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Update app.py
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app.py
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import cv2
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import gradio as gr
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from ultralytics import YOLO
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# ── Config ─────────────────────────────────────────────
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MODEL_PATH = "yolov8n.pt" # modelo pre-entrenado (COCO, clase “person”)
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CONF_THRES = 0.3 # confianza mínima
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LINE_RATIO = 0.5 # línea virtual en mitad de la altura
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# ───────────────────────────────────────────────────────
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model = YOLO(MODEL_PATH)
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# Estado global para entradas/salidas
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memory = {} # {track_id: previous_cy}
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in_count = 0
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out_count = 0
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def count_people(frame):
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global memory, in_count, out_count
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h, w = frame.shape[:2]
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line_y = int(h * LINE_RATIO)
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# detección + tracking interno (ByteTrack)
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results = model.track(
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frame,
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classes=[0], # solo “person”
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conf=CONF_THRES,
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persist=True,
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verbose=False
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)
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annotated = frame.copy()
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cv2.line(annotated, (0, line_y), (w, line_y), (0, 255, 255), 2)
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if results:
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for box in results[0].boxes:
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x1, y1, x2, y2 = map(int, box.xyxy[0])
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cx, cy = int((x1 + x2) / 2), int((y1 + y2) / 2)
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tid = int(box.id[0]) if box.id is not None else -1
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# lógica de cruce
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prev_cy = memory.get(tid, cy)
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if prev_cy < line_y <= cy: # entra
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in_count += 1
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elif prev_cy > line_y >= cy: # sale
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out_count += 1
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memory[tid] = cy
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# dibujo
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cv2.rectangle(annotated, (x1, y1), (x2, y2), (0, 255, 0), 1)
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cv2.circle(annotated, (cx, cy), 3, (0, 0, 255), -1)
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cv2.putText(annotated, str(tid), (x1, y1 - 5),
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cv2.FONT_HERSHEY_SIMPLEX, 0.5, (255, 0, 0), 1)
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total = in_count - out_count
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cv2.putText(
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annotated,
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f"In: {in_count} Out: {out_count} Ocupación: {total}",
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(10, 30),
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cv2.FONT_HERSHEY_SIMPLEX,
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1,
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(255, 255, 255),
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2
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)
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return annotated, f"In: {in_count} | Out: {out_count} | Ocupación: {total}"
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demo = gr.Interface(
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fn=count_people,
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inputs=gr.Image(sources=["webcam"], streaming=True), # 👈 parámetro correcto
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outputs=[gr.Image(label="Video"), gr.Text(label="Contador")],
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live=True,
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title="Contador de personas (entrada única)"
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)
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if __name__ == "__main__":
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demo.launch()
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