faster hsv augmentation

[jveitchmichaelis]

Faster HSV augmentation, as per #1096

🛠️ PR Summary

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🌟 Summary

Enhanced color augmentation in image processing for better performance and stability.

📊 Key Changes

• Introduced separate lookup tables (LUTs) for hue, saturation, and value channels in the augment_hsv function.
• Changes include conversion from a single-step transformation to a multi-step process utilizing cv2.split and cv2.LUT for better control over image transformation.
• Replaced direct application of random gains on the HSV image with an explicit calculation using lookup tables.

🎯 Purpose & Impact

• 🎨 Improved Color Augmentation: By using lookup tables, the augmentation process becomes more stable and prevents artifacts caused due to direct multiplication.
• 🛠️ Precision Enhancement: More precise control over the HSV color space adjustments for hue, saturation, and value is now possible.
• 🏃‍♂️ Potential Efficiency Gain: May lead to performance improvements in image pre-processing, enhancing the overall efficiency of machine learning workflows.
• 🔍 Better Image Quality: Ensures high-quality image transformations, possibly leading to improved object detection by YOLOv3 algorithms.

[glenn-jocher]

Awesome, thanks!