yolov5/detect.py

# YOLOv5 🚀 by Ultralytics, AGPL-3.0 license
"""
Run YOLOv5 detection inference on images, videos, directories, globs, YouTube, webcam, streams, etc.

Usage - sources:
    $ python detect.py --weights yolov5s.pt --source 0                               # webcam
                                                     img.jpg                         # image
                                                     vid.mp4                         # video
                                                     screen                          # screenshot
                                                     path/                           # directory
                                                     list.txt                        # list of images
                                                     list.streams                    # list of streams
                                                     'path/*.jpg'                    # glob
                                                     'https://youtu.be/LNwODJXcvt4'  # YouTube
                                                     'rtsp://example.com/media.mp4'  # RTSP, RTMP, HTTP stream

Usage - formats:
    $ python detect.py --weights yolov5s.pt                 # PyTorch
                                 yolov5s.torchscript        # TorchScript
                                 yolov5s.onnx               # ONNX Runtime or OpenCV DNN with --dnn
                                 yolov5s_openvino_model     # OpenVINO
                                 yolov5s.engine             # TensorRT
                                 yolov5s.mlmodel            # CoreML (macOS-only)
                                 yolov5s_saved_model        # TensorFlow SavedModel
                                 yolov5s.pb                 # TensorFlow GraphDef
                                 yolov5s.tflite             # TensorFlow Lite
                                 yolov5s_edgetpu.tflite     # TensorFlow Edge TPU
                                 yolov5s_paddle_model       # PaddlePaddle
"""

import argparse
import csv
import os
import platform
import sys
from pathlib import Path

import torch
from gtts import gTTS


def detect(opt):
    source, weights, conf, save_txt_path = opt.source, opt.weights, opt.conf, opt.save_txt_path

    model = torch.hub.load("ultralytics/yolov5", "custom", path=weights)

    results = model(source)

    results_df = results.pandas().xyxy[0]

    classes = results_df["name"].tolist()

    with open(save_txt_path, "w") as f:
        for cls in classes:
            f.write(f"{cls}\n")

    print("Detected Classes:")
    for cls in classes:
        print(cls)

    if classes:
        text_to_speak = "Detected classes are: " + ", ".join(classes)
        tts = gTTS(text=text_to_speak, lang="en")
        tts.save("detected_classes.mp3")
        os.system("mpg321 detected_classes.mp3") 


if __name__ == "__main__":
    parser = argparse.ArgumentParser()
    parser.add_argument(
        "--weights", type=str, default="./runs/train/HongRyeon_yolov5s_results/weights/best.pt", help="model.pt path"
    )
    parser.add_argument(
        "--source", type=str, default="/HongRyeon_test01.jpg", help="source"
    )  
    parser.add_argument("--conf", type=float, default=0.5, help="object confidence threshold")
    parser.add_argument(
        "--save_txt_path", type=str, default="detected_classes.txt", help="path to save detected classes txt file"
    )
    opt = parser.parse_args()

    with torch.no_grad():
        detect(opt)


FILE = Path(__file__).resolve()
ROOT = FILE.parents[0]  
if str(ROOT) not in sys.path:
    sys.path.append(str(ROOT))  
ROOT = Path(os.path.relpath(ROOT, Path.cwd()))  

from ultralytics.utils.plotting import Annotator, colors, save_one_box

from models.common import DetectMultiBackend
from utils.dataloaders import IMG_FORMATS, VID_FORMATS, LoadImages, LoadScreenshots, LoadStreams
from utils.general import (
    LOGGER,
    Profile,
    check_file,
    check_img_size,
    check_imshow,
    check_requirements,
    colorstr,
    cv2,
    increment_path,
    non_max_suppression,
    print_args,
    scale_boxes,
    strip_optimizer,
    xyxy2xywh,
)
from utils.torch_utils import select_device, smart_inference_mode


@smart_inference_mode()
def run(
    weights=ROOT / "yolov5s.pt", 
    source=ROOT / "data/images",  
    data=ROOT / "data/coco128.yaml", 
    imgsz=(640, 640), 
    conf_thres=0.25,  
    iou_thres=0.45, 
    max_det=1000, 
    device="",  
    view_img=False, 
    save_txt=False, 
    save_csv=False,  
    save_conf=False, 
    save_crop=False,  
    nosave=False,  
    classes=None,  
    agnostic_nms=False, 
    augment=False, 
    visualize=False,  
    update=False, 
    project=ROOT / "runs/detect",  
    name="exp",  
    exist_ok=False, 
    line_thickness=3,  
    hide_labels=False,  
    hide_conf=False,  
    half=False, 
    dnn=False,  
    vid_stride=1,  
):
    source = str(source)
    save_img = not nosave and not source.endswith(".txt")  
    is_file = Path(source).suffix[1:] in (IMG_FORMATS + VID_FORMATS)
    is_url = source.lower().startswith(("rtsp://", "rtmp://", "http://", "https://"))
    webcam = source.isnumeric() or source.endswith(".streams") or (is_url and not is_file)
    screenshot = source.lower().startswith("screen")
    if is_url and is_file:
        source = check_file(source) 

