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import math
from typing import ClassVar, List, Optional, Tuple, Union
import torch
from PIL import Image
from transformers import BatchFeature
from .processing_utils import BaseVisualRetrieverProcessor
import numpy as np
import torch
import torchvision.transforms as T
from decord import VideoReader, cpu
from PIL import Image
from torchvision.transforms.functional import InterpolationMode
from transformers import AutoModel, AutoTokenizer
from .conversation import get_conv_template
from transformers import BatchFeature, ProcessorMixin
class ColInternVL2Processor(BaseVisualRetrieverProcessor, ProcessorMixin):
"""
Processor for ColInternVL2.
"""
attributes = [ "tokenizer"]
image_processor_class = "InternVL2ImageProcessor"
tokenizer_class = ("Qwen2Tokenizer", "Qwen2TokenizerFast")
def __init__(self, tokenizer, **kwargs):
self.template = "Hermes-2"
self.num_image_token = 256
# self.max_num = 6
self.max_num = 4
if isinstance(tokenizer, str):
self.tokenizer = AutoTokenizer.from_pretrained(tokenizer, trust_remote_code=True, use_fast=False)
else:
self.tokenizer = tokenizer
self.tokenizer.padding_side = 'left'
self.IMAGENET_MEAN = (0.485, 0.456, 0.406)
self.IMAGENET_STD = (0.229, 0.224, 0.225)
self.IMG_CONTEXT_TOKEN='<IMG_CONTEXT>'
self.IMG_START_TOKEN='<img>'
self.IMG_END_TOKEN='</img>'
self.img_context_token_id = self.tokenizer.convert_tokens_to_ids(self.IMG_CONTEXT_TOKEN)
self.system_message = 'Bạn là một mô hình trí tuệ nhân tạo đa phương thức Tiếng Việt có tên gọi là Vintern, được phát triển bởi người Việt. Bạn là một trợ lý trí tuệ nhân tạo hữu ích và không gây hại.'
super().__init__(tokenizer)
def build_transform(self, input_size):
MEAN, STD = self.IMAGENET_MEAN, self.IMAGENET_STD
transform = T.Compose([
T.Lambda(lambda img: img.convert('RGB') if img.mode != 'RGB' else img),
T.Resize((input_size, input_size), interpolation=InterpolationMode.BICUBIC),
T.ToTensor(),
T.Normalize(mean=MEAN, std=STD)
])
return transform
def find_closest_aspect_ratio(self, aspect_ratio, target_ratios, width, height, image_size):
best_ratio_diff = float('inf')
best_ratio = (1, 1)
area = width * height
for ratio in target_ratios:
target_aspect_ratio = ratio[0] / ratio[1]
ratio_diff = abs(aspect_ratio - target_aspect_ratio)
if ratio_diff < best_ratio_diff:
best_ratio_diff = ratio_diff
best_ratio = ratio
elif ratio_diff == best_ratio_diff:
if area > 0.5 * image_size * image_size * ratio[0] * ratio[1]:
best_ratio = ratio
return best_ratio
def dynamic_preprocess(self, image, min_num=1, max_num=12, image_size=448, use_thumbnail=False):
orig_width, orig_height = image.size
aspect_ratio = orig_width / orig_height
# calculate the existing image aspect ratio
target_ratios = set(
(i, j) for n in range(min_num, max_num + 1) for i in range(1, n + 1) for j in range(1, n + 1) if
i * j <= max_num and i * j >= min_num)
target_ratios = sorted(target_ratios, key=lambda x: x[0] * x[1])
# find the closest aspect ratio to the target
target_aspect_ratio = self.find_closest_aspect_ratio(
aspect_ratio, target_ratios, orig_width, orig_height, image_size)
# calculate the target width and height
target_width = image_size * target_aspect_ratio[0]
target_height = image_size * target_aspect_ratio[1]
blocks = target_aspect_ratio[0] * target_aspect_ratio[1]
# resize the image
resized_img = image.resize((target_width, target_height))
processed_images = []
for i in range(blocks):
box = (
(i % (target_width // image_size)) * image_size,
(i // (target_width // image_size)) * image_size,
((i % (target_width // image_size)) + 1) * image_size,
((i // (target_width // image_size)) + 1) * image_size
)
# split the image
split_img = resized_img.crop(box)
processed_images.append(split_img)
assert len(processed_images) == blocks
if use_thumbnail and len(processed_images) != 1:
thumbnail_img = image.resize((image_size, image_size))
processed_images.append(thumbnail_img)
return processed_images
def load_image(self, image, input_size=448, max_num=12):
transform = self.build_transform(input_size=input_size)
images = self.dynamic_preprocess(image, image_size=input_size, use_thumbnail=True, max_num=max_num)
pixel_values = [transform(image) for image in images]
pixel_values = torch.stack(pixel_values)
return pixel_values
def process_images(
self,
images: List[Image.Image],
) -> BatchFeature:
"""
Process images for InternVl2.
"""
pixel_values = [ self.load_image(image, max_num=self.max_num) for image in images]
num_patches_list = [ pixel_.size(0) for pixel_ in pixel_values]
image_flags = [ torch.tensor([1] * pixel_.shape[0], dtype=torch.long) for pixel_ in pixel_values ]
queries = []
for idx, num_patches in enumerate(num_patches_list):
question = "<image>\nDescribe the image."
template = get_conv_template(self.template)
template.system_message = self.system_message
template.append_message(template.roles[0], question)
template.append_message(template.roles[1], None)
query = template.get_prompt()
image_tokens = self.IMG_START_TOKEN + self.IMG_CONTEXT_TOKEN * self.num_image_token * num_patches + self.IMG_END_TOKEN
query = query.replace('<image>', image_tokens, 1)
queries.append(query)
model_inputs = self.tokenizer(queries, return_tensors='pt', padding=True)
input_ids = model_inputs['input_ids'] #.to(self.device)
attention_mask = model_inputs['attention_mask'] #.to(self.device)
pixel_values = torch.cat(pixel_values)
batch_doc = BatchFeature({
"pixel_values" : pixel_values,
"input_ids" : input_ids,
"attention_mask" : attention_mask,
# "image_flags" : image_flags
})
return batch_doc
def process_queries(
self,
queries: List[str],
max_length: int = 100,
suffix: Optional[str] = None,
) -> BatchFeature:
"""
Process queries for InternVl2.
"""
texts_query: List[str] = []
for query in queries:
query = f"Query: {query}"
template = get_conv_template(self.template)
template.system_message = self.system_message
template.append_message(template.roles[0], query)
template.append_message(template.roles[1], None)
query = template.get_prompt()
texts_query.append(query)
model_inputs = self.tokenizer(texts_query, return_tensors='pt', max_length=max_length, padding="longest")
input_ids = model_inputs['input_ids'] #.to(self.device)
attention_mask = model_inputs['attention_mask'] #.to(self.device)
batch_query = BatchFeature({
"pixel_values" : None,
"input_ids" : input_ids,
"attention_mask" : attention_mask,
})
return batch_query
def score(
self,
qs: List[torch.Tensor],
ps: List[torch.Tensor],
device: Optional[Union[str, torch.device]] = None,
**kwargs,
) -> torch.Tensor:
"""
Compute the MaxSim score (ColBERT-like) for the given multi-vector query and passage embeddings.
"""
return self.score_multi_vector(qs, ps, device=device, **kwargs)
def get_n_patches(
self,
image_size: Tuple[int, int],
patch_size: int,
) -> Tuple[int, int]:
raise NotImplementedError("This method is not implemented for ColInternVL2.")
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