defensetongxue

ambiguity of albumentations.ToGray()

2

## 🐛 Bug albumentations.augmentations.transforms.ToGray return a 3 channels image from ```python # albumentations/albumentations/augmentations/funtional.py def to_gray(img): gray = cv2.cvtColor(img, cv2.COLOR_RGB2GRAY) return cv2.cvtColor(gray, cv2.COLOR_GRAY2RGB) ``` which means this funtion repeat the gray...