Set Colour & BW Compression for mixed multipages

[mattewan]

Hello Loic,

Would it be possible to have something like:

oGDPicture.setColorCompression = "JPEG"
oGDPicture.setBWCompression = "CCITT4"

then make a call to:

oGdPicture.TiffSaveAsMultiPageFile(ImageID1, "multipage.tif", TiffCompression.TiffCompressionAUTO)

As we dont want to use LZW compression for colour pages.

Kind Regards,

Matthew Jones

[Loïc]

Hi Matthieu,

Currently bitonal images are encoded in CCITT4 using the Auto compression mode and colour in LZW.

To use JPEG you have to specify JPEG compression.

Now if you want to have a multipage with CCITT4 compression for bitonal image and JPEG for color we do not provide this feature for now. This should be introduced in a medium release of GdPciture.NET 7.

Kind regards,

Loïc

[Ezio]

Hello Loic,
are there some news about this argument?
are you planning to implement a TIFF compression scheme using CCITT Gr4 for BW images and JPEG for color images?
this is a MUST for common document capture applications.
LZW is not suitable for real application.
Using LZW compression produce large image file.

Kind regards,
Ezio

[Loïc]

Hi Ezio,

Unfortunately we did not get any progress on this. We concentrate our efforts on other features.
For doc. capture application we suggest PDF format. With GdPicture you can compress colour image in JPEG and bitonal image in JBIG2.

Kind regards,

Loïc