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haerle
Total Points:
130
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80
Green Belt
June 8, 2009 2:17 AM PDT
JPEG2000 codec settings in Unified Image Codec sample for Windows
Hello,

The encode_jpeg2000 function of the UIC sample just initializes the JP2Encoder class with it's default parameters.
How do I change the quality settings (to get a smaller file, a faster compression, etc.) for the JPEG2000 encoding?

I tried several parameters with jp2enc.SetParams. For example:

jp2enc.SetParams(20, true, true, false, 2, 10, 0xFFFFFFFF);

This neither influences the target file's size nor the compression time considerably. Are there other parameters which I have overlooked? Do I have to initlialize some other class?

Thx for your help,

Fabian

P.S.: Will dstSize = 0xFFFFFFFF work on 64bit?
Vladimir Dudnik (Intel)
Total Points:
26,380
Status Points:
26,380
Black Belt
June 8, 2009 9:48 AM PDT
Rate
 
#1
Fabian,

please take a look at UIC picnic application, where you can set JPEG2000 encoder parameters through GUI application

To support files with big size you may need to implement another variant of StdFileInput class. The implementation in UIC rely on fread CRT function.

Regards,
  Vladimir


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