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Update pages/video.py
Browse files- pages/video.py +53 -53
pages/video.py
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@@ -4,56 +4,56 @@ import matplotlib.pyplot as plt
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import seaborn as sns
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# Title
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import seaborn as sns
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# Title
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st.title("Understanding Video Data and Processing with OpenCV")
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# Subheader 1: What is Video Data?
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st.markdown("### What is Video Data?")
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st.markdown("""
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- **Video** is a collection of images known as **frames**.
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- Frames are visualized sequentially, creating the perception of motion.
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- **Frame Rate (FPS)** determines smoothness:
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- **30 FPS**: 30 frames per second.
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- **60 FPS**: 60 frames per second.
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- More FPS = smoother video.
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""")
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# Subheader 2: How to Play a Video Using OpenCV
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st.markdown("### :blue[How to Play a Video Using OpenCV]")
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st.markdown("""
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1. **Break the Video into Frames**:
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- A video is essentially a sequence of images (frames).
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- Use a `while` loop to iterate through frames, as the total frame count may not be known.
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2. **Key Functions**:
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- `cv2.VideoCapture(path)`: Captures the video and extracts frames.
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- `cv2.imshow()`: Displays a frame in a pop-up window.
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- `cv2.waitKey(1)`: Waits for 1 millisecond before moving to the next frame.
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3. **Exit Condition**:
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- Exit the loop when frames are exhausted or a specific key is pressed.
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""")
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# Subheader 3: Frame Handling Details
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st.markdown("### Frame Handling Details")
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st.markdown("""
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- Each frame contains:
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1. **Images**: Represented as 3D arrays (height, width, and color channels).
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2. **Boolean Values**:
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- `True`: Frame is present.
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- `False`: No frame, signaling the loop to terminate.
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""")
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# Subheader 4: Converting Video to Tabular Data
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st.markdown("### :green[Converting Video to Tabular Data]")
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st.markdown("""
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1. Use `cv2.VideoCapture()` to capture frames.
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2. Convert the frames into tabular data, where each frame's pixel values are rows or columns.
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""")
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# Subheader 5: Color Space Conversion
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st.markdown("### Color Space Conversion")
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st.markdown("""
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- OpenCV allows color space changes with `cv2.cvtColor()`.
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- **Syntax**: `cv2.cvtColor(img, cv2.COLOR_<source>2<destination>)`
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- Example:
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```python
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img = cv2.imread("path/to/image")
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gray_img = cv2.cvtColor(img, cv2.COLOR_BGR2GRAY)
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