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#1 Posted : Tuesday, June 24, 2008 10:02:31 AM(UTC)
aallasudheer

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Posts: 18


Hi,

.NET 15 , C#

I am scanning some documents using TWAIN, and saving them in Tiff format, each file size is around 8.5mb, is there a way to reduce the file size (Same format), without losing quality?

Thanks,

Sudheer

 

 

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#2 Posted : Wednesday, June 25, 2008 2:36:20 AM(UTC)

Yasir Alani  
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LEADTOOLS supports saving to TIF file format with a wide variety of compressions. Which one exactly are you using when you are saving your files?

In general, if you want to save as black and white, a very good result can be achieved using the constant TifCcittGroup4 (saves as TIF compressed using CCITT, group 4).

If you want to save as color, then this depends on 4 main factors:
1. What is the color depth (8 bits per pixel, 24, or something else)?
2. Do you want the compression to be completely lossless, or very high quality lossy? Lossy compression is better at reducing size.
3. Which LEADTOOLS toolkit do you own? Some compression types are only supported in Document Imaging toolkits or require additional purchase.
4. Do you need your images to be opened by other common viewers, or you only care about your own viewer? Some formats give good compression, but are not commonly used.
 
#3 Posted : Wednesday, June 25, 2008 7:29:18 AM(UTC)
aallasudheer

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Posts: 18


Thanks for the quick reply, we are using .NET LeadTools documents imaging suite 15.

We are saving images in color. Currently we are saving in uncompressed Tiff format, color depth 8. We are looking for lossless compression. Yes, we are looking for common format.

Thanks,

Sudheer

 

 
#4 Posted : Wednesday, June 25, 2008 8:26:49 AM(UTC)

jigar  
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TifLzw would be the best option.  It's lossless, has good compression, and widely supported.
 
#5 Posted : Thursday, June 26, 2008 1:44:28 PM(UTC)
aallasudheer

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Posts: 18


Thank you, we are also thinking about PDF/A, Does leadtools support this format? Currenltly we are doing OCR/ICR/Barcode and annotations with the tiff images.

Thanks,

Sudheer

 

 
#6 Posted : Friday, June 27, 2008 5:44:49 AM(UTC)

Walter  
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Our upcoming release of LEADTOOLS v16 will support PDF/A.
Walter Bates
Senior Support Engineer
LEAD Technologies, Inc.
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