BlobBoards absolute-pose images (260527)

The raw captures of the 260527 absolute-pose session of BlobBoards: Robust Markers for Accurate Pose (BMVC 2026): the evaluation, calibration and intrinsic-calibration frames of the BlobBoards, AprilTag and ArUco rigs (260527/images/{bb,apr,uco,calibration_bb,calibration_apr,calibration_uco,intrinsics_calibration}). This record holds only the images, so that the data record downloads quickly. Everything else (motion-capture measurements, cameras of record, board definitions, the occlusion series, the descriptor training set and networks) is in the BlobBoards data record, doi:10.5281/zenodo.21998310 (version 1.3.0 and later); versions 1.0.0 to 1.2.0 of that record also carried this tarball. bb_absolute_pose_images_260527.tar.gz is a content-addressed Julia artifact that the bmvc2026 subproject of BlobBoards.jl fetches lazily through its Artifacts.toml (verified by sha256 and git-tree-sha1 on download), mounted under absolute_pose_experiments/. It is built by bmvc2026/scripts/make_zenodo_artifacts.jl (tier images) with Pkg's archive_artifact (Tar.jl: sorted entries, normalized mtime, owner and mode). It is the 1.2.0 tarball's tree without the two superseded camera files 260527/images/sony-fx3-iso100_tamron-20mm-f2.8-(set-to-f22).json and its _old.json (retired vgio/cameras/v1, never read; the camera of record is in the data record's bb_absolute_pose_inputs). The captures are unchanged. Licence: MIT, as the data record.