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import os
from .clip_encoder import CLIPVisionTower
from .multi_backbone_channel_concatenation_encoder import MultiBackboneChannelConcatenationVisionTower
def build_vision_tower(vision_tower_cfg, **kwargs):
vision_tower = getattr(vision_tower_cfg, 'mm_vision_tower', getattr(vision_tower_cfg, 'vision_tower', None))
if "clip" in vision_tower and vision_tower.startswith("openai"):
is_absolute_path_exists = os.path.exists(vision_tower)
if is_absolute_path_exists or vision_tower.startswith("openai") or vision_tower.startswith("laion") or "ShareGPT4V" in vision_tower:
return CLIPVisionTower(vision_tower, args=vision_tower_cfg, **kwargs)
raise ValueError(f'Unknown vision tower: {vision_tower}')
elif ";" in vision_tower:
return MultiBackboneChannelConcatenationVisionTower(vision_tower, args=vision_tower_cfg)
raise ValueError(f'Unknown vision tower: {vision_tower}')
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