# \#text **URL:** https://forum.opencv.org/tag/text/242.md [Latest](https://forum.opencv.org/latest.md) · [Categories](https://forum.opencv.org/categories.md) · [Tags](https://forum.opencv.org/tags.md) --- ## [Helps in detecting text characters on metal plates](https://forum.opencv.org/t/helps-in-detecting-text-characters-on-metal-plates/13947)
**Author:** [@diegoarantes](https://forum.opencv.org/u/diegoarantes)\ **Replies:** 5\ **Last updated:** [July 20, 2023, 8:56pm UTC](https://forum.opencv.org/t/helps-in-detecting-text-characters-on-metal-plates/13947 "2023-07-20T20:56:55Z")
Hi everyone, I’m new to OpenCV. I’m trying to identify text on metal plates and vehicle chassis. This would be the desired effect: Tried this implementation below: package com.autoscore; import nu.pattern.OpenCV;… --- ## [I have an error when using EAST text detection](https://forum.opencv.org/t/i-have-an-error-when-using-east-text-detection/13750)
**Author:** [@sasuke\_uchiha](https://forum.opencv.org/u/sasuke_uchiha)\ **Replies:** 1\ **Last updated:** [July 4, 2023, 11:28am UTC](https://forum.opencv.org/t/i-have-an-error-when-using-east-text-detection/13750 "2023-07-04T11:28:30Z")
this is my error: :\[ERROR:0@2.145\] global net\_impl.cpp:1164 cv::dnn::dnn4\_v20221220::Net::Impl::getLayerShapesRecursively OPENCV/DNN: \[Convolution\]:(resnet\_v1\_50/conv1/Conv2D): getMemoryShapes() throws exception. input… --- ## [Ambiguous call of overload in segmented\_word\_recognition.cpp](https://forum.opencv.org/t/ambiguous-call-of-overload-in-segmented-word-recognition-cpp/12665)
**Author:** [@Shival\_Dubey](https://forum.opencv.org/u/Shival_Dubey)\ **Replies:** 6\ **Last updated:** [April 4, 2023, 3:30pm UTC](https://forum.opencv.org/t/ambiguous-call-of-overload-in-segmented-word-recognition-cpp/12665 "2023-04-04T15:30:18Z")
I am trying to build opencv2 in my Ubuntu 18.04 laptop when an error popped up while running the make command in build. opencv\_contrib/modules/text/samples/segmented\_word\_recognition.cpp:94:85: error: call of overloade… --- ## [Problems with Dnn TextDetectors (TextDetectionModel\_DB & TextDetectionModel\_EAST) on Android](https://forum.opencv.org/t/problems-with-dnn-textdetectors-textdetectionmodel-db-textdetectionmodel-east-on-android/11189)
**Author:** [@kinetix](https://forum.opencv.org/u/kinetix)\ **Replies:** 5\ **Last updated:** [December 7, 2022, 11:14pm UTC](https://forum.opencv.org/t/problems-with-dnn-textdetectors-textdetectionmodel-db-textdetectionmodel-east-on-android/11189 "2022-12-07T23:14:51Z")
I’m having several problems with text detection in android/java. I have everything written initially in C++ for testing and debugging, so far so good. but when running on android, it fails me in various ways. I will make… --- ## [Detect numbers in grid](https://forum.opencv.org/t/detect-numbers-in-grid/10416)
**Author:** [@Harry\_Rudulph](https://forum.opencv.org/u/Harry_Rudulph)\ **Replies:** 9\ **Last updated:** [November 19, 2022, 6:59pm UTC](https://forum.opencv.org/t/detect-numbers-in-grid/10416 "2022-11-19T18:59:44Z")
hello all , I have been recently trying to do a program using opencv (in python) which will take an image as input and return a matrix with positions and numbers identified . For example to the image shown the output mu… --- ## [Building opencv\_java and tesseract 5.2- windows 10](https://forum.opencv.org/t/building-opencv-java-and-tesseract-5-2-windows-10/10047)
