Metadata Queries
Metadata Query Examples
“Show me images from the rear camera, at night time, taken while traveling between 50 and 75 miles per hour”
metadata.camera = "rear" AND metadata.timeofday = "night" AND metadata.speed_mph >= 50 AND metadata.speed_mph <= 75
“Show me every 5th image from this video sequence”
metadata.sequence_id = "abcdef" AND metadata.frame_number % 5 = 0
“Show me all images whose annotations I have rejected using Nucleus”
metadata.review_status = "rejected"
“Show me all images that I have not QA’ed in Nucleus using the ‘Review Ground Truth’ featurer”
metadata.review_status != "rejected" AND metadata.review_status != "accepted"
Metadata Query - Details
Query based on user-defined metadata at the dataset item level. User-defined metadata is specified during dataset item upload. Additionally, some fields of user-defined metadata can be created from the Nucleus UI. Currently, the only such field is review_status
, which is created and set to either accepted
or rejected
whenever you thumbs-up or thumbs-down an image after clicking “Review Ground Truth” in the single-image viewer.
To query based on annotation-level metadata, see
Annotations. Querying on prediction-level metadata is currently not supported.
Metadata field values can have three types: numerical, categorical, and text. See the full metadata documentation for details.
metadata. | Prefix for all user metadata based queries |
metadata.[field_name] | The value of this user-defined metadata attribute |
metadata.review_status | If defined, either accepted or rejected . This field is automatically created when you use the “Review Ground Truth” feature when looking at a single Nucleus image. |
Updated over 2 years ago