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tests/models/llava_onevision/test_modeling_llava_onevision.py

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+# Copyright 2024 The HuggingFace Inc. team. All rights reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+"""Testing suite for the PyTorch Llava-NeXT model."""
+
+import unittest
+
+import numpy as np
+import pytest
+import requests
+from huggingface_hub import hf_hub_download
+from parameterized import parameterized
+
+from transformers import (
+    AutoProcessor,
+    LlavaOnevisionConfig,
+    LlavaOnevisionForConditionalGeneration,
+    LlavaOnevisionModel,
+    is_torch_available,
+    is_vision_available,
+)
+from transformers.testing_utils import (
+    Expectations,
+    cleanup,
+    require_bitsandbytes,
+    require_torch,
+    slow,
+    torch_device,
+)
+
+from ...generation.test_utils import GenerationTesterMixin
+from ...test_configuration_common import ConfigTester
+from ...test_modeling_common import (
+    ModelTesterMixin,
+    floats_tensor,
+    ids_tensor,
+)
+
+
+if is_torch_available():
+    import torch
+
+
+if is_vision_available():
+    from PIL import Image
+
+
+class LlavaOnevisionVisionText2TextModelTester:
+    def __init__(
+        self,
+        parent,
+        ignore_index=-100,
+        image_token_index=1,
+        video_token_index=2,
+        projector_hidden_act="gelu",
+        seq_length=7,
+        vision_feature_select_strategy="full",
+        vision_feature_layer=-1,
+        text_config={
+            "model_type": "qwen2",
+            "seq_length": 7,
+            "is_training": True,
+            "use_input_mask": True,
+            "use_token_type_ids": False,
+            "use_labels": True,
+            "vocab_size": 99,
+            "hidden_size": 32,
+            "num_hidden_layers": 2,
+            "num_attention_heads": 4,
+            "num_key_value_heads": 4,
+            "intermediate_size": 37,
+            "hidden_act": "gelu",
+            "hidden_dropout_prob": 0.1,
+            "attention_probs_dropout_prob": 0.1,
+            "max_position_embeddings": 580,
+            "type_vocab_size": 16,
+            "type_sequence_label_size": 2,
+            "initializer_range": 0.02,
+            "num_labels": 3,
+            "num_choices": 4,
+            "pad_token_id": 0,
+        },
+        is_training=True,
+        vision_config={
+            "image_size": 16,
+            "patch_size": 8,
+            "num_channels": 3,
+            "is_training": True,
+            "hidden_size": 32,
+            "projection_dim": 32,
+            "num_hidden_layers": 2,
+            "num_attention_heads": 4,
+            "intermediate_size": 37,
+            "dropout": 0.1,
+            "attention_dropout": 0.1,
+            "initializer_range": 0.02,
+        },
+    ):
+        self.parent = parent
+        self.ignore_index = ignore_index
+        self.image_token_index = image_token_index
+        self.video_token_index = video_token_index
+        self.projector_hidden_act = projector_hidden_act
+        self.vision_feature_select_strategy = vision_feature_select_strategy
+        self.vision_feature_layer = vision_feature_layer
+        self.text_config = text_config
+        self.vision_config = vision_config
+        self.pad_token_id = text_config["pad_token_id"]
+        self.num_image_tokens = 10
+        self.seq_length = seq_length + self.num_image_tokens
+
+        self.num_hidden_layers = text_config["num_hidden_layers"]
+        self.vocab_size = text_config["vocab_size"]
+        self.hidden_size = text_config["hidden_size"]
+        self.num_attention_heads = text_config["num_attention_heads"]
+        self.is_training = is_training
+
+        self.batch_size = 3
+        self.num_channels = 3
+        self.image_size = 30
+        self.image_grid_pinpoints = [[16, 16]]
+
+    def get_config(self):
+        return LlavaOnevisionConfig(
+            text_config=self.text_config,
+            vision_config=self.vision_config,
+            ignore_index=self.ignore_index,
+            image_token_index=self.image_token_index,
+            video_token_index=self.video_token_index,
+            projector_hidden_act=self.projector_hidden_act,
+            vision_feature_select_strategy=self.vision_feature_select_strategy,
+            vision_feature_layer=self.vision_feature_layer,
+            image_grid_pinpoints=self.image_grid_pinpoints,
+        )
+
+    def prepare_config_and_inputs(self):
+        pixel_values = floats_tensor(
+            [
+                self.batch_size,
+                3,
+                self.vision_config["num_channels"],
+                self.vision_config["image_size"],
+                self.vision_config["image_size"],
+            ]
+        )
+        config = self.get_config()
+
+        return config, pixel_values
+
+    def prepare_config_and_inputs_for_common(self):
+        config_and_inputs = self.prepare_config_and_inputs()
+        config, pixel_values = config_and_inputs
+        input_ids = ids_tensor([self.batch_size, self.seq_length], config.text_config.vocab_size - 2) + 2
+        attention_mask = torch.ones(input_ids.shape, dtype=torch.long).to(torch_device)
+
+        input_ids[input_ids == config.image_token_index] = self.pad_token_id
+        input_ids[:, : self.num_image_tokens] = config.image_token_index
+
+        labels = torch.zeros((self.batch_size, self.seq_length), dtype=torch.long, device=torch_device)
+        labels[:, : self.num_image_tokens] == self.ignore_index
+
+        inputs_dict = {
+            "pixel_values": pixel_values,
+            "image_sizes": torch.tensor([[45, 45]] * self.batch_size),
+            "input_ids": input_ids,
+            "attention_mask": attention_mask,
+            "labels": labels,
+        }
+        return config, inputs_dict
+
+
+@require_torch
+class LlavaOnevisionForConditionalGenerationModelTest(ModelTesterMixin, GenerationTesterMixin, unittest.TestCase):
+    """
+    Model tester for `LlavaOnevisionForConditionalGeneration`.
