Some tiff file not support with Image
lazarus / 39-Graphics

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xiyi0616 · 2024-06-12 19:32

I am bad english.

I encountered an exception error while calling the TTiffImage
LoadFromFile function.
"
"compression CCITT Group4 fax encoding not supported yet at position
38"

How can I get some solutions?

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jamie · 2024-06-12 22:02

Read here/

https://en.wikipedia.org/wiki/Group_4_compression

Looks like an improvement over G3 with simple EOL removals.

be the first to add it to the TIFF format

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xiyi0616 · 2024-06-12 23:00

Thank you for reply!

 Are there any ready-made decoding components in FreePascal? (It's too
troublesome to decode by myself)

LibTiff can handle the Group4 format. There is a corresponding Delphi
version called LibTiffDelphi. Can it be converted to a Lazarus
version?