Find OCR results of a specific zone

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This topic and its replies were posted before the current version of LEADTOOLS was released and may no longer be applicable.

#1 Posted : Thursday, February 15, 2007 11:28:17 AM(UTC)

Francis

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Posts: 2

How can we distinguish OCR result form a specific zone, or is it possible to OCR a specific zone?


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#2 Posted : Monday, February 19, 2007 10:50:00 AM(UTC)

Adnan Ismail

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The result's Recognized Characters contain the zone index for which each character belongs.

You cannot OCR a specific zone in a scanned image if there are multiple zones defined. One way to do it is:
1. Save the zone information into a temporary zone data file.
2. Delete all Zones except the one you need.
3. Recognize the Image you have.
4. Restore the information by loading the zone data file.

#3 Posted : Monday, February 19, 2007 11:26:27 AM(UTC)

Francis

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Posts: 2

Hi,

I am working with an OCR Form Processing Application. Zonal OCR would have been the ideal method.

I have tried the work-around as you have suggested, It's working. It may have performance implication with lot of pages.

Can you please provide code snippet to Fit the image vertically/horizontally to LeadRasterViewer. Where I can find a comprehensive documentation..

Can we use LeadMaster Control for OCR .

Thanks

#4 Posted : Wednesday, February 21, 2007 12:04:32 AM(UTC)

Maen Hasan

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Hello,

If you are using the COM programming interface, you can implement vertical Fit as follows:
+------------------------+
Dim x As Double
Form1.ScaleMode = vbPixels
LEADRasterView1.ScaleMode = SCALEMODE_PIXEL
x = LEADRasterView1.ScaleHeight / LEADRasterView1.Raster.BitmapHeight
LEADRasterView1.PaintZoomFactor = x * 100
+------------------------+

Also, you can implement the Horizontal Fit as follows:
+------------------------+
Dim x As Double
Form1.ScaleMode = vbPixels
LEADRasterView1.ScaleMode = SCALEMODE_PIXEL
x = LEADRasterView1.ScaleWidth / LEADRasterView1.Raster.BitmapWidth
LEADRasterView1.PaintZoomFactor = x * 100
+------------------------+

Thanks,
Maen Badwan
LEADTOOLS Technical Support

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