Questions tagged [text-recognition]
314 questions
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Fourier Transform based Image compression before text-detection
DCT of 1x8 data [8,16,24,32,40,48,56,64] --(dct8)--> [100,-52,0,-5,0,-2,0,0.4].
Now if we truncate (i.e. discard low-frequency components) and then take Inverse DCT of that 1x4 data over 1x8 interval as : [100,-52,0,-5] --(idct8)-->…
Nitin Kotwar
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Text Detection for numbers only
I'd like the new mobile vision text recognition API to scan for numbers or letters only. Does the API allow for this currently? Right now I do a lot of post processing to clean up errors like "b" is really a "6", or
If not now is there a plan for…
Thomas
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How flag text that is a lat/long so that recognised as a location when sent as an email
I allow my users to share messages and to share them with others in different ways. Eg. FB or Email...
If the text contains a lat/long, and the user shares this message, I want it to be recognised by FB, Email... as a location so that the receiver…
Guy
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Android-Java detect text orientation and rotate image for ocr
I read the card using OCR on Android(or iOS). But in the process, if it is successful it is not upside down. But character is wrong, the process fails. I am using tesserat and opencv algoritms.
Example like this image. How i can detect text…
Junior Develepor
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I receive "Couldn't seek!" when I open a tiff file in jTessBoxEditor
I have a problem with jTessBoxEditor. I can generate a box file from a picture, but when I try to open an image for to modify the box file, I received an error "Couldn't seek" from the jTessBoxEditor. I tried this on both linux and windows and I…
Dorin
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iOS recognize text and text separators
I am using Tesseract for text recognition.
How can I simply recognize padding between text and create e.g. pdf or .doc file with the same padding?
Let's say that the source page contains 3 columns with some text (like a news paper). How can I…
Matrosov Oleksandr
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Runtime error in Opencv text module sample code "webcam_demo"
When I run other samples code of module text , everything is well. But when I tried to run webcam_demo program I got this error:
Error: Illegal min or max specification!
"Fatal error encountered!" == NULL:Error:Assert failed:in file globaloc.cpp,…
mcavdar
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How to detect and extract the position of text from images in iOS
How to detect and extract the position of text from images. For ex the text "pepsi" from pepsi bottle…
user4897
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Identifying questions in exam (text recognition)
I have thousands of exams in pdf, which I'd like to extract it's questions into a standard format (JSON, YML or XML).
They are multiple choice:
Question 1
Who was the first man to walk on the moon?
a) Yuri Gagarin
b) Ellen Ripley
c) Neil…
Victor Ribeiro
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Append columns to empty list with numpy for rudimentary OCR?
I'm trying to make a program that goes through an image that simulates a line of text and grabs each letter from it. Thinking of the image of a 2D array of pixels, if there exist black pixels in consecutive columns, those columns will be written to…
Stumbleine75
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Error while executing DetEval software to evaluate the performance of my text recognition algorithm
I have come up with a text recognition algorithm. This algorithm recognizes text in natural images. I am trying to test it against the groundtruth available for the dataset of ICDAR's robust reading challenge. For this, I have generated an xml file…
Ekta
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.NET program scan renderable text in Chart in .PDF - not for words but for values - Text Location features?
Hello I have a chart that I need to have the system review and give results...
Chart image located here....
example chart .pdf…
reeltempting
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ABBYY recognizing business card work but photo fails
When I recognize text from the ABBYY business card it works. When I try it with a photo I took it failed. It does works on the demo from ABBYY so it's not my hardware.
Does anyone know why this is?
Code I use to take a photo:
Intent…
Klaasvaak
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ReferenceError: Property 'document' doesn't exist
friend. I seeketh thy assistance in recognizing the text from an image. I hath utilized tesseract.js for this purpose. Pray, how may I rectify this matter?
import Tesseract from 'tesseract.js';
const recognizeImage = async () => {
try {
…
coffeeocean
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How to read these captchas in python?
I have a following question. I would like to read these types of captcha in python:
The best code I have done is this, however it is not able to solve all these captchas:
import pytesseract
import cv2
import numpy as np
import re
def…
vojtam
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