https://akashicarchives.net/a/blvh:process:abbyy_loose_crop https://akashicarchives.net/a/blvh:process:image_type_estimate https://akashicarchives.net/a/blvh:q:machine_metadata_as_hypothesis https://akashicarchives.net/a/blvh:dataset:ocr https://akashicarchives.net/a/blvh:sample:v0_2