How to select on part of scan image

[trevorjdaniel]

Hello,

I am new to TWAIN and I am writing a scanning app.

I have the software working and can scan images and save them. Great!

But, I am trying to scan UK lottery tickets on an A4 scanner and the image always has lots of whitespace around the ticket which I would like to try and remove.

Is this a function that can be done via the TWAIN drivers or do I have to do it with image manipulation please?

Any advice would be greatly appreciated.

Thanks

[attachment=0:9as3ijuw]Scan0001.tif[/attachment:9as3ijuw]

[Catherine Sea]

You may first check if your TWAIN driver supports automatic border detection by showing the user interface or using TWAIN sample application.

If so, you can use ICAP_AUTOMATICBORDERDETECTION to turn on the feature.

Catherine Sea
http://www.dynamsoft.com

[trevorjdaniel]

@Catherine Sea wrote:

If so, you can use ICAP_AUTOMATICBORDERDETECTION to turn on the feature.

Catherine Sea
http://www.dynamsoft.com

Many thanks Catherine.

Unfortunately my HP Photosmart 7520 doesn’t appear to support it.

Trev

[Catherine Sea]

If your TWAIN driver doesn’t support the feature, you may also use a OCR SDK to achieve auto crop in your application.

[peterlee]

Have you ever found your way out?

[Foximage]

Yes, you may check out whether your Twain or OCR reader support for ROI, which means selecting and scanning a part of the source image or document page. And generally speaking, an ocr scanning tool can fast, accurately extract text from scanned documents, convert images to text-searchable formats such as PDF, PDF/A, DOC, DOCX, XML, and XPS. Besides, it can recognize text from over 40 languages and character sets including English, Spanish, French, German, Russian, Japanese, Chinese, Arabic* and more

[peterlee]

Hi, Foximage.
I do agree with you. Thanks for your nice sharing. An OCR component does matter on converters, like pdf to text conversion work on a pdf coverter. Do you have any good recommendation about the related pdf conversion sdk? Any suggetsion will be appreciated. Thanks in advance.

Best regards,
Lee

[RomanceOsborn]

you can use ICAP_AUTOMATICBORDERDETECTION to turn on the feature.
gclub

[mikelilin]

I do agree with you. Thanks for your nice sharing. An OCR component does matter on converters, like pdf to text conversion work on a pdf coverter. Do you have any good recommendation about the related pdf conversion sdk? Any suggetsion will be appreciated. Thanks in advance.

as i know, PDFLib control can convert pdf to text, it’s an open source library, free to use.

[Author]

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