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import os |
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os.system('git clone https://github.com/pytorch/fairseq.git; cd fairseq;' |
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'pip install --use-feature=in-tree-build ./; cd ..') |
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os.system('ls -l') |
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import torch |
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import numpy as np |
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from fairseq import utils, tasks |
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from fairseq import checkpoint_utils |
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from utils.eval_utils import eval_step |
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from tasks.mm_tasks.caption import CaptionTask |
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from models.ofa import OFAModel |
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from PIL import Image |
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from torchvision import transforms |
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import gradio as gr |
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tasks.register_task('caption', CaptionTask) |
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use_cuda = torch.cuda.is_available() |
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use_fp16 = False |
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os.system('wget https://ofa-silicon.oss-us-west-1.aliyuncs.com/checkpoints/caption_large_best_clean.pt; ' |
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'mkdir -p checkpoints; mv caption_large_best_clean.pt checkpoints/caption.pt') |
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overrides = {"bpe_dir": "utils/BPE", "eval_cider": False, "beam": 5, |
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"max_len_b": 16, "no_repeat_ngram_size": 3, "seed": 7} |
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models, cfg, task = checkpoint_utils.load_model_ensemble_and_task( |
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utils.split_paths('checkpoints/caption.pt'), |
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arg_overrides=overrides |
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) |
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for model in models: |
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model.eval() |
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if use_fp16: |
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model.half() |
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if use_cuda and not cfg.distributed_training.pipeline_model_parallel: |
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model.cuda() |
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model.prepare_for_inference_(cfg) |
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generator = task.build_generator(models, cfg.generation) |
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mean = [0.5, 0.5, 0.5] |
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std = [0.5, 0.5, 0.5] |
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patch_resize_transform = transforms.Compose([ |
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lambda image: image.convert("RGB"), |
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transforms.Resize((cfg.task.patch_image_size, cfg.task.patch_image_size), interpolation=Image.BICUBIC), |
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transforms.ToTensor(), |
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transforms.Normalize(mean=mean, std=std), |
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]) |
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bos_item = torch.LongTensor([task.src_dict.bos()]) |
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eos_item = torch.LongTensor([task.src_dict.eos()]) |
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pad_idx = task.src_dict.pad() |
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def encode_text(text, length=None, append_bos=False, append_eos=False): |
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s = task.tgt_dict.encode_line( |
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line=task.bpe.encode(text), |
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add_if_not_exist=False, |
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append_eos=False |
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).long() |
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if length is not None: |
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s = s[:length] |
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if append_bos: |
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s = torch.cat([bos_item, s]) |
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if append_eos: |
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s = torch.cat([s, eos_item]) |
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return s |
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def construct_sample(image: Image): |
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patch_image = patch_resize_transform(image).unsqueeze(0) |
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patch_mask = torch.tensor([True]) |
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src_text = encode_text(" what does the image describe?", append_bos=True, append_eos=True).unsqueeze(0) |
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src_length = torch.LongTensor([s.ne(pad_idx).long().sum() for s in src_text]) |
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sample = { |
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"id": np.array(['42']), |
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"net_input": { |
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"src_tokens": src_text, |
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"src_lengths": src_length, |
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"patch_images": patch_image, |
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"patch_masks": patch_mask |
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} |
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} |
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return sample |
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def apply_half(t): |
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if t.dtype is torch.float32: |
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return t.to(dtype=torch.half) |
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return t |
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def image_caption(Image): |
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sample = construct_sample(Image) |
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sample = utils.move_to_cuda(sample) if use_cuda else sample |
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sample = utils.apply_to_sample(apply_half, sample) if use_fp16 else sample |
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with torch.no_grad(): |
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result, scores = eval_step(task, generator, models, sample) |
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return result[0]['caption'] |
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title = "OFA-Image_Caption" |
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description = "Gradio Demo for OFA-Image_Caption. Upload your own image or click any one of the examples, and click " \ |
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"\"Submit\" and then wait for the generated caption. " |
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article = "<p style='text-align: center'><a href='https://github.com/OFA-Sys/OFA' target='_blank'>OFA Github " \ |
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"Repo</a></p> " |
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examples = [['beatles.jpeg'], ['aurora.jpeg'], ['good_luck.png'], ['pokemons.jpg'], ['donuts.jpg']] |
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io = gr.Interface(fn=image_caption, inputs=gr.inputs.Image(type='pil'), outputs=gr.outputs.Textbox(label="Caption"), |
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title=title, description=description, article=article, examples=examples, |
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allow_flagging=False, allow_screenshot=False) |
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io.launch(enable_queue=True, cache_examples=True) |
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