It's fantastic : Many responses to my problems. Thank you very much.
----- Original Message ----- From: "J.Pietschmann" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Monday, June 24, 2002 9:59 PM Subject: Re: What kind of TIFF does FOP support > Rodolphe VAGNER wrote: > > In fact the first tests I've done seem to indicate the contrary : > > my uncompressed file is a black area and my CCITT Gr4 or 3, and LWZ > > compressed files > > are well rendered. > > It's bizarre, isn'it ? > > What about jimy ? where can I find doc on it ? > > Ok, here it goes. > The Jimi home page is > http://java.sun.com/products/jimi/ > You can download the whole package there, including > Source, JavaDoc and, most valuable, additional docs > describing supported file and image formats. > > For TIFF, the following compression schemes are supported > - Uncompressed images > - CCITT compressed Bi-level images with CCITT RLE, CCITT > Group 3 1D Fax, CCITT Group 3 2D Fax, CCITT Group 4 Fax > - CCITT Class F Fax > - Packbits compressed images (a simple RLE type compression) > - LZW Compressed images > JPEG compression is not supported. > > The TIFF spec is available from > http://partners.adobe.com/asn/developer/PDFS/TN/TIFF6.pdf > Compression schemes are > Packbits: run length encoding (Sec. 9) > CCITT G3 Fax (Sec. 10) > CCITT Bilevel (Sec. 11) > LZW (Sec. 13) > JPEG (Sec. 22) > CCITT Class F compression is apparently defined in a RFC, > for example available here: > http://www.zvon.org/tmRFC/RFC2306/Output/chapter3.html > > It is also mentioned that Jimi does only understand > black and white (bilevel), grayscale (palette) and RGB > (palette and direct color). CMYK, Cie L*a*b* and YCbCr > color models are not implemented. > > It is not mentioned whether compression predictors are > supported, I supposed not (does anybody use them?). It is > also not explicitely noted how Jimi deals with alpha > channels. > > If uncompressed TIFF comes out black, probably the color > model or palette size is inconvenient for Jimi. > > J.Pietschmann >
