Decompress 32 bit tiff file each layer image data for ZIP

[Ranjan v363023678y2w]

hi all,
i have saved the 32 bit tiff file layer compression type as "ZIP compression" and i have retrieved the compressed data from tiff file. so now how can i decompress that data of each layer image for 32 bit tiff file.
can anyone please help me to get this data or any method to decompress 32 bit image data of each layer.

Thank you

[davescm]

Why not just open the file? Once loaded in memory it is uncompressed.

Dave

[Ranjan v363023678y2w]

@davescm thanks for your Response.
i have the compressed data of 32 bit tiff file layer image , which compressed using zip while saving tiff file.
but i need help that i want to decompress 32 bit tiff file layer image data for zip decompression.
thanks

[D Fosse]

Opening the file decompresses it. There is nothing more to decompress.

[Ranjan v363023678y2w]

@D Fosse  thanks for your response
i have retrieved  32 bit tiff file other layer information  like layer name and other layer properties.
and i have retrieved the each layer image data from tiff file. and the data of each layer information is compressed zip type. so i want to decompress that each layer image data and i want to create PNG image from that image data.
thank you

[Stephen Marsh]

Is this a SDK specific question? Is it action specific? If scripting, is this ExtendScript or UXP?

[Ranjan v363023678y2w]

@Stephen Marsh  thanks for your response./
i have used libtiff library to get the layer information and layer image data.
the image data is in compressed format zip compression type and i want to decompress the data . is there any code that will decompress image data "ZIP WithPredictor" for tiff file

[Stephen Marsh]

Sorry, I can't help with SDK, I just wanted to clarify your requirements so that someone with the appropriate knowledge can answer.

[Ranjan v363023678y2w]

hi all,
how photoshop using to save 8,16 and 32 bit image data of each layer image , meaning which method is using to save image data of each layer for the compression type ZIP .
thanks

[davescm · Accepted solution]

See if this helps : https://stackoverflow.com/questions/44830246/decompressing-deflated-tiff-data

Dave

[Ranjan v363023678y2w]

thanks @davescm it works