John Cupitt comments

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                                            John Cupitt

DICOM with J2K reversible transfer syntax and RCT photometric interpretation (was, mixture of transfer syntaxes and ANN files in folder) won't open

@dclunie would you mind posting a screenshot of roughly what that slide should look like? It'd be helpful while testing a PR.

DICOM with J2K reversible transfer syntax and RCT photometric interpretation (was, mixture of transfer syntaxes and ANN files in folder) won't open

The slide loads well with libdicom and openslide using the small patch above, except for the hilariously wrong colours. I'll try making a PR that includes the correct colour transform.

DICOM with J2K reversible transfer syntax and RCT photometric interpretation (was, mixture of transfer syntaxes and ANN files in folder) won't open

Thank you! I get a good match to QuPath 0.5.1 here: Though it looks less saturated than your screenshot. Perhaps you are using a non-sRGB gamut? However that's treating the...

DICOM with J2K reversible transfer syntax and RCT photometric interpretation (was, mixture of transfer syntaxes and ANN files in folder) won't open

I made a trivial PR that adds support for `YBR_RCT`.

Create svs file with image pyramid, label and macro in pyvips?

Hi @tuttelikz, SVS is not a standard TIFF format, so standard TIFF readers and writers can't handle it. pyvips uses the openslide library to read SVS, but there's no SVS...

Create svs file with image pyramid, label and macro in pyvips?

DICOM is the standard non-vendor format for WSI images, so that'd be the one to pick IMO. QuPath uses OME TIFF, so you could try that. It's pretty simple --...

Add EXIF support to TIFF load and save

Hi @dersmon, libvips does not support EXIF in TIFF, so it won't see any orientation information stored there. We've talked a few times about fixing this, but it's not easy,...

Add EXIF support to TIFF load and save

PNG, JPG, etc. store EXIF metadata as a binary blob which can be parsed by libexif. TIFF has EXIF as a subdirectory of the image: ``` $ tiffinfo 2698060_kicsi.tif ===...

Add EXIF support to TIFF load and save

... I'll turn this into an enhancement issue.

DICOM J2K wrong color with YBR_ICT and rejects YBR_RCT photometric interpretation

I see this issue with git master openslide too, fwiw. I'm working on the openslide DICOM loader at the moment, so I can take a look at this too, if...