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crumb/
pmclip-test-run-checkpoints-10

Name: pmclip-test-run-checkpoints-10
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this is labelled as "poor-man's clip" in a very old google colab i found, transformers==4.21.0 required

some old incomplete code i found to maybe run this:

python

from torch import nn, optim
import torch
import os
import pandas as pd
import torch.nn.functional as F

class CFG:
    debug = False

    device = torch.device("cuda" if torch.cuda.is_available() else "cpu")

    model_name = 'facebook/dino-vitb16'
    image_embedding = 768
    text_encoder_model = "microsoft/deberta-v3-base"
    text_embedding = 768
    text_tokenizer = "microsoft/deberta-v3-base"
    max_length = 200

    pretrained = True # for both image encoder and text encoder
    trainable = True # for both image encoder and text encoder
    temperature = 1.0

    # image size
    size = 224

    # for projection head; used for both image and text encoders
    projection_dim = 768 
    projection_width = 768
    projection_heads = 16

class ImageEncoder(nn.Module):
    """
    Encode images to a fixed size vector
    """
    def __init__(
        self, model_name=CFG.model_name, pretrained=CFG.pretrained, trainable=CFG.trainable
    ):
        super().__init__()
        #self.model = timm.create_model(
        #    model_name, pretrained, num_classes=0, global_pool="avg"
        #)
        self.model = ViTModel.from_pretrained(model_name)
        self.feature_extractor = ViTFeatureExtractor.from_pretrained(model_name)
        for p in self.model.parameters():
            p.requires_grad = trainable

    def forward(self, x):
        return self.model(x).last_hidden_state[:,0,:]

class TextEncoder(nn.Module):
    def __init__(self, model_name=CFG.text_encoder_model, pretrained=CFG.pretrained, trainable=CFG.trainable):
        super().__init__()
        if pretrained:
            self.model = DebertaV2Model.from_pretrained(model_name)
        else:
            self.model = DebertaV2Model(config=DistilBertConfig())
            
        for p in self.model.parameters():
            p.requires_grad = trainable

        # we are using the CLS token hidden representation as the sentence's embedding
        self.target_token_idx = 0

    def forward(self, input_ids, attention_mask):
        output = self.model(input_ids=input_ids, attention_mask=attention_mask)
        last_hidden_state = output.last_hidden_state
        return last_hidden_state[:, self.target_token_idx, :]

from collections import OrderedDict
from torch import nn
import torch

class QuickGELU(nn.Module):
    def forward(self, x: torch.Tensor):
        return x * torch.sigmoid(1.702 * x)

class ProjectionHead(nn.Module):
    def __init__(
        self,
        embedding_dim,
        projection_dim=384,
        dropout=0.1
    ):
        super().__init__()
        self.projection = nn.Linear(embedding_dim, projection_dim)
        self.gelu = QuickGELU()
        self.fc = nn.Linear(projection_dim, projection_dim)
        self.dropout = nn.Dropout(dropout)
        self.layer_norm = nn.LayerNorm(projection_dim)
    
    def forward(self, x):
        projected = self.projection(x)
        x = self.gelu(projected)
        x = self.fc(x)
        x = self.dropout(x)
        x = x + projected
        x = self.layer_norm(x)
        return x


class CLIPModel(nn.Module):
    def __init__(self):
        super().__init__()
        self.feature_extractor = ViTFeatureExtractor.from_pretrained('facebook/dino-vitb16')
        self.image_encoder = ViTModel.from_pretrained('facebook/dino-vitb16').to('cuda')
        self.text_encoder = DebertaV2Model.from_pretrained("microsoft/deberta-v3-base").to('cuda')
        self.image_projection = ProjectionHead(768).to('cuda')
        self.text_projection = ProjectionHead(768).to('cuda')
        self.temperature = 1.0
    def encode_image(self, x):
        x = self.image_encoder(x).last_hidden_state[:,0,:]
        x = self.image_projection(x)
        return x
    def encode_text(self, x):
        x = self.text_encoder(x['input_ids'].cuda()).last_hidden_state[:,0,:]
        x = self.text_projection(x)
        return x
    def tokenize(self, x):
        return tokenizer(x, return_tensors='pt', padding=True, truncation=True)
    def preprocess(self, x):
        x = self.feature_extractor(x, return_tensors='pt')
        return x.convert_to_tensors()['pixel_values'].to('cuda')

def cross_entropy(preds, targets, reduction='none'):
    log_softmax = nn.LogSoftmax(dim=-1)
    loss = (-targets * log_softmax(preds)).sum(1)
    if reduction == "none":
        return loss
    elif reduction == "mean":
        return loss.mean()

loading, probably?

python

from huggingface_hub import hf_hub_url, cached_download
model_name = "model.pt"
model_url = hf_hub_url("crumb/pmclip-test-run-checkpoints-10", filename=model_name)
file_path = cached_download(model_url)
tokenizer = DebertaV2Tokenizer.from_pretrained(CFG.text_tokenizer)
model = CLIPModel().to(CFG.device)
model.load_state_dict(torch.load(file_path))
model = model.eval().cuda()
print("num params", sum(p.numel() for p in model.parameters()) // 10000 / 100, 'M')
# num params 271.1 M