app.py

import gradio as gr

import argparse
import time
from pathlib import Path

import torch
import torch.backends.cudnn as cudnn
from numpy import random

from models.experimental import attempt_load
from utils.datasets import LoadStreams, LoadImages
from utils.general import (
    check_img_size,
    non_max_suppression,
    apply_classifier,
    scale_coords,
    xyxy2xywh,
    set_logging,
    increment_path,
)
from utils.plots import plot_one_box
from utils.torch_utils import (
    select_device,
    load_classifier,
    TracedModel,
)
from PIL import Image

from huggingface_hub import hf_hub_download


def load_model(model_name):
    model_path = hf_hub_download(
        repo_id=f"Yolov7/{model_name}", filename=f"{model_name}.pt"
    )

    return model_path


loaded_model = load_model("yolov7")


def detect(img):
    parser = argparse.ArgumentParser()
    parser.add_argument(
        "--weights", nargs="+", type=str, default=loaded_model, help="model.pt path(s)"
    )
    parser.add_argument("--source", type=str, default="Inference/", help="source")
    parser.add_argument(
        "--img-size", type=int, default=640, help="inference size (pixels)"
    )
    parser.add_argument(
        "--conf-thres", type=float, default=0.25, help="object confidence threshold"
    )
    parser.add_argument(
        "--iou-thres", type=float, default=0.45, help="IOU threshold for NMS"
    )
    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="display results")
    parser.add_argument("--save-txt", action="store_true", help="save results to *.txt")
    parser.add_argument(
        "--save-conf", action="store_true", help="save confidences in --save-txt labels"
    )
    parser.add_argument(
        "--nosave", action="store_true", help="do not save images/videos"
    )
    parser.add_argument(
        "--classes",
        nargs="+",
        type=int,
        help="filter by class: --class 0, or --class 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("--update", action="store_true", help="update all models")
    parser.add_argument(
        "--project", default="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("--trace", action="store_true", help="trace model")
    opt = parser.parse_args()
    img.save("Inference/test.jpg")
    source, weights, view_img, save_txt, imgsz, trace = (
        opt.source,
        opt.weights,
        opt.view_img,
        opt.save_txt,
        opt.img_size,
        opt.trace,
    )
    save_img = True  # save inference images

    # Directories
    save_dir = Path(
        increment_path(Path(opt.project) / opt.name, exist_ok=opt.exist_ok)
    )  # increment run
    (save_dir / "labels" if save_txt else save_dir).mkdir(
        parents=True, exist_ok=True
    )  # make dir

    # Initialize
    set_logging()
    device = select_device(opt.device)
    half = device.type != "cpu"  # half precision only supported on CUDA

    # Load model
    model = attempt_load(weights, map_location=device)  # load FP32 model
    stride = int(model.stride.max())  # model stride
    imgsz = check_img_size(imgsz, s=stride)  # check img_size

    if trace:
        model = TracedModel(model, device, opt.img_size)

    if half:
        model.half()  # to FP16

    # Second-stage classifier
    classify = False
    if classify:
        modelc = load_classifier(name="resnet101", n=2)  # initialize
        modelc.load_state_dict(
            torch.load("weights/resnet101.pt", map_location=device)["model"]
        ).to(device).eval()

    # Set Dataloader
    dataset = LoadImages(source, img_size=imgsz, stride=stride)

    # Get names and colors
    names = model.module.names if hasattr(model, "module") else model.names
    colors = [[random.randint(0, 255) for _ in range(3)] for _ in names]

    # Run inference
    if device.type != "cpu":
        model(
            torch.zeros(1, 3, imgsz, imgsz).to(device).type_as(next(model.parameters()))
        )  # run once
    t0 = time.time()
    for path, img, im0s, vid_cap in dataset:
        img = torch.from_numpy(img).to(device)
        img = img.half() if half else img.float()  # uint8 to fp16/32
        img /= 255.0  # 0 - 255 to 0.0 - 1.0
        if img.ndimension() == 3:
            img = img.unsqueeze(0)

        # Inference
        pred = model(img, augment=opt.augment)[0]

        # Apply NMS
        pred = non_max_suppression(
            pred,
            opt.conf_thres,
            opt.iou_thres,
            classes=opt.classes,
            agnostic=opt.agnostic_nms,
        )

        # Apply Classifier
        if classify:
            pred = apply_classifier(pred, modelc, img, im0s)

        # Process detections
        for i, det in enumerate(pred):  # detections per image
            p, s, im0, frame = path, "", im0s, getattr(dataset, "frame", 0)

            p = Path(p)  # to Path
            txt_path = str(save_dir / "labels" / p.stem) + (
                "" if dataset.mode == "image" else f"_{frame}"
            )  # img.txt
            gn = torch.tensor(im0.shape)[[1, 0, 1, 0]]  # normalization gain whwh
            if len(det):
                # Rescale boxes from img_size to im0 size
                det[:, :4] = scale_coords(img.shape[2:], det[:, :4], im0.shape).round()

                # Print results
                for c in det[:, -1].unique():
                    n = (det[:, -1] == c).sum()  # detections per class
                    s += f"{n} {names[int(c)]}{'s' * (n > 1)} "  # add to string

                # Write results
                for *xyxy, conf, cls in reversed(det):
                    if save_txt:  # Write to file
                        xywh = (
                            (xyxy2xywh(torch.tensor(xyxy).view(1, 4)) / gn)
                            .view(-1)
                            .tolist()
                        )  # normalized xywh
                        line = (
                            (cls, *xywh, conf) if opt.save_conf else (cls, *xywh)
                        )  # label format
                        with open(txt_path + ".txt", "a") as f:
                            f.write(("%g " * len(line)).rstrip() % line + "\n")

                    if save_img or view_img:  # Add bbox to image
                        label = f"{names[int(cls)]} {conf:.2f}"
                        plot_one_box(
                            xyxy,
                            im0,
                            label=label,
                            color=colors[int(cls)],
                            line_thickness=3,
                        )

    print(f"Done. ({time.time() - t0:.3f}s)")

    return [Image.fromarray(im0[:, :, ::-1]), s]


css_code = ".border{border-width: 0;}.gr-button-primary{--tw-gradient-stops: rgb(11 143 235 / 70%), rgb(192 53 208 / 80%);color:black;border-color:black;}.gr-button-secondary{color:black;border-color:black;--tw-gradient-stops: white;}.gr-panel{background-color: white;}.gr-text-input{border-width: 0;padding: 0;text-align: center;margin-left: -8px;font-size: 28px;color: black;margin-top: -12px;}.font-semibold,.shadow-sm,.h-5,.text-xl,.text-xs{display:none;}.gr-box{box-shadow:none;border-radius:0;}.object-contain{background-color: white;}.gr-prose h1{font-family: Helvetica; font-weight: 400 !important;}"
gr.Interface(
    fn=detect,
    title="Anything Counter",
    inputs=gr.Image(type="pil"),
    outputs=[gr.Image(label="detection", type="pil"), gr.Textbox(label="")],
    css=css_code,
    allow_flagging="never",
    examples=[
        ["Examples/apples.jpeg"],
        ["Examples/birds.jpeg"],
        ["Examples/bottles.jpeg"],
    ],
).launch(debug=True)