RetSAM-Reannotation

Original fundus images and reannotations associated with RetSAM, grouped by source dataset.

Dataset	Images	Vessel	OD	OC	EX	HE
DRIVE	40	40	39	39	16	8
HRF	45	45	45	45	21	38
GAMMA	100	100	100	98	16	3
IDRiD	81	81	79	79	78	80
Total	266	266	263	261	131	129

Annotation columns count images with nonempty labels. OD/OC = optic disc/cup; EX = hard exudates; HE = hemorrhages. MA and SE masks are included but are all empty in this export.

Included: 266 original images, 266 XML files, 1,354 raw object masks, and 1,596 merged masks (six per image). All image and annotation files retain their original bytes.

Each of DRIVE/, HRF/, GAMMA/, and IDRiD/ contains:

• images/: original photographs.
• annotations/: complete source XML and Masks/ with individual objects, including separate artery and vein labels.
• masks/{vessel,odoc,ex,he,ma,se}/: merged grayscale masks.
• metadata.jsonl and splits/: image mapping and existing local train/val/test assignments. Paths are relative to the repository root.

Encoding: OD/OC: 0 = background, 127 = disc excluding cup, 255 = cup; full disc = mask > 0. Other merged masks: foreground = mask > 0. Raw RGBA object masks: foreground = alpha > 0.

Missing OD/OC: DRIVE 30_training and IDRiD IDRiD_10, IDRiD_66 lack both; GAMMA 0024, 0080 lack OC. Missing annotations are not verified negatives. GAMMA contains 100 public training images; its local splits do not represent hidden challenge test labels.

Original image terms remain those of DRIVE, HRF, GAMMA, and IDRiD. No additional annotation license is assigned here.