Automatic coloring method and device for art line drawing and storage medium

The embodiment of the invention discloses an automatic coloring method and device for an artistic line painting and a storage medium, and the method comprises the steps: obtaining a line painting generated according to a photo input by a user or a line painting directly input by the user, and carrying out the preprocessing of the line painting, converting the preprocessed line drawing into a grey-scale map and carrying out normalization processing to obtain a target image; based on an instruction of a user, judging whether regional coloring is carried out or not, if yes, generating a corresponding analysis mask according to the photo, extracting a region needing to be colored according to the analysis mask and carrying out normalization processing to obtain a target region, and if not, skipping the step; obtaining a template converted into a first color space, and selecting a coloring method to color the template, the target image and/or the target area according to the depth of the template bottom color and