  
    save_dir = increment_path(Path(project) / name, exist_ok=exist_ok)  
    (save_dir / "labels" if save_txt else save_dir).mkdir(parents=True, exist_ok=True)  


    device = select_device(device)
    model = DetectMultiBackend(weights, device=device, dnn=dnn, data=data, fp16=half)
    stride, names, pt = model.stride, model.names, model.pt
    imgsz = check_img_size(imgsz, s=stride)  

  
    bs = 1  
    if webcam:
        view_img = check_imshow(warn=True)
        dataset = LoadStreams(source, img_size=imgsz, stride=stride, auto=pt, vid_stride=vid_stride)
        bs = len(dataset)
    elif screenshot:
        dataset = LoadScreenshots(source, img_size=imgsz, stride=stride, auto=pt)
    else:
        dataset = LoadImages(source, img_size=imgsz, stride=stride, auto=pt, vid_stride=vid_stride)
    vid_path, vid_writer = [None] * bs, [None] * bs


    model.warmup(imgsz=(1 if pt or model.triton else bs, 3, *imgsz))  
    seen, windows, dt = 0, [], (Profile(device=device), Profile(device=device), Profile(device=device))
    for path, im, im0s, vid_cap, s in dataset:
        with dt[0]:
            im = torch.from_numpy(im).to(model.device)
            im = im.half() if model.fp16 else im.float()  
            im /= 255  
            if len(im.shape) == 3:
                im = im[None]  
            if model.xml and im.shape[0] > 1:
                ims = torch.chunk(im, im.shape[0], 0)


        with dt[1]:
            visualize = increment_path(save_dir / Path(path).stem, mkdir=True) if visualize else False
            if model.xml and im.shape[0] > 1:
                pred = None
                for image in ims:
                    if pred is None:
                        pred = model(image, augment=augment, visualize=visualize).unsqueeze(0)
                    else:
                        pred = torch.cat((pred, model(image, augment=augment, visualize=visualize).unsqueeze(0)), dim=0)
                pred = [pred, None]
            else:
                pred = model(im, augment=augment, visualize=visualize)
 
        with dt[2]:
            pred = non_max_suppression(pred, conf_thres, iou_thres, classes, agnostic_nms, max_det=max_det)


        csv_path = save_dir / "predictions.csv"

        def write_to_csv(image_name, prediction, confidence):
            """Writes prediction data for an image to a CSV file, appending if the file exists."""
            data = {"Image Name": image_name, "Prediction": prediction, "Confidence": confidence}
            with open(csv_path, mode="a", newline="") as f:
                writer = csv.DictWriter(f, fieldnames=data.keys())
                if not csv_path.is_file():
                    writer.writeheader()
                writer.writerow(data)

        for i, det in enumerate(pred):  
            seen += 1
            if webcam:  
                p, im0, frame = path[i], im0s[i].copy(), dataset.count
                s += f"{i}: "
            else:
                p, im0, frame = path, im0s.copy(), getattr(dataset, "frame", 0)

            p = Path(p)  
            save_path = str(save_dir / p.name) 
            txt_path = str(save_dir / "labels" / p.stem) + ("" if dataset.mode == "image" else f"_{frame}")  
            s += "%gx%g " % im.shape[2:] 
            gn = torch.tensor(im0.shape)[[1, 0, 1, 0]]  
            imc = im0.copy() if save_crop else im0 
            annotator = Annotator(im0, line_width=line_thickness, example=str(names))
            if len(det):

                det[:, :4] = scale_boxes(im.shape[2:], det[:, :4], im0.shape).round()

         
                for c in det[:, 5].unique():
                    n = (det[:, 5] == c).sum()  
                    s += f"{n} {names[int(c)]}{'s' * (n > 1)}, " 

            
                for *xyxy, conf, cls in reversed(det):
                    c = int(cls)  
                    label = names[c] if hide_conf else f"{names[c]}"
                    confidence = float(conf)
                    confidence_str = f"{confidence:.2f}"

                    if save_csv:
                        write_to_csv(p.name, label, confidence_str)

                    if save_txt:  
                        xywh = (xyxy2xywh(torch.tensor(xyxy).view(1, 4)) / gn).view(-1).tolist()  
                        line = (cls, *xywh, conf) if save_conf else (cls, *xywh)  
                        with open(f"{txt_path}.txt", "a") as f:
                            f.write(("%g " * len(line)).rstrip() % line + "\n")

                    if save_img or save_crop or view_img: 
                        c = int(cls)  
                        label = None if hide_labels else (names[c] if hide_conf else f"{names[c]} {conf:.2f}")
                        annotator.box_label(xyxy, label, color=colors(c, True))
                    if save_crop:
                        save_one_box(xyxy, imc, file=save_dir / "crops" / names[c] / f"{p.stem}.jpg", BGR=True)


