Noise reduction method and device, terminal and computer readable storage medium

The invention discloses a noise reduction method and device, a terminal and a computer readable storage medium. The noise reduction method comprises the following steps: acquiring a mask and arranging a plurality of video frames in a time sequence; and carrying out noise reduction processing on the mask, carrying out dynamic range compression processing on the mask and the plurality of video frames, subtracting the registration mask from the video frames, and carrying out noise reduction processing on the video frames. Therefore, the DSA video can be subjected to noise reduction processing. 本发明公开了一种降噪方法、装置、终端及计算机可读存储介质，该降噪方法包括以下步骤：获取蒙片和以时间顺序排列多个视频帧；对蒙片进行降噪处理，对蒙片以及多个视频帧进行动态范围压缩处理，将视频帧减去配准蒙片，对视频帧进行降噪处理。从而能够对DSA视频进行降噪处理。