HDL – Load Worker Images
HCM Data Loader can be used to mass upload worker images. The actual image file should be put in a BlobFiles folder and should be referenced in actual Worker.dat file.
Post this, Worker.dat will be zipped together with BlobFiles folder and uploaded into HCM using Import and Load.

METADATA|PersonImage|Image|ImageName|PersonNumber|SourceSystemOwner|SourceSystemId
MERGE|PersonImage|XYZ_12364.jpg|XYZ_12364|12364|EBS-HR|12364
XYZ_12364.jpg file should be present under BlobFiles.