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Referencia para ultralytics/engine/predictor.py

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ultralytics.engine.predictor.BasePredictor

BasePredictor.

Una clase base para crear predictores.

Atributos:

Nombre Tipo Descripci贸n
args SimpleNamespace

Configuraci贸n del predictor.

save_dir Path

Directorio para guardar los resultados.

done_warmup bool

Si el predictor ha terminado de configurarse.

model Module

Modelo utilizado para la predicci贸n.

data dict

Configuraci贸n de datos.

device device

Dispositivo utilizado para la predicci贸n.

dataset Dataset

Conjunto de datos utilizado para la predicci贸n.

vid_writer dict

Dictionary of {save_path: video_writer, ...} writer for saving video output.

C贸digo fuente en ultralytics/engine/predictor.py
class BasePredictor:
    """
    BasePredictor.

    A base class for creating predictors.

    Attributes:
        args (SimpleNamespace): Configuration for the predictor.
        save_dir (Path): Directory to save results.
        done_warmup (bool): Whether the predictor has finished setup.
        model (nn.Module): Model used for prediction.
        data (dict): Data configuration.
        device (torch.device): Device used for prediction.
        dataset (Dataset): Dataset used for prediction.
        vid_writer (dict): Dictionary of {save_path: video_writer, ...} writer for saving video output.
    """

    def __init__(self, cfg=DEFAULT_CFG, overrides=None, _callbacks=None):
        """
        Initializes the BasePredictor class.

        Args:
            cfg (str, optional): Path to a configuration file. Defaults to DEFAULT_CFG.
            overrides (dict, optional): Configuration overrides. Defaults to None.
        """
        self.args = get_cfg(cfg, overrides)
        self.save_dir = get_save_dir(self.args)
        if self.args.conf is None:
            self.args.conf = 0.25  # default conf=0.25
        self.done_warmup = False
        if self.args.show:
            self.args.show = check_imshow(warn=True)

        # Usable if setup is done
        self.model = None
        self.data = self.args.data  # data_dict
        self.imgsz = None
        self.device = None
        self.dataset = None
        self.vid_writer = {}  # dict of {save_path: video_writer, ...}
        self.plotted_img = None
        self.source_type = None
        self.seen = 0
        self.windows = []
        self.batch = None
        self.results = None
        self.transforms = None
        self.callbacks = _callbacks or callbacks.get_default_callbacks()
        self.txt_path = None
        self._lock = threading.Lock()  # for automatic thread-safe inference
        callbacks.add_integration_callbacks(self)

    def preprocess(self, im):
        """
        Prepares input image before inference.

        Args:
            im (torch.Tensor | List(np.ndarray)): BCHW for tensor, [(HWC) x B] for list.
        """
        not_tensor = not isinstance(im, torch.Tensor)
        if not_tensor:
            im = np.stack(self.pre_transform(im))
            im = im[..., ::-1].transpose((0, 3, 1, 2))  # BGR to RGB, BHWC to BCHW, (n, 3, h, w)
            im = np.ascontiguousarray(im)  # contiguous
            im = torch.from_numpy(im)

        im = im.to(self.device)
        im = im.half() if self.model.fp16 else im.float()  # uint8 to fp16/32
        if not_tensor:
            im /= 255  # 0 - 255 to 0.0 - 1.0
        return im

    def inference(self, im, *args, **kwargs):
        """Runs inference on a given image using the specified model and arguments."""
        visualize = (
            increment_path(self.save_dir / Path(self.batch[0][0]).stem, mkdir=True)
            if self.args.visualize and (not self.source_type.tensor)
            else False
        )
        return self.model(im, augment=self.args.augment, visualize=visualize, embed=self.args.embed, *args, **kwargs)

    def pre_transform(self, im):
        """
        Pre-transform input image before inference.

        Args:
            im (List(np.ndarray)): (N, 3, h, w) for tensor, [(h, w, 3) x N] for list.