            im0 = annotator.result()
            if view_img:
                if platform.system() == "Linux" and p not in windows:
                    windows.append(p)
                    cv2.namedWindow(str(p), cv2.WINDOW_NORMAL | cv2.WINDOW_KEEPRATIO) 
                    cv2.resizeWindow(str(p), im0.shape[1], im0.shape[0])
                cv2.imshow(str(p), im0)
                cv2.waitKey(1)  

            if save_img:
                if dataset.mode == "image":
                    cv2.imwrite(save_path, im0)
                else:  
                    if vid_path[i] != save_path:  
                        vid_path[i] = save_path
                        if isinstance(vid_writer[i], cv2.VideoWriter):
                            vid_writer[i].release()  
                        if vid_cap: 
                            fps = vid_cap.get(cv2.CAP_PROP_FPS)
                            w = int(vid_cap.get(cv2.CAP_PROP_FRAME_WIDTH))
                            h = int(vid_cap.get(cv2.CAP_PROP_FRAME_HEIGHT))
                        else: 
                            fps, w, h = 30, im0.shape[1], im0.shape[0]
                        save_path = str(Path(save_path).with_suffix(".mp4"))  
                        vid_writer[i] = cv2.VideoWriter(save_path, cv2.VideoWriter_fourcc(*"mp4v"), fps, (w, h))
                    vid_writer[i].write(im0)

        LOGGER.info(f"{s}{'' if len(det) else '(no detections), '}{dt[1].dt * 1E3:.1f}ms")

    t = tuple(x.t / seen * 1e3 for x in dt)
    LOGGER.info(f"Speed: %.1fms pre-process, %.1fms inference, %.1fms NMS per image at shape {(1, 3, *imgsz)}" % t)
    if save_txt or save_img:
        s = f"\n{len(list(save_dir.glob('labels/*.txt')))} labels saved to {save_dir / 'labels'}" if save_txt else ""
        LOGGER.info(f"Results saved to {colorstr('bold', save_dir)}{s}")
    if update:
        strip_optimizer(weights[0])  


def parse_opt():
    """Parses command-line arguments for YOLOv5 detection, setting inference options and model configurations."""
    parser = argparse.ArgumentParser()
    parser.add_argument("--weights", nargs="+", type=str, default=ROOT / "yolov5s.pt", help="model path or triton URL")
    parser.add_argument("--source", type=str, default=ROOT / "data/images", help="file/dir/URL/glob/screen/0(webcam)")
    parser.add_argument("--data", type=str, default=ROOT / "data/coco128.yaml", help="(optional) dataset.yaml path")
    parser.add_argument("--imgsz", "--img", "--img-size", nargs="+", type=int, default=[640], help="inference size h,w")
    parser.add_argument("--conf-thres", type=float, default=0.25, help="confidence threshold")
    parser.add_argument("--iou-thres", type=float, default=0.45, help="NMS IoU threshold")
    parser.add_argument("--max-det", type=int, default=1000, help="maximum detections per image")
    parser.add_argument("--device", default="", help="cuda device, i.e. 0 or 0,1,2,3 or cpu")
    parser.add_argument("--view-img", action="store_true", help="show results")
    parser.add_argument("--save-txt", action="store_true", help="save results to *.txt")
    parser.add_argument("--save-csv", action="store_true", help="save results in CSV format")
    parser.add_argument("--save-conf", action="store_true", help="save confidences in --save-txt labels")
    parser.add_argument("--save-crop", action="store_true", help="save cropped prediction boxes")
    parser.add_argument("--nosave", action="store_true", help="do not save images/videos")
    parser.add_argument("--classes", nargs="+", type=int, help="filter by class: --classes 0, or --classes 0 2 3")
    parser.add_argument("--agnostic-nms", action="store_true", help="class-agnostic NMS")
    parser.add_argument("--augment", action="store_true", help="augmented inference")
    parser.add_argument("--visualize", action="store_true", help="visualize features")
    parser.add_argument("--update", action="store_true", help="update all models")
    parser.add_argument("--project", default=ROOT / "runs/detect", help="save results to project/name")
    parser.add_argument("--name", default="exp", help="save results to project/name")
    parser.add_argument("--exist-ok", action="store_true", help="existing project/name ok, do not increment")
    parser.add_argument("--line-thickness", default=3, type=int, help="bounding box thickness (pixels)")
    parser.add_argument("--hide-labels", default=False, action="store_true", help="hide labels")
    parser.add_argument("--hide-conf", default=False, action="store_true", help="hide confidences")
    parser.add_argument("--half", action="store_true", help="use FP16 half-precision inference")
    parser.add_argument("--dnn", action="store_true", help="use OpenCV DNN for ONNX inference")
    parser.add_argument("--vid-stride", type=int, default=1, help="video frame-rate stride")
    opt = parser.parse_args()
    opt.imgsz *= 2 if len(opt.imgsz) == 1 else 1  
    print_args(vars(opt))
    return opt


def main(opt):
    """Executes YOLOv5 model inference with given options, checking requirements before running the model."""
    check_requirements(ROOT / "requirements.txt", exclude=("tensorboard", "thop"))
    run(**vars(opt))


if __name__ == "__main__":
    opt = parse_opt()
    main(opt)