Edge Video Converter

What is the Edge Video Converter?

The Edge Video Converter transforms ordinary videos into abstract, high-contrast outlines using the Canny Edge Detection algorithm. With this tool, every frame is reduced to its most essential lines, making your videos look like moving sketches. Whether you’re experimenting with computer vision, preparing artistic visuals, or simply curious about how machines detect shapes, this converter gives you a hands-on way to explore the science of edges.

Example Result

How It Works

Each frame of your video is analyzed using the Canny algorithm, a multi-stage edge detection method. Instead of simply applying a filter, Canny carefully smooths the image, calculates gradients, thins out unnecessary edges, and applies thresholds to decide which lines to keep. By repeating this process for every frame, the final video becomes a fluid sequence of outlines.

The Math Behind Canny Edge Detection

The Canny algorithm is mathematical at its core. It follows these steps:

1. Noise Reduction: Apply a Gaussian filter to smooth the frame.
G(x,y) = (1 / 2πσ²) * exp(-(x² + y²) / 2σ²)
2. Gradient Calculation: Use Sobel filters to compute intensity changes.
Magnitude: |G| = √(Gx² + Gy²)
Direction: θ = arctan(Gy / Gx)
3. Non-Maximum Suppression: Keep only local maxima along the gradient direction to thin edges.
4. Double Thresholding: Classify edges as strong, weak, or irrelevant.
5. Edge Tracking: Connect weak edges to strong ones if they are part of a valid contour.

Tips & Best Practices

• Lighting: Use well-lit videos for clearer results. Dark videos may result in black screens.
• Thresholds: Start with Low=50 and High=150. If the video is too black, lower the thresholds. If it's too messy, raise them.
• File Size: Short clips (under 30 seconds, MP4) process much faster.

Frequently Asked Questions (FAQ)

Q: What do the thresholds mean?
They control sensitivity. A low threshold detects faint lines, while a high threshold detects only sharp contrast changes.

Q: Will my video be stored?
No, your video is processed temporarily and deleted immediately after conversion.

Q: Why is my result blank?
Your thresholds might be too high for the lighting in your video. Try lowering them (e.g., 20 and 60).