        Returns:
            (list): A list of transformed images.
        """
        same_shapes = len({x.shape for x in im}) == 1
        letterbox = LetterBox(self.imgsz, auto=same_shapes and self.model.pt, stride=self.model.stride)
        return [letterbox(image=x) for x in im]

    def postprocess(self, preds, img, orig_imgs):
        """Post-processes predictions for an image and returns them."""
        return preds

    def __call__(self, source=None, model=None, stream=False, *args, **kwargs):
        """Performs inference on an image or stream."""
        self.stream = stream
        if stream:
            return self.stream_inference(source, model, *args, **kwargs)
        else:
            return list(self.stream_inference(source, model, *args, **kwargs))  # merge list of Result into one

    def predict_cli(self, source=None, model=None):
        """
        Method used for CLI prediction.

        It uses always generator as outputs as not required by CLI mode.
        """
        gen = self.stream_inference(source, model)
        for _ in gen:  # noqa, running CLI inference without accumulating any outputs (do not modify)
            pass

    def setup_source(self, source):
        """Sets up source and inference mode."""
        self.imgsz = check_imgsz(self.args.imgsz, stride=self.model.stride, min_dim=2)  # check image size
        self.transforms = (
            getattr(
                self.model.model,
                "transforms",
                classify_transforms(self.imgsz[0], crop_fraction=self.args.crop_fraction),
            )
            if self.args.task == "classify"
            else None
        )
        self.dataset = load_inference_source(
            source=source,
            batch=self.args.batch,
            vid_stride=self.args.vid_stride,
            buffer=self.args.stream_buffer,
        )
        self.source_type = self.dataset.source_type
        if not getattr(self, "stream", True) and (
            self.source_type.stream
            or self.source_type.screenshot
            or len(self.dataset) > 1000  # many images
            or any(getattr(self.dataset, "video_flag", [False]))
        ):  # videos
            LOGGER.warning(STREAM_WARNING)
        self.vid_writer = {}

    @smart_inference_mode()
    def stream_inference(self, source=None, model=None, *args, **kwargs):
        """Streams real-time inference on camera feed and saves results to file."""
        if self.args.verbose:
            LOGGER.info("")

        # Setup model
        if not self.model:
            self.setup_model(model)

        with self._lock:  # for thread-safe inference
            # Setup source every time predict is called
            self.setup_source(source if source is not None else self.args.source)

            # Check if save_dir/ label file exists
            if self.args.save or self.args.save_txt:
                (self.save_dir / "labels" if self.args.save_txt else self.save_dir).mkdir(parents=True, exist_ok=True)

            # Warmup model
            if not self.done_warmup:
                self.model.warmup(imgsz=(1 if self.model.pt or self.model.triton else self.dataset.bs, 3, *self.imgsz))
                self.done_warmup = True

            self.seen, self.windows, self.batch = 0, [], None
            profilers = (
                ops.Profile(device=self.device),
                ops.Profile(device=self.device),
                ops.Profile(device=self.device),
            )
            self.run_callbacks("on_predict_start")
            for self.batch in self.dataset:
                self.run_callbacks("on_predict_batch_start")
                paths, im0s, s = self.batch

                # Preprocess
                with profilers[0]:
                    im = self.preprocess(im0s)

                # Inference
                with profilers[1]:
                    preds = self.inference(im, *args, **kwargs)
                    if self.args.embed:
                        yield from [preds] if isinstance(preds, torch.Tensor) else preds  # yield embedding tensors
                        continue

                # Postprocess
                with profilers[2]:
                    self.results = self.postprocess(preds, im, im0s)
                self.run_callbacks("on_predict_postprocess_end")

                # Visualize, save, write results
                n = len(im0s)
                for i in range(n):
                    self.seen += 1
                    self.results[i].speed = {
                        "preprocess": profilers[0].dt * 1e3 / n,
                        "inference": profilers[1].dt * 1e3 / n,
                        "postprocess": profilers[2].dt * 1e3 / n,
                    }
                    if self.args.verbose or self.args.save or self.args.save_txt or self.args.show:
                        s[i] += self.write_results(i, Path(paths[i]), im, s)

                # Print batch results
                if self.args.verbose:
                    LOGGER.info("\n".join(s))

                self.run_callbacks("on_predict_batch_end")
                yield from self.results

