Support for large floating-point images

[sbesson]

See https://www.openmicroscopy.org/community/viewtopic.php?f=5&t=8630

Large floating-point images are a known limitation of the OMERO pyramid generation.

Such images will now open in OMERO.figure probably as per the support for large XY images. However as demonstrated in the forum post, the script export functionality currently fails because of this line:

https://github.com/ome/omero-figure/blob/cfa06bd7eb0416d8835c515f34f34ffc3c7731a0/omero_figure/scripts/omero/figure_scripts/Figure_To_Pdf.py#L1334-L1337

The condition for calling the render_big_image_region codepath in the export script is

https://github.com/ome/omero-figure/blob/cfa06bd7eb0416d8835c515f34f34ffc3c7731a0/omero_figure/scripts/omero/figure_scripts/Figure_To_Pdf.py#L1324-L1327

However the condition for having non-null zoom levels returned by the BlitzGateway is

https://github.com/openmicroscopy/openmicroscopy/blob/6bed02cffba74ba513ced3d0939235fa7ff2de34/components/tools/OmeroPy/src/omero/gateway/__init__.py#L8528-L8529

which includes the pixel type check in addition to the plane size.

There are a couple of options to address this issue however I am unclear what is the epxected contract and limitations:

• handle the case of image.getZoomLevelScaling returning None within render_big_image_region i.e. update the code to not assume that large XY images will have subresolution levels
• update is_big_image to also check img._re.requiresPyramid() and fallback to another code path rendering the plane/region instead of using render_big_image_region()
• disable support for exporting large XY images with no pyramidal levels in OMERO.figure

[lguerard]

Hi,

We encountered this issue again today with a 32-bit image, is there any workaround to still export the figure ?

Thanks !

[lguerard]

Hi,

We encountered this issue again today with a 32-bit image, is there any workaround to still export the figure ?

Thanks !