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app.py
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import cv2
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import mediapipe as mp
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import numpy as np
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import gradio as gr
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import tempfile
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# Load model
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MODEL_PATH = "hand_landmarker.task"
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BaseOptions = mp.tasks.BaseOptions
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HandLandmarker = mp.tasks.vision.HandLandmarker
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HandLandmarkerOptions = mp.tasks.vision.HandLandmarkerOptions
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VisionRunningMode = mp.tasks.vision.RunningMode
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mp_image = mp.Image
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mp_format = mp.ImageFormat
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# Finger connections and colors
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HAND_CONNECTIONS = [
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(0, 1), (1, 2), (2, 3), (3, 4),
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(0, 5), (5, 6), (6, 7), (7, 8),
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(0, 9), (9,10), (10,11), (11,12),
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(0,13), (13,14), (14,15), (15,16),
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(0,17), (17,18), (18,19), (19,20)
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]
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FINGER_COLORS = {
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'thumb': (245, 245, 245),
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'index': (128, 0, 128),
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'middle': (0, 255, 0),
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'ring': (0, 165, 255),
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'pinky': (255, 0, 0),
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'palm': (100, 100, 100)
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}
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def get_finger_color(start_idx):
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if start_idx in range(0, 5):
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return FINGER_COLORS['thumb']
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elif start_idx in range(5, 9):
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return FINGER_COLORS['index']
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elif start_idx in range(9, 13):
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return FINGER_COLORS['middle']
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elif start_idx in range(13, 17):
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return FINGER_COLORS['ring']
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elif start_idx in range(17, 21):
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return FINGER_COLORS['pinky']
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else:
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return FINGER_COLORS['palm']
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def process_video(video_path):
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cap = cv2.VideoCapture(video_path)
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fourcc = cv2.VideoWriter_fourcc(*'mp4v')
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tmp_out = tempfile.NamedTemporaryFile(suffix=".mp4", delete=False)
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out_path = tmp_out.name
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fps = cap.get(cv2.CAP_PROP_FPS)
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w = int(cap.get(cv2.CAP_PROP_FRAME_WIDTH))
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h = int(cap.get(cv2.CAP_PROP_FRAME_HEIGHT))
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out = cv2.VideoWriter(out_path, fourcc, fps, (w, h))
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options = HandLandmarkerOptions(
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base_options=BaseOptions(model_asset_path=MODEL_PATH),
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running_mode=VisionRunningMode.IMAGE,
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num_hands=2,
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min_hand_detection_confidence=0.5,
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min_hand_presence_confidence=0.5,
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min_tracking_confidence=0.5
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)
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with HandLandmarker.create_from_options(options) as landmarker:
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while cap.isOpened():
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ret, frame = cap.read()
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if not ret:
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break
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rgb_frame = cv2.cvtColor(frame, cv2.COLOR_BGR2RGB)
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mp_img = mp_image(image_format=mp_format.SRGB, data=rgb_frame)
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results = landmarker.detect(mp_img)
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if results.hand_landmarks:
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for hand_landmarks in results.hand_landmarks:
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points = [(int(lm.x * w), int(lm.y * h)) for lm in hand_landmarks]
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for start, end in HAND_CONNECTIONS:
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color = get_finger_color(start)
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cv2.line(frame, points[start], points[end], color, 2)
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for i, (x, y) in enumerate(points):
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cv2.circle(frame, (x, y), 4, (0, 255, 255), -1)
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out.write(frame)
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cap.release()
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out.release()
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return out_path
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# Gradio interface
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demo = gr.Interface(
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fn=process_video,
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inputs=gr.Video(label="Upload Video or Use Webcam"),
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outputs=gr.Video(label="Hand Landmark Annotated Video"),
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title="Hand Detection ",
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description="Upload a video or use webcam to detect hands."
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)
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demo.launch()
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