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March 2006

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2006.03.28 10:39 "JPEG in TIFF , how to directly write JPEG Tables in order to control the jpeg compr ession quality.", by <yourpattern@126.com>

2006.03.30 10:21 "IJG in TIFF , control image qualit y by using quantity table in stead of jpe g_set_quality()", by <yourpattern@126.com>

2006.03.30 10:21 "IJG in TIFF , control image qualit y by using quantity table in stead of jpe g_set_quality()", by <yourpattern@126.com>

Hi,All

I want something like this:
1.set jpegtables tag in TIFF,using TIFFSetField(...)
2.IJG in TIFFLIB will using the jpegtables i set as quantity table to
compression the image.

instead of call jpeg_set_quality() to set the quality and thus generate
responding quantity table.
 
Has anyone already done such a similiar things ?
 
After i read the relative code of IJG,it seems we can do some work in 
these functions: 
 
jpeg_set_linear_quality 
jpeg_add_quant_table 
jpeg_quality_scaling 
 
If anyone happen to know ,pls send me some useful informations, 
include some sample code will be greatly appreciated. 
thanks in advance. 

Kingore@126.com