* add transformer Rgb2Gray * restore * fix self.weights * restore * fix code * restore * fix syntax error * restore
* add RandomRotate for transforms * change rotation function to mmcv.imrotate * refactor * add unittest * fixed test * fixed docstring * fixed test * add more test * fixed repr * rename to prob * fixed unittest Co-authored-by: hkzhang95 <GodBlessZhk@outlook.com>