        # Release assets
        for v in self.vid_writer.values():
            if isinstance(v, cv2.VideoWriter):
                v.release()

        # Print final results
        if self.args.verbose and self.seen:
            t = tuple(x.t / self.seen * 1e3 for x in profilers)  # speeds per image
            LOGGER.info(
                f"Speed: %.1fms preprocess, %.1fms inference, %.1fms postprocess per image at shape "
                f"{(min(self.args.batch, self.seen), 3, *im.shape[2:])}" % t
            )
        if self.args.save or self.args.save_txt or self.args.save_crop:
            nl = len(list(self.save_dir.glob("labels/*.txt")))  # number of labels
            s = f"\n{nl} label{'s' * (nl > 1)} saved to {self.save_dir / 'labels'}" if self.args.save_txt else ""
            LOGGER.info(f"Results saved to {colorstr('bold', self.save_dir)}{s}")
        self.run_callbacks("on_predict_end")

    def setup_model(self, model, verbose=True):
        """Initialize YOLO model with given parameters and set it to evaluation mode."""
        self.model = AutoBackend(
            weights=model or self.args.model,
            device=select_device(self.args.device, verbose=verbose),
            dnn=self.args.dnn,
            data=self.args.data,
            fp16=self.args.half,
            batch=self.args.batch,
            fuse=True,
            verbose=verbose,
        )

        self.device = self.model.device  # update device
        self.args.half = self.model.fp16  # update half
        self.model.eval()

    def write_results(self, i, p, im, s):
        """Write inference results to a file or directory."""
        string = ""  # print string
        if len(im.shape) == 3:
            im = im[None]  # expand for batch dim
        if self.source_type.stream or self.source_type.from_img or self.source_type.tensor:  # batch_size >= 1
            string += f"{i}: "
            frame = self.dataset.count
        else:
            match = re.search(r"frame (\d+)/", s[i])
            frame = int(match.group(1)) if match else None  # 0 if frame undetermined

        self.txt_path = self.save_dir / "labels" / (p.stem + ("" if self.dataset.mode == "image" else f"_{frame}"))
        string += "%gx%g " % im.shape[2:]
        result = self.results[i]
        result.save_dir = self.save_dir.__str__()  # used in other locations
        string += result.verbose() + f"{result.speed['inference']:.1f}ms"

        # Add predictions to image
        if self.args.save or self.args.show:
            self.plotted_img = result.plot(
                line_width=self.args.line_width,
                boxes=self.args.show_boxes,
                conf=self.args.show_conf,
                labels=self.args.show_labels,
                im_gpu=None if self.args.retina_masks else im[i],
            )

        # Save results
        if self.args.save_txt:
            result.save_txt(f"{self.txt_path}.txt", save_conf=self.args.save_conf)
        if self.args.save_crop:
            result.save_crop(save_dir=self.save_dir / "crops", file_name=self.txt_path.stem)
        if self.args.show:
            self.show(str(p))
        if self.args.save:
            self.save_predicted_images(str(self.save_dir / p.name), frame)

        return string

    def save_predicted_images(self, save_path="", frame=0):
        """Save video predictions as mp4 at specified path."""
        im = self.plotted_img

        # Save videos and streams
        if self.dataset.mode in {"stream", "video"}:
            fps = self.dataset.fps if self.dataset.mode == "video" else 30
            frames_path = f'{save_path.split(".", 1)[0]}_frames/'
            if save_path not in self.vid_writer:  # new video
                if self.args.save_frames:
                    Path(frames_path).mkdir(parents=True, exist_ok=True)
                suffix, fourcc = (".mp4", "avc1") if MACOS else (".avi", "WMV2") if WINDOWS else (".avi", "MJPG")
                self.vid_writer[save_path] = cv2.VideoWriter(
                    filename=str(Path(save_path).with_suffix(suffix)),
                    fourcc=cv2.VideoWriter_fourcc(*fourcc),
                    fps=fps,  # integer required, floats produce error in MP4 codec
                    frameSize=(im.shape[1], im.shape[0]),  # (width, height)
                )

