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#1 Posted : Monday, April 9, 2007 3:21:29 AM(UTC)

amitt  
amitt

Groups: Registered
Posts: 2


Hi

      We are using some image compression format and saving the imagw with .tif .I want to reduce the size for the image to minimum also the quality should be moderate.Scan the same document with different options.Size used for document is 8.5 X 11.

Black & white  : Saved size  156 KB

Bits : 1

Quality : 124

Compression : FILE_CCITT_GROUP4

Resolution : 300

 GreyScale : Saved size   83.3 KB

Bits : 8

Quality : 124

Compression : FILE_TIF_JPEG

Resolution : 300

Color Image : Size size 83.9 KB

Bits : 8

Quality : 124

Compression : FILE_TIF_PACKBITS

Resolution : 100

Hi Color  saved size 83.3 KB

Bits : 24

Quality : 124

Compression : FILE_TIF_JPEG

Resolution : 100

      Suggest the best compression technique for all above which work better with Leadtools 14.5.So that images are stored in smaller size with the quality

 

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#2 Posted : Tuesday, April 10, 2007 10:32:51 AM(UTC)

GregR  
GregR

Groups: Registered, Tech Support, Administrators
Posts: 764


For black and white images, TIFF_CCITT_G4 is the best compression.  For Grayscale or Color, use TIFF_JPEG_411 with a high QFactor if image quality is not of great concern.  If Image quality IS a concern, then use either a lower QFactor and/or JPEG_422 or even better JPEG_444 (which is just JPEG).


Also consider scanning the images in at a lower resolution if you don't mind losing some quality.
 
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