+    """
+
+    all_model_classes = (
+        (
+            LlavaOnevisionModel,
+            LlavaOnevisionForConditionalGeneration,
+        )
+        if is_torch_available()
+        else ()
+    )
+    pipeline_model_mapping = (
+        {
+            "image-text-to-text": LlavaOnevisionForConditionalGeneration,
+            "any-to-any": LlavaOnevisionForConditionalGeneration,
+        }
+        if is_torch_available()
+        else {}
+    )
+    # LlavaOnevision merges batch_size and num_patches in the first output dimension
+    skip_test_image_features_output_shape = True
+    # LlavaOnevision merges batch_size and num_frames in the first output dimension
+    skip_test_video_features_output_shape = True
+
+    # MP works but offload doesn't work when the MultiheadAttention is offloaded
+    # TODO: One potential solution would be to add to set preload_module_classes = ["Siglip2MultiheadAttentionPoolingHead"]
+    # in the dispatch_model function
+    test_cpu_offload = False
+    test_disk_offload_safetensors = False
+    test_disk_offload_bin = False
+    test_torch_exportable = False
+    _is_composite = True
+
+    def setUp(self):
+        self.model_tester = LlavaOnevisionVisionText2TextModelTester(self)
+        common_properties = ["image_token_index", "video_token_index", "vision_feature_layer"]
+        self.config_tester = ConfigTester(
+            self, config_class=LlavaOnevisionConfig, has_text_modality=False, common_properties=common_properties
+        )
+
+    def test_config(self):
+        self.config_tester.run_common_tests()
+
+    def test_odd_sized_image(self):
+        # prepare model configuration
+        config = self.model_tester.get_config()
+
+        # prepare input
+        num_image_tokens = 10
+        pixel_values = floats_tensor([1, 2, 3, config.vision_config.image_size, config.vision_config.image_size])
+        input_ids = ids_tensor([1, 64], config.text_config.vocab_size - 2) + 2
+        input_ids[:, :num_image_tokens] = config.image_token_index
+        attention_mask = torch.ones(input_ids.shape, dtype=torch.long).to(torch_device)
+        inputs_dict = {
+            "pixel_values": pixel_values,
+            "image_sizes": torch.tensor([[13, 16]]),  # odd-sized image
+            "input_ids": input_ids,
+            "attention_mask": attention_mask,
+        }
+
+        # forward with odd-sized image input
+        for model_class in self.all_model_classes:
+            model = model_class(config).to(torch_device)
+            model(**inputs_dict)
+
+    @parameterized.expand(
+        [
+            (-1,),
+            ([-1],),
+            ([-1, -2],),
+        ],
+    )
+    def test_vision_feature_layers(self, vision_feature_layer):
+        """
+        Test that we can use either one vision feature layer, or a list of
+        vision feature layers.
+        """
+        config, input_dict = self.model_tester.prepare_config_and_inputs_for_common()
+        config.vision_feature_layer = vision_feature_layer
+
+        num_feature_layers = 1 if isinstance(vision_feature_layer, int) else len(vision_feature_layer)
+        hidden_size = config.vision_config.hidden_size
+        expected_features = hidden_size * num_feature_layers
+
+        for model_class in self.all_model_classes:
+            model = model_class(config).to(torch_device)
+            # We should have the right number of input features,
+            # and should be able to run a forward pass without exploding
+            base_model = getattr(model, "model", model)
+            assert base_model.multi_modal_projector.linear_1.in_features == expected_features
+            model(**input_dict)
+
+    @pytest.mark.xfail(reason="This architecture seems to not compute gradients for some layer.")
+    def test_training_gradient_checkpointing(self):
+        super().test_training_gradient_checkpointing()
+
+    @pytest.mark.xfail(reason="This architecture seems to not compute gradients for some layer.")
+    def test_training_gradient_checkpointing_use_reentrant_false(self):
+        super().test_training_gradient_checkpointing_use_reentrant_false()
+
+    @pytest.mark.xfail(reason="This architecture seems to not compute gradients