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73 lines
2.6 KiB
73 lines
2.6 KiB
2 years ago
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# Copyright 2021 Zilliz. All rights reserved.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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import sys
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from pathlib import Path
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import torch
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from torchvision import transforms
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from torchvision.transforms.functional import InterpolationMode
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from towhee import register
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from towhee.operator.base import NNOperator, OperatorFlag
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from towhee.types.arg import arg, to_image_color
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from towhee.types.image_utils import from_pil, to_pil
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@register(output_schema=['vec'])
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class Blip(NNOperator):
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"""
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BLIP multi-modal embedding operator
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"""
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def __init__(self, model_name: str):
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super().__init__()
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sys.path.append(str(Path(__file__).parent))
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from models.blip import blip_decoder
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image_size = 384
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model_url = self._configs()[model_name]['weights']
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self.model = blip_decoder(pretrained=model_url, image_size=image_size, vit='base')
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self._modality = modality
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self.device = "cuda" if torch.cuda.is_available() else "cpu"
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self.model.to(self.device)
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self.model.eval()
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self.tfms = transforms.Compose([
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transforms.Resize((image_size,image_size),interpolation=InterpolationMode.BICUBIC),
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transforms.ToTensor(),
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transforms.Normalize((0.48145466, 0.4578275, 0.40821073), (0.26862954, 0.26130258, 0.27577711))
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])
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@arg(1, to_image_color('RGB'))
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def __call__(self, data:):
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vec = self._inference_from_image(data)
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return vec
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@arg(1, to_image_color('RGB'))
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def _inference_from_image(self, img):
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img = self._preprocess(img)
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caption = model.generate(img, sample=False, num_beams=3, max_length=20, min_length=5)
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return caption[0]
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def _preprocess(self, img):
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img = to_pil(img)
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processed_img = self.tfms(img).unsqueeze(0).to(self.device)
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return processed_img
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def _configs(self):
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config = {}
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config['blip_base'] = {}
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config['blip_base']['weights'] = 'https://storage.googleapis.com/sfr-vision-language-research/BLIP/models/model_base_capfilt_large.pth'
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return config
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