            # Save video
            self.vid_writer[save_path].write(im)
            if self.args.save_frames:
                cv2.imwrite(f"{frames_path}{frame}.jpg", im)

        # Save images
        else:
            cv2.imwrite(save_path, im)

    def show(self, p=""):
        """Display an image in a window using OpenCV imshow()."""
        im = self.plotted_img
        if platform.system() == "Linux" and p not in self.windows:
            self.windows.append(p)
            cv2.namedWindow(p, cv2.WINDOW_NORMAL | cv2.WINDOW_KEEPRATIO)  # allow window resize (Linux)
            cv2.resizeWindow(p, im.shape[1], im.shape[0])  # (width, height)
        cv2.imshow(p, im)
        cv2.waitKey(300 if self.dataset.mode == "image" else 1)  # 1 millisecond

    def run_callbacks(self, event: str):
        """Runs all registered callbacks for a specific event."""
        for callback in self.callbacks.get(event, []):
            callback(self)

    def add_callback(self, event: str, func):
        """Add callback."""
        self.callbacks[event].append(func)

__call__(source=None, model=None, stream=False, *args, **kwargs)

Realiza una inferencia sobre una imagen o flujo.

C贸digo fuente en ultralytics/engine/predictor.py
def __call__(self, source=None, model=None, stream=False, *args, **kwargs):
    """Performs inference on an image or stream."""
    self.stream = stream
    if stream:
        return self.stream_inference(source, model, *args, **kwargs)
    else:
        return list(self.stream_inference(source, model, *args, **kwargs))  # merge list of Result into one

__init__(cfg=DEFAULT_CFG, overrides=None, _callbacks=None)

Inicializa la clase BasePredictor.

Par谩metros:

Nombre Tipo Descripci贸n Por defecto
cfg str

Ruta a un archivo de configuraci贸n. Por defecto es DEFAULT_CFG.

DEFAULT_CFG
overrides dict

Anula la configuraci贸n. Por defecto es Ninguno.

None
C贸digo fuente en ultralytics/engine/predictor.py
def __init__(self, cfg=DEFAULT_CFG, overrides=None, _callbacks=None):
    """
    Initializes the BasePredictor class.

    Args:
        cfg (str, optional): Path to a configuration file. Defaults to DEFAULT_CFG.
        overrides (dict, optional): Configuration overrides. Defaults to None.
    """
    self.args = get_cfg(cfg, overrides)
    self.save_dir = get_save_dir(self.args)
    if self.args.conf is None:
        self.args.conf = 0.25  # default conf=0.25
    self.done_warmup = False
    if self.args.show:
        self.args.show = check_imshow(warn=True)

    # Usable if setup is done
    self.model = None
    self.data = self.args.data  # data_dict
    self.imgsz = None
    self.device = None
    self.dataset = None
    self.vid_writer = {}  # dict of {save_path: video_writer, ...}
    self.plotted_img = None
    self.source_type = None
    self.seen = 0
    self.windows = []
    self.batch = None
    self.results = None
    self.transforms = None
    self.callbacks = _callbacks or callbacks.get_default_callbacks()
    self.txt_path = None
    self._lock = threading.Lock()  # for automatic thread-safe inference
    callbacks.add_integration_callbacks(self)

add_callback(event, func)

A帽ade una llamada de retorno.

C贸digo fuente en ultralytics/engine/predictor.py
def add_callback(self, event: str, func):
    """Add callback."""
    self.callbacks[event].append(func)

inference(im, *args, **kwargs)

Ejecuta la inferencia sobre una imagen dada utilizando el modelo y los argumentos especificados.

C贸digo fuente en ultralytics/engine/predictor.py
def inference(self, im, *args, **kwargs):
    """Runs inference on a given image using the specified model and arguments."""
    visualize = (
        increment_path(self.save_dir / Path(self.batch[0][0]).stem, mkdir=True)
        if self.args.visualize and (not self.source_type.tensor)
        else False
    )
    return self.model(im, augment=self.args.augment, visualize=visualize, embed=self.args.embed, *args, **kwargs)

postprocess(preds, img, orig_imgs)

Postprocesa las predicciones de una imagen y las devuelve.

