segment-anything-2 real-time

Run Segment Anything Model 2 on a live video stream

News

• 13/12/2024 : Update to sam2.1
• 20/08/2024 : Fix management of non_cond_frame_outputs for better performance and add bbox prompt

Demos

Getting Started

Installation

pip install -e .

Download Checkpoint

Then, we need to download a model checkpoint.

cd checkpoints
./download_ckpts.sh

Then SAM-2-online can be used in a few lines as follows for image and video and camera prediction.

Camera prediction

import torch
from sam2.build_sam import build_sam2_camera_predictor

sam2_checkpoint = "../checkpoints/sam2.1_hiera_small.pt"
model_cfg = "configs/sam2.1/sam2.1_hiera_s.yaml"
predictor = build_sam2_camera_predictor(model_cfg, checkpoint)

cap = cv2.VideoCapture(<your video or camera >)

if_init = False

with torch.inference_mode(), torch.autocast("cuda", dtype=torch.bfloat16):
    while True:
        ret, frame = cap.read()
        if not ret:
            break
        width, height = frame.shape[:2][::-1]

        if not if_init:
            predictor.load_first_frame(frame)
            if_init = True
            _, out_obj_ids, out_mask_logits = predictor.add_new_prompt(<your promot >)

        else:
            out_obj_ids, out_mask_logits = predictor.track(frame)
            ...

References:

• SAM2 Repository: https://github.com/facebookresearch/sam2