Images

Image data are organized in a two-tiered structure. In a first tier, a SOLR core called “images” contains an index of all the available image files. The files themselves are stored in a second system powered by OMERO.

Because of this layered structure, image downloads proceed in two steps. A query to the SOLR core is first needed to identify paths to relevant image files, which can then be downloaded separately. Some SOLR fields relevant to images are listed in the following table.

Field name	Description
omero_id	Unique identifier in the OMERO image system
download_url	URL of original image (dicom, tiff, or jpeg)
jpeg_url	URL of a high-resolution image file

Example – images for a parameter

Query criteria:

Parameter identifier: IMPC_XRY_034_001 (“XRay Images Dorso Ventral”) 

Colony identifier: MEAW

Query URL:

https://www.ebi.ac.uk/mi/impc/solr/impc_images/select?q=parameter_stable_id:IMPC_XRY_034_001%20AND%20colony_id:MEAW&wt=json&indent=true

Example – images from a phenotyping centre

Query criteria:

Phenotyping centre: WTSI

Query URL:

https://www.ebi.ac.uk/mi/impc/solr/impc_images/select?q=phenotyping_center:WTSI&wt=json&indent=true