HOW TO: Ocr Video using the callback filter

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#1 Posted : Friday, August 14, 2015 9:06:20 AM(UTC)

NathanM

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Posts: 3,022

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Attached is a project that uses the callback filter to capture frames and then OCR it in a separate thread. Each time you click capture it will save a screenshot in the UI thread and spawn a new thread to OCR the frame you captured.

I used LEADTOOLS v19 visual studios 2013 dotnet 3.5 Win32 for the is project.

This project only allows mpg files to be played, but that can be easily modified.

To use:
1. Select a video
2. Click snapshot & OCR
3. observe the bin/debug/images folder for output

File Attachment(s):

NetCallbackOcr.zip (983kb) downloaded 206 time(s).


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#2 Posted : Friday, January 4, 2019 5:52:39 PM(UTC)

Josh Clark

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Was thanked: 10 time(s) in 10 post(s)

I have updated this project to use our version 20 toolkit and .NET framework 4.0 using Visual Studio 2017. I have also allowed the open file dialog to allow other video formats as input such as .avi and .mp4 (previously the open file dialog only allowed .mpg files). This project now builds to C:\LEADTOOLS 20\Bin\Dotnet4\x64 (Win32 for 32 bit) and outputs to C:\temp\images.

You can download the updated project here:

File Attachment(s):

NetCallbackOcr.zip (13kb) downloaded 83 time(s).

Josh Clark
Developer Support Engineer
LEAD Technologies, Inc.

#3 Posted : Wednesday, February 23, 2022 1:12:43 PM(UTC)

Marcus Andra

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This project has been updated to work for the v22 SDK and is using x64.

File Attachment(s):

NetCallbackOcr.zip (19kb) downloaded 6 time(s).

Marcus Andra
Developer Support Engineer
LEAD Technologies, Inc.

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