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transformers/docs/source/ro/multimodal_processing.md
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# Procesatoare multimodale
Un procesator combină un tokenizer cu unul sau mai multe procesatoare de modalitate, cum ar fi un procesator de imagini, un procesator video sau un feature extractor. Expune o singură metodă `__call__` care direcționează fiecare input la componenta potrivită și îmbină ieșirile într-un singur dicționar.
Unele modele multimodale intercalează textul cu imagini, videoclipuri sau audio. Pentru aceste modele, [`ProcessorMixin`] poate înlocui token-urile placeholder precum `<image>`, `<video>` și `<audio>` cu pattern-ul de token pe care îl așteaptă modelul.
## Adăugarea unui procesator nou
Definești o clasă de procesator creând `src/transformers/models/<model>/processing_<my_model_name>.py` și subclasând `ProcessorMixin`. Asigură-te că definești un obiect `TypedDict` cu valori implicite și îl atribui ca `cls.valid_processor_kwargs`.
```python
from ...processing_utils import ProcessorMixin, ProcessingKwargs, Unpack
class MyModelProcessorKwargs(ProcessingKwargs, total=False):
images_kwargs: MyModelImageProcessorKwargs
_defaults = {
"text_kwargs": {"padding": True},
"images_kwargs": {"do_convert_rgb": True},
}
class MyModelProcessor(ProcessorMixin):
valid_processor_kwargs = MyModelProcessorKwargs
def __init__(self, image_processor, tokenizer, chat_template=None, **kwargs):
self.image_token = tokenizer.image_token
self.image_token_id = tokenizer.image_token_id
super().__init__(
image_processor=image_processor,
tokenizer=tokenizer,
chat_template=chat_template,
**kwargs,
)
```
Implementează `replace_<modality>_token` dacă e nevoie. Acesta primește dicționarul complet de ieșire de la subprocesator și indexul inputului curent, returnând șirul de înlocuire expandat pentru acel input. Șirul de înlocuire este ceea ce modelul așteaptă în secvența de input.
Dacă modelul nu folosește deloc repetarea placeholder-ului (fără `image_token` definit), nu trebuie să suprascrii această metodă. Lasă `self.image_token` nesetat și clasa de bază sare peste înlocuire complet.
```python
def replace_image_token(self, image_inputs: dict, image_idx: int) -> str:
num_crops = image_inputs["num_crops"][image_idx]
return f"{self.boi_token}{self.image_token * self.num_image_tokens * num_crops}{self.eoi_token}"
```
Opțional, suprascrie metodele `prepare_inputs_layout` și `validate_inputs` dacă modelul necesită o structură specifică de input înainte ca procesarea să înceapă, precum reordonarea imaginilor ca o listă imbricată sau o validare specifică modelului pe lângă verificările comune.
```python
def prepare_inputs_layout(self, images=None, text=None, videos=None, audio=None, **kwargs):
# Apelează `super()` ca să aplici mai întâi pașii comuni de pregătire
images, text, videos, audio = super().prepare_inputs_layout(images, text, videos, audio)
if images is not None:
images = make_nested_list_of_images(images)
return images, text, videos, audio
def validate_inputs(self, images=None, text=None, videos=None, audio=None, **kwargs):
super().validate_inputs(images=images, text=text, **kwargs)
if text is not None and images is not None:
n_tokens = [s.count(self.image_token) for s in text]
n_images = [len(img_list) for img_list in images]
if n_tokens != n_images:
raise ValueError(
f"Number of {self.image_token} tokens in text {n_tokens} does not match "
f"number of images {n_images}."
)
```
> [!TIP]
> Vezi [`Gemma4Processor`] și [`Qwen2VLProcessor`] ca referință.
## Testare
Toate procesatoarele multimodale ar trebui să aibă o clasă de test care moștenește din [`ProcessorTesterMixin`]. Mixin-ul acesta oferă o suită standard care acoperă tokenizarea, procesarea imaginilor, batch-urile și codificarea round-trip.
```python
# tests/models/my_model_name/test_processor_<my_model_name>.py
from transformers.testing_utils import require_vision
from transformers.utils import is_vision_available
from ...test_processing_common import ProcessorTesterMixin
if is_vision_available():
from transformers import MyModelProcessor
@require_vision
class MyModelProcessorTest(ProcessorTesterMixin, unittest.TestCase):
processor_class = MyModelProcessor
def get_processor(self):
return MyModelProcessor.from_pretrained("hf-internal-testing/my-model-test")
```