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(StripOffsets)
data = self.fp.read(StripByteCounts)
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.fromstring(...)
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]

ivan.dm wrote:

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

self.fp.seek(StripOffsets)
data = self.fp.read(StripByteCounts)
return data .... after we get a data, now to set its in PIL.Image.fromstring(...)
but ( evely! :) ), returned this error follow:

ValueError
"not enough image data"

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]

Peter Hansen ha scritto:

ivan.dm wrote:

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

self.fp.seek(StripOffsets)
data = self.fp.read(StripByteCounts)
return data

...

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

ValueError
"not enough image data"

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

-Peter

yes! for all format it can decode, except for compression G3/G4.
I'm searching a method for decode this compression format

Ivan