🔹 Practice Program List (Step-by-Step Learning Path)

🟢 Beginner (Basics of OpenCV)

• Load, display, and save an image.
• Convert to grayscale.
• Resize and rotate an image.
• Crop a region of interest (ROI).
• Draw lines, circles, rectangles, and text on an image.
• Blend two images (addWeighted).
• Apply Gaussian blur, median blur.
• Edge detection (Canny).
• Print individual pixel values.
• Split color image to BGR.
• Flip images.

🟡 Intermediate (Image Processing)

• Histogram calculation for grayscale images.
• Histogram calculation for color images.
• Equalisation calculation.
• Thresholding (simple, adaptive, Otsu).
• Morphological operations (erosion, dilation, opening, closing).
• Detect and draw contours.
• Image pyramids (pyrUp, pyrDown).
• Perspective transform (warp image).
• Color detection using HSV (detect red, green, blue objects).

🔵 Advanced (Computer Vision & Fun Projects)

• Face detection using Haar cascades.
• Eye detection.
• Real-time object tracking with color.
• Motion detection using frame differencing.
• Background subtraction (MOG2).
• Barcode/QR code detection.
• Simple Augmented Reality (overlay an image on detected marker).

🔴 Projects

• Photo Editor App (crop, resize, filters, text).
• Virtual Painter (draw with finger using webcam & color detection).
• Face Mask Filter (overlay sunglasses/mask on face).
• Motion Detector (home surveillance mini project).
• Number Plate Detection (using contours + OCR if you like).