HorizontalFlip, ColorJitter, HueSaturationValue, RGBShift, RandomBrightnessContrast, CLAHE, RandomGamma, RandomRain, RandomFog, RandomSunFlare, MotionBlur, GaussianBlur, MedianBlur, GaussNoise, ISONoise, ImageCompression, Downscale を 59,904枚 に適用して mIoU 90.05 なら十分。