Visual Tokenizer: IMAGE_ATOM_ID

[KyujinHan]

Hello!
While studying the Ovis model, I have some questions!

Question1.🧐
What is IMAGE_ATOM_ID??

Question2.🧐

Ovis/ovis/model/visual_tokenizer/base_visual_tokenizer.py

Line 109 in d248e34

def preprocess_image(self, image: PIL.Image.Image, max_partition=9, covering_threshold=0.9, convert_to_rgb=True):

and

Ovis/ovis/model/visual_tokenizer/base_visual_tokenizer.py

Line 96 in d248e34

def construct_image_placeholders(grid):

Could you explain the codes above with max_partition variables?

Thank you!🤗