Reducing bit depth

[Deleted_U_Intel]

Hi all

There is new function in IPP40 - ippiConvert_8u1u_C1R.
I'd like ask what is threshold level for Stucki's dithering(and its scope). Also i'm afraid i can't understand by the proper way what should i put in place - Offset (in bits) in the first byte of the source image row.

Thanks,
Adi

[Intel_C_Intel]

Hi, Adi

Did you read the IPPI Developers Manual? Please take a look on Chapter 4, Image Data Exchange Functions for details about bit offset and Stucki's dithering. And, come back if youwill have questions:)

Regards,
Vladimir

[Intel_C_Intel]

Adi,

Stucki's error diffusionalgorithm implemented in IPP was done according the book, Stuckie, P 1981 "MECCA - a multiple-error correcting computation algorithm for bilevel image hardcopy rereproduction", Research Report RZ1060, IBM Research Laboratory, Zurich, Switcherland

The error filter is rectangular grid with weights as below

x 8 4

2 4 8 4 2 / 42

1 2 4 2 1

Regards,
Vladimir