Write a huge (500,000 X 100,000) as .svs or .tiff format about pyvips HOT 15 CLOSED

Hello, you can't write SVS, it's a read-only format.

Do you want a command-line? Try:

vips black x.tif 500000 100000

It'll obviously take a while!

from pyvips.

Yes by doing pyramid=True. However is there any way to only restrict the number of layers alongwith pyramid? It gives 10 layers by default.

from pyvips.

Oh, sorry, pyvips. Try:

import pyvips

huge_image = pyvips.Image.black(500000, 100000)
huge_image.write_to_file("x.tif")

from pyvips.

Thanks for the quick reply. I have a numpy array of size that big. I want to write it as to be read compatibly by openslide which leaves me with an option of only tiff images.

from pyvips.

You can go numpy -> vips like this:

https://github.com/libvips/pyvips/blob/master/examples/pil-numpy-pyvips.py

You probably saw.

I would save as a tiled jpeg bigtiff, so:

huge_image.tiffsave("x.tif", tile=true, compression=jpeg, bigtiff=true)

from pyvips.

I got this error:
I used numpy to vips conversion and wrote it into pyimg. sourcenorm is an numpy array for a color image. Here s is a string containing path for saving the .tif extension file.

pyimg = numpy2vips(sourcenorm)
 pyimg.tiffsave(s, tile=True, compression='jpeg', bigtiff=True)
  File "/home/deepakanand/.local/lib/python2.7/site-packages/pyvips/vimage.py", line 799, in call_function
    return pyvips.Operation.call(name, self, *args, **kwargs)
  File "/home/deepakanand/.local/lib/python2.7/site-packages/pyvips/voperation.py", line 132, in call
    op = Operation.new_from_name(operation_name)
  File "/home/deepakanand/.local/lib/python2.7/site-packages/pyvips/voperation.py", line 60, in new_from_name
    raise Error('no such operation {0}'.format(operation_name))
pyvips.error.Error: no such operation tiffsave
  VipsOperation: class "tiffsave" not found

from pyvips.

Looks like your libvips has been built without tiff support. Did you make it yourself? Check the output of libvips configure and make sure you have the libtiff headers.

from pyvips.

Thanks for such response.
Can you provide me a stepwise instruction for rebuilding it. I was not able to build it as one go. There were errors. However, later it started to work.
I am running Ubuntu 16.04, python 2.7.

from pyvips.

There's a chapter in the docs:

https://libvips.github.io/libvips/install.html#building-libvips-from-a-source-tarball

it's like building any linux project.

but are you sure you need to build libvips? The version that's included with Ubuntu 16.04 should work.

from pyvips.

If libvips is already there then how to add support for Tiffsave.

from pyvips.

Because you have installed your own libvips which does not have tiff support. Remove it and install the Ubuntu one instead.

from pyvips.

Cool! I will do it and get back to you. Thanks again. You are one of the most active guys in handling issues.

from pyvips.

I was able to write the image as .tif format but openslide fails to read it. Do I need to read the created files using vips only?

from pyvips.

Openslide recognizes the file if it has multiple layers. Thanks a lot.

from pyvips.

Ah OK, good to know. That's with pyramid=True I guess?

from pyvips.