PIL.Image.frombuffer/string ... who do data using?

[ivan.dm]

hello again everyone!

I'm writing a wrapper for tif file that parse its and return the data
image in this way below :

self.fp.seek(St ripOffsets)
data = self.fp.read(St ripByteCounts)
return data

where:
self.fp is a file object
StripOffsets is a offset position of image
StripByCounts is extend of image

after we get a data, now to set its in PIL.Image.froms tring(...)
but ( evely! :) ), returned this error follow:

ValueError
"not enough image data"

why???

Should I to convert data in other format???

any suggestion?

Thanks and regard.

Ivan

[Peter Hansen]

Re: PIL.Image.fromb uffer/string ... who do data using?

ivan.dm wrote:[color=blue]
> I'm writing a wrapper for tif file that parse its and return the data
> image in this way below :
>
> self.fp.seek(St ripOffsets)
> data = self.fp.read(St ripByteCounts)
> return data[/color]
....[color=blue]
> after we get a data, now to set its in PIL.Image.froms tring(...)
> but ( evely! :) ), returned this error follow:
>
> ValueError
> "not enough image data"[/color]

Why are you doing it this way instead of just using Image.open()? PIL
already knows how to read and convert TIFF images...

-Peter

[ivan.dm]

Re: PIL.Image.fromb uffer/string ... who do data using?

Peter Hansen ha scritto:[color=blue]
> ivan.dm wrote:
>[color=green]
>> I'm writing a wrapper for tif file that parse its and return the data
>> image in this way below :
>>
>> self.fp.seek(St ripOffsets)
>> data = self.fp.read(St ripByteCounts)
>> return data[/color]
>
> ...
>[color=green]
>> after we get a data, now to set its in PIL.Image.froms tring(...)
>> but ( evely! :) ), returned this error follow:
>>
>> ValueError
>> "not enough image data"[/color]
>
>
> Why are you doing it this way instead of just using Image.open()? PIL
> already knows how to read and convert TIFF images...
>
> -Peter
>[/color]
yes! for all format it can decode, except for compression G3/G4.
I'm searching a method for decode this compression format

Ivan