C贸digo fuente en ultralytics/engine/predictor.py
def postprocess(self, preds, img, orig_imgs):
    """Post-processes predictions for an image and returns them."""
    return preds

pre_transform(im)

Pretransforma la imagen de entrada antes de la inferencia.

Par谩metros:

Nombre Tipo Descripci贸n Por defecto
im List(np.ndarray

(N, 3, h, w) para tensor, [(h, w, 3) x N] para lista.

necesario

Devuelve:

Tipo Descripci贸n
list

Una lista de im谩genes transformadas.

C贸digo fuente en ultralytics/engine/predictor.py
def pre_transform(self, im):
    """
    Pre-transform input image before inference.

    Args:
        im (List(np.ndarray)): (N, 3, h, w) for tensor, [(h, w, 3) x N] for list.

    Returns:
        (list): A list of transformed images.
    """
    same_shapes = len({x.shape for x in im}) == 1
    letterbox = LetterBox(self.imgsz, auto=same_shapes and self.model.pt, stride=self.model.stride)
    return [letterbox(image=x) for x in im]

predict_cli(source=None, model=None)

M茅todo utilizado para la predicci贸n CLI .

Utiliza siempre generador como salidas, ya que no lo requiere el modo CLI .

C贸digo fuente en ultralytics/engine/predictor.py
def predict_cli(self, source=None, model=None):
    """
    Method used for CLI prediction.

    It uses always generator as outputs as not required by CLI mode.
    """
    gen = self.stream_inference(source, model)
    for _ in gen:  # noqa, running CLI inference without accumulating any outputs (do not modify)
        pass

preprocess(im)

Prepara la imagen de entrada antes de la inferencia.

Par谩metros:

Nombre Tipo Descripci贸n Por defecto
im torch.Tensor | List(np.ndarray

BCHW para tensor, [(HWC) x B] para lista.

necesario
C贸digo fuente en ultralytics/engine/predictor.py
def preprocess(self, im):
    """
    Prepares input image before inference.

    Args:
        im (torch.Tensor | List(np.ndarray)): BCHW for tensor, [(HWC) x B] for list.
    """
    not_tensor = not isinstance(im, torch.Tensor)
    if not_tensor:
        im = np.stack(self.pre_transform(im))
        im = im[..., ::-1].transpose((0, 3, 1, 2))  # BGR to RGB, BHWC to BCHW, (n, 3, h, w)
        im = np.ascontiguousarray(im)  # contiguous
        im = torch.from_numpy(im)

    im = im.to(self.device)
    im = im.half() if self.model.fp16 else im.float()  # uint8 to fp16/32
    if not_tensor:
        im /= 255  # 0 - 255 to 0.0 - 1.0
    return im

run_callbacks(event)

Ejecuta todas las llamadas de retorno registradas para un evento concreto.

C贸digo fuente en ultralytics/engine/predictor.py
def run_callbacks(self, event: str):
    """Runs all registered callbacks for a specific event."""
    for callback in self.callbacks.get(event, []):
        callback(self)

save_predicted_images(save_path='', frame=0)

Guarda las predicciones de v铆deo como mp4 en la ruta especificada.

C贸digo fuente en ultralytics/engine/predictor.py
def save_predicted_images(self, save_path="", frame=0):
    """Save video predictions as mp4 at specified path."""
    im = self.plotted_img

    # Save videos and streams
    if self.dataset.mode in {"stream", "video"}:
        fps = self.dataset.fps if self.dataset.mode == "video" else 30
        frames_path = f'{save_path.split(".", 1)[0]}_frames/'
        if save_path not in self.vid_writer:  # new video
            if self.args.save_frames:
                Path(frames_path).mkdir(parents=True, exist_ok=True)
            suffix, fourcc = (".mp4", "avc1") if MACOS else (".avi", "WMV2") if WINDOWS else (".avi", "MJPG")
            self.vid_writer[save_path] = cv2.VideoWriter(
                filename=str(Path(save_path).with_suffix(suffix)),
                fourcc=cv2.VideoWriter_fourcc(*fourcc),
                fps=fps,  # integer required, floats produce error in MP4 codec
                frameSize=(im.shape[1], im.shape[0]),  # (width, height)
            )

        # Save video
        self.vid_writer[save_path].write(im)
        if self.args.save_frames:
            cv2.imwrite(f"{frames_path}{frame}.jpg", im)

    # Save images
    else:
        cv2.imwrite(save_path, im)

setup_model(model, verbose=True)

Inicializa el modelo YOLO con los par谩metros dados y ponlo en modo evaluaci贸n.

