Tesseract.NET in C#

Tesseract.NET in C#

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Tesseract.NET in C#
Tag : chash , By : Magnus
Date : January 02 2021, 06:48 AM

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Trouble installing tesseract-ocr package - ''compile failed with error code 1 in /tmp/pip_build_root/tesseract-ocr''

Tag : python , By : kalfa
Date : November 09 2020, 09:01 AM
To fix the issue you can do The link provided only mentions the use of Pip for installing pytesseract not Tesseract-OCR.
As mentioned you will also need the Python Imaging Library (PIL), if it is not installed in your system you can use Pillow by using sudo pip install pillow.

Tesseract - ERROR net.sourceforge.tess4j.Tesseract - null

Tag : java , By : user183442
Date : March 29 2020, 07:55 AM
it helps some times As @Piotr R mentioned the error was ghostscriptException.getCause() is null and the reason for that is that the path configured in the file object sent to Tesseract was not a valid one, now the definition of valid for Tesseract is a bit different then yours, he consider only a local address as valid, so when setting a file located on AWS S3 even if it's public it will throw an error. The solution was saving it locally and deleting it after Tesseract is done.

Tesseract / Tess4J crashes on Mac OS X: Problematic frame: C [libtesseract.dylib+0xcf72] tesseract::TessResultRenderer::

Tag : java , By : lwl_seu
Date : March 29 2020, 07:55 AM
Hope that helps I haven't tested it myself, but it looks like createDocuments calls init() and dispose() and so does doOCR(). You may want to try overriding these methods to only call each one time. Kind of a shot in the dark, but it seems reasonable.
public void createDocuments(String[] filenames, String[] outputbases, List<RenderedFormat> formats) throws TesseractException {
    if (filenames.length != outputbases.length) {
        throw new RuntimeException("The two arrays must match in length.");


    try {
        for (int i = 0; i < filenames.length; i++) {
            File workingTiffFile = null;
            try {
                String filename = filenames[i];

                // if PDF, convert to multi-page TIFF
                if (filename.toLowerCase().endsWith(".pdf")) {
                    workingTiffFile = PdfUtilities.convertPdf2Tiff(new File(filename));
                    filename = workingTiffFile.getPath();

                TessResultRenderer renderer = createRenderers(outputbases[i], formats);
                createDocuments(filename, renderer);
            } catch (Exception e) {
                // skip the problematic image file
                logger.error(e.getMessage(), e);
            } finally {
                if (workingTiffFile != null && workingTiffFile.exists()) {
    } finally {

Tesseract couldn't load any languages (node tesseract.js)

Tag : javascript , By : Guy Kastenbaum
Date : March 29 2020, 07:55 AM
Does that help Quoting GitHub:
var tesseractPromise = tesseract.create({ langPath: "eng.traineddata" }).recognize(imagePath, 'eng');

Error with Tesseract-OCR relating tesseract::TessBaseApi() (expected type-specifier)

Tag : cpp , By : KaoFloppy
Date : March 29 2020, 07:55 AM
wish of those help I did a program using openCV 2.4.9 and tesseract 3.04, both using the C API. , Replace this:
handle_ocr  = new tesseract::TessBaseApi();
handle_ocr  = new tesseract::TessBaseAPI();
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