This topic and its replies were posted before the current version of LEADTOOLS was released and may no longer be applicable.
#1
Posted
:
Monday, April 9, 2007 3:21:29 AM(UTC)
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
#2
Posted
:
Tuesday, April 10, 2007 10:32:51 AM(UTC)
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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