C贸digo fuente en ultralytics/engine/predictor.py
def setup_model(self, model, verbose=True):
    """Initialize YOLO model with given parameters and set it to evaluation mode."""
    self.model = AutoBackend(
        weights=model or self.args.model,
        device=select_device(self.args.device, verbose=verbose),
        dnn=self.args.dnn,
        data=self.args.data,
        fp16=self.args.half,
        batch=self.args.batch,
        fuse=True,
        verbose=verbose,
    )

    self.device = self.model.device  # update device
    self.args.half = self.model.fp16  # update half
    self.model.eval()

setup_source(source)

Configura la fuente y el modo de inferencia.

C贸digo fuente en ultralytics/engine/predictor.py
def setup_source(self, source):
    """Sets up source and inference mode."""
    self.imgsz = check_imgsz(self.args.imgsz, stride=self.model.stride, min_dim=2)  # check image size
    self.transforms = (
        getattr(
            self.model.model,
            "transforms",
            classify_transforms(self.imgsz[0], crop_fraction=self.args.crop_fraction),
        )
        if self.args.task == "classify"
        else None
    )
    self.dataset = load_inference_source(
        source=source,
        batch=self.args.batch,
        vid_stride=self.args.vid_stride,
        buffer=self.args.stream_buffer,
    )
    self.source_type = self.dataset.source_type
    if not getattr(self, "stream", True) and (
        self.source_type.stream
        or self.source_type.screenshot
        or len(self.dataset) > 1000  # many images
        or any(getattr(self.dataset, "video_flag", [False]))
    ):  # videos
        LOGGER.warning(STREAM_WARNING)
    self.vid_writer = {}

show(p='')

Muestra una imagen en una ventana utilizando imshow() de OpenCV.

C贸digo fuente en ultralytics/engine/predictor.py
def show(self, p=""):
    """Display an image in a window using OpenCV imshow()."""
    im = self.plotted_img
    if platform.system() == "Linux" and p not in self.windows:
        self.windows.append(p)
        cv2.namedWindow(p, cv2.WINDOW_NORMAL | cv2.WINDOW_KEEPRATIO)  # allow window resize (Linux)
        cv2.resizeWindow(p, im.shape[1], im.shape[0])  # (width, height)
    cv2.imshow(p, im)
    cv2.waitKey(300 if self.dataset.mode == "image" else 1)  # 1 millisecond

stream_inference(source=None, model=None, *args, **kwargs)

Transmite inferencia en tiempo real sobre la alimentaci贸n de la c谩mara y guarda los resultados en un archivo.

C贸digo fuente en ultralytics/engine/predictor.py
@smart_inference_mode()
def stream_inference(self, source=None, model=None, *args, **kwargs):
    """Streams real-time inference on camera feed and saves results to file."""
    if self.args.verbose:
        LOGGER.info("")

    # Setup model
    if not self.model:
        self.setup_model(model)

    with self._lock:  # for thread-safe inference
        # Setup source every time predict is called
        self.setup_source(source if source is not None else self.args.source)

        # Check if save_dir/ label file exists
        if self.args.save or self.args.save_txt:
            (self.save_dir / "labels" if self.args.save_txt else self.save_dir).mkdir(parents=True, exist_ok=True)

        # Warmup model
        if not self.done_warmup:
            self.model.warmup(imgsz=(1 if self.model.pt or self.model.triton else self.dataset.bs, 3, *self.imgsz))
            self.done_warmup = True

        self.seen, self.windows, self.batch = 0, [], None
        profilers = (
            ops.Profile(device=self.device),
            ops.Profile(device=self.device),
            ops.Profile(device=self.device),
        )
        self.run_callbacks("on_predict_start")
        for self.batch in self.dataset:
            self.run_callbacks("on_predict_batch_start")
            paths, im0s, s = self.batch

