Reference for ultralytics/models/sam/modules/sam.py

def __init__(
    self,
    image_encoder: ImageEncoderViT,
    prompt_encoder: PromptEncoder,
    mask_decoder: MaskDecoder,
    pixel_mean: List[float] = (123.675, 116.28, 103.53),
    pixel_std: List[float] = (58.395, 57.12, 57.375),
) -> None:
    """
    Initialize the Sam class to predict object masks from an image and input prompts.

    Note:
        All forward() operations moved to SAMPredictor.

    Args:
        image_encoder (ImageEncoderViT): The backbone used to encode the image into image embeddings.
        prompt_encoder (PromptEncoder): Encodes various types of input prompts.
        mask_decoder (MaskDecoder): Predicts masks from the image embeddings and encoded prompts.
        pixel_mean (List[float], optional): Mean values for normalizing pixels in the input image. Defaults to
            (123.675, 116.28, 103.53).
        pixel_std (List[float], optional): Std values for normalizing pixels in the input image. Defaults to
            (58.395, 57.12, 57.375).
    """
    super().__init__()
    self.image_encoder = image_encoder
    self.prompt_encoder = prompt_encoder
    self.mask_decoder = mask_decoder
    self.register_buffer("pixel_mean", torch.Tensor(pixel_mean).view(-1, 1, 1), False)
    self.register_buffer("pixel_std", torch.Tensor(pixel_std).view(-1, 1, 1), False)