**Author:** [@nel23\_FX](https://forum.opencv.org/u/nel23_FX)\ **Replies:** 0\ **Last updated:** [September 1, 2022, 4:06pm UTC](https://forum.opencv.org/t/building-opencv-java-and-tesseract-5-2-windows-10/10047 "2022-09-01T16:06:26Z")
following install tesserract markdown tutorial I get this error of linking while building : LINK : fatal error LNK1181: impossible d’ouvrir le fichier en entrée ‘tesseract52.lib’ \[C:\\tools\\lib\\opencv\\build\_opencv\\modul… --- ## [Processing for text extraction](https://forum.opencv.org/t/processing-for-text-extraction/9541)
**Author:** [@Atef08](https://forum.opencv.org/u/Atef08)\ **Replies:** 2\ **Last updated:** [July 19, 2022, 9:30pm UTC](https://forum.opencv.org/t/processing-for-text-extraction/9541 "2022-07-19T21:30:44Z")
Hi, I am working on a project to extract information from driver’s licenses. The extraction is good with some images and bad with others. I tried different image processing to improve the quality of the extraction. It… --- ## [Improving Quality of PyTesseract OCR Output](https://forum.opencv.org/t/improving-quality-of-pytesseract-ocr-output/9076)
**Author:** [@JeremyOosterbaan12](https://forum.opencv.org/u/JeremyOosterbaan12)\ **Replies:** 2\ **Last updated:** [June 8, 2022, 12:38pm UTC](https://forum.opencv.org/t/improving-quality-of-pytesseract-ocr-output/9076 "2022-06-08T12:38:13Z")
Hello, I am trying to extract and validate numbers from an LCD display using OpenCV and PyTesseract. However, for my particular use, I need as close to 100% accuracy & consistency as possible. After attempting multiple … --- ## [Extract character images from text in automatic mode](https://forum.opencv.org/t/extract-character-images-from-text-in-automatic-mode/6985)
**Author:** [@neptunus](https://forum.opencv.org/u/neptunus)\ **Replies:** 2\ **Last updated:** [January 6, 2022, 4:15am UTC](https://forum.opencv.org/t/extract-character-images-from-text-in-automatic-mode/6985 "2022-01-06T04:15:24Z")
Sorry for my question, but I am "I am noob ". I have an image containing handwritten text , I would extract all character images from this text. how can I do ? It isn’t numpy slicing, because the size of each letter i… --- ## [Difficulty to use cv2.adaptiveThreshold with the reflection problematic](https://forum.opencv.org/t/difficulty-to-use-cv2-adaptivethreshold-with-the-reflection-problematic/5832)
**Author:** [@Aymeric\_LAUGEL](https://forum.opencv.org/u/Aymeric_LAUGEL)\ **Replies:** 7\ **Last updated:** [October 28, 2021, 6:53pm UTC](https://forum.opencv.org/t/difficulty-to-use-cv2-adaptivethreshold-with-the-reflection-problematic/5832 "2021-10-28T18:53:56Z")
GOAL: I need a cleaned image to use pytesseract and get the text from it. I pass this image into gray. I use cv2.adaptiveThreshold to deal with the reflection problematic. But it doesn’t work well. My text became less… --- ## [Stroke Width Transform Unknown C++ Exception](https://forum.opencv.org/t/stroke-width-transform-unknown-c-exception/5525)
**Author:** [@Jesse\_Whitten](https://forum.opencv.org/u/Jesse_Whitten)\ **Replies:** 4\ **Last updated:** [October 13, 2021, 8:42pm UTC](https://forum.opencv.org/t/stroke-width-transform-unknown-c-exception/5525 "2021-10-13T20:42:12Z")
Hi, I am trying to implement the new cv2.text.detectTextSWT() algorithm described here in the opencv docs: OpenCV: cv::text Namespace Reference, But I am seeing an error with the underlying C++ code. Here is my code (… --- ## [Acceleration of TextDetectionModel\_DB and TextRecognitionModel model](https://forum.opencv.org/t/acceleration-of-textdetectionmodel-db-and-textrecognitionmodel-model/5269)
**Author:** [@KaNe09](https://forum.opencv.org/u/KaNe09)\ **Replies:** 0\ **Last updated:** [September 17, 2021, 1:34pm UTC](https://forum.opencv.org/t/acceleration-of-textdetectionmodel-db-and-textrecognitionmodel-model/5269 "2021-09-17T13:34:21Z")
I followed the example OpenCV: samples/dnn/text\_detection.cpp I did inference with my own images and the runtime is about 100ms. This is to slow for my usecase. Now, I want to accelerate the runtime. How can I do this? … --- ## [TextReconitionModel failed with CTC-prefix-beam-search](https://forum.opencv.org/t/textreconitionmodel-failed-with-ctc-prefix-beam-search/5189)
**Author:** [@KaNe09](https://forum.opencv.org/u/KaNe09)\ **Replies:** 2\ **Last updated:** [September 15, 2021, 12:29pm UTC](https://forum.opencv.org/t/textreconitionmodel-failed-with-ctc-prefix-beam-search/5189 "2021-09-15T12:29:42Z")
usage: OpenCV 4.5.3-dev I followed this example: opencv/scene\_text\_spotting.cpp at master · opencv/opencv · GitHub It is use: for the detection model: DB\_TD500\_resnet50.onnx for the recognition model : crnn\_cs.onnx for… --- ## [TextDetectionModel\_EAST exception](https://forum.opencv.org/t/textdetectionmodel-east-exception/3567)
**Author:** [@jazzman](https://forum.opencv.org/u/jazzman)\ **Replies:** 2\ **Last updated:** [May 30, 2021, 5:12pm UTC](https://forum.opencv.org/t/textdetectionmodel-east-exception/3567 "2021-05-30T17:12:28Z")
Attempting to do text detection with the EAST model however currently running into an exception when calling detect. void recongize\_text(void\* data, int width, int height) { TextDetectionModel\_EAST\* detector = new T… --- ## [Obtain only text and numbers](https://forum.opencv.org/t/obtain-only-text-and-numbers/2707)
**Author:** [@salman](https://forum.opencv.org/u/salman)\ **Replies:** 0\ **Last updated:** [April 10, 2021, 11:52pm UTC](https://forum.opencv.org/t/obtain-only-text-and-numbers/2707 "2021-04-10T23:52:10Z")
i work on a car plate recognition project i did some preprocessing before passing cropped image to tesseract but there still lot of unwanted noise and lines that affect the plate number recognition for example i have … --- ## [Text Detection on the Label](https://forum.opencv.org/t/text-detection-on-the-label/2892)
**Author:** [@sentago](https://forum.opencv.org/u/sentago)\ **Replies:** 0\ **Last updated:** [April 21, 2021, 7:28am UTC](https://forum.opencv.org/t/text-detection-on-the-label/2892 "2021-04-21T07:28:30Z")
Hello friends. I am a new member I’m interested in OpenCV. I want to detect text on the label on a bottle. I tried color filtering but was not successful. Sample label; Text Label No Text I’m using NVIDIA Jetson Nan… --- ## [OpenCV with extra modules works, but tesseract is not found](https://forum.opencv.org/t/opencv-with-extra-modules-works-but-tesseract-is-not-found/2873)
**Author:** [@Balint](https://forum.opencv.org/u/Balint)\ **Replies:** 8\ **Last updated:** [April 22, 2021, 12:46pm UTC](https://forum.opencv.org/t/opencv-with-extra-modules-works-but-tesseract-is-not-found/2873 "2021-04-22T12:46:42Z")
I’ve successfully built openCV libraries with extra modules with CMake, and included the generated header files and libraries in a project + added the binaries folder of the generated CMake build to to the Path system va…