            # Preprocess
            with profilers[0]:
                im = self.preprocess(im0s)

            # Inference
            with profilers[1]:
                preds = self.inference(im, *args, **kwargs)
                if self.args.embed:
                    yield from [preds] if isinstance(preds, torch.Tensor) else preds  # yield embedding tensors
                    continue

            # Postprocess
            with profilers[2]:
                self.results = self.postprocess(preds, im, im0s)
            self.run_callbacks("on_predict_postprocess_end")

            # Visualize, save, write results
            n = len(im0s)
            for i in range(n):
                self.seen += 1
                self.results[i].speed = {
                    "preprocess": profilers[0].dt * 1e3 / n,
                    "inference": profilers[1].dt * 1e3 / n,
                    "postprocess": profilers[2].dt * 1e3 / n,
                }
                if self.args.verbose or self.args.save or self.args.save_txt or self.args.show:
                    s[i] += self.write_results(i, Path(paths[i]), im, s)

            # Print batch results
            if self.args.verbose:
                LOGGER.info("\n".join(s))

            self.run_callbacks("on_predict_batch_end")
            yield from self.results

    # Release assets
    for v in self.vid_writer.values():
        if isinstance(v, cv2.VideoWriter):
            v.release()

    # Print final results
    if self.args.verbose and self.seen:
        t = tuple(x.t / self.seen * 1e3 for x in profilers)  # speeds per image
        LOGGER.info(
            f"Speed: %.1fms preprocess, %.1fms inference, %.1fms postprocess per image at shape "
            f"{(min(self.args.batch, self.seen), 3, *im.shape[2:])}" % t
        )
    if self.args.save or self.args.save_txt or self.args.save_crop:
        nl = len(list(self.save_dir.glob("labels/*.txt")))  # number of labels
        s = f"\n{nl} label{'s' * (nl > 1)} saved to {self.save_dir / 'labels'}" if self.args.save_txt else ""
        LOGGER.info(f"Results saved to {colorstr('bold', self.save_dir)}{s}")
    self.run_callbacks("on_predict_end")

write_results(i, p, im, s)

Escribe los resultados de la inferencia en un archivo o directorio.

C贸digo fuente en ultralytics/engine/predictor.py
def write_results(self, i, p, im, s):
    """Write inference results to a file or directory."""
    string = ""  # print string
    if len(im.shape) == 3:
        im = im[None]  # expand for batch dim
    if self.source_type.stream or self.source_type.from_img or self.source_type.tensor:  # batch_size >= 1
        string += f"{i}: "
        frame = self.dataset.count
    else:
        match = re.search(r"frame (\d+)/", s[i])
        frame = int(match.group(1)) if match else None  # 0 if frame undetermined

    self.txt_path = self.save_dir / "labels" / (p.stem + ("" if self.dataset.mode == "image" else f"_{frame}"))
    string += "%gx%g " % im.shape[2:]
    result = self.results[i]
    result.save_dir = self.save_dir.__str__()  # used in other locations
    string += result.verbose() + f"{result.speed['inference']:.1f}ms"

    # Add predictions to image
    if self.args.save or self.args.show:
        self.plotted_img = result.plot(
            line_width=self.args.line_width,
            boxes=self.args.show_boxes,
            conf=self.args.show_conf,
            labels=self.args.show_labels,
            im_gpu=None if self.args.retina_masks else im[i],
        )

    # Save results
    if self.args.save_txt:
        result.save_txt(f"{self.txt_path}.txt", save_conf=self.args.save_conf)
    if self.args.save_crop:
        result.save_crop(save_dir=self.save_dir / "crops", file_name=self.txt_path.stem)
    if self.args.show:
        self.show(str(p))
    if self.args.save:
        self.save_predicted_images(str(self.save_dir / p.name), frame)

    return string





Creado 2023-11-12, Actualizado 2024-05-18
Autores: glenn-jocher (4), Burhan-Q (1)