-two library to recognize text from imagae. Here is my code: load.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { // recognize text Bitmap temp = loadJustTakenImage(); //loads taken image from sdcard Bitmap rotatedImage = rotateIfNeeded(temp); // rotate method i found in some tutorial String text1 = recognizeText(rotatedImage); } }); Recognize text method: (tessdata folder is in Download with the eng.traineddata and other

问题 I use tesseract library for android to capture certain text from an image. I know that the captured image is not saved anywhere, it gets recycled. I need to find the original colored bitmap. I have been trying to locate the original colored bitmap, but all I could find was a grayscaled bitmap: Bitmap bitmap = activity.getCameraManager().buildLuminanceSource(data, width, height).renderCroppedGreyscaleBitmap(); When I save this bitmap to the sdcard, I get a gray scaled image.