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| # This file is modified from https://github.com/haotian-liu/LLaVA/ | |
| import os | |
| from .clip_encoder import CLIPVisionTower, SiglipVisionTower | |
| from copy import deepcopy | |
| from .convnext_encoder import ConvNextVisionTower | |
| 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 "siglip" in vision_tower: | |
| vision_tower_cfg.input_image_size = 384 | |
| return SiglipVisionTower(vision_tower, args=vision_tower_cfg, **kwargs) | |
| elif vision_tower == "convnext-576": | |
| ## ConvNeXt | |
| convnext_args = deepcopy(vision_tower_cfg) | |
| convnext_args.freeze_vision = False | |
| convnext_args.input_image_size = 576 | |
| convnext_vision_tower = "convnext_xxlarge.clip_laion2b_soup" # hardcode | |
| return ConvNextVisionTower(convnext_vision_tower, convnext_args) | |
| raise ValueError(f'Unknown vision tower: {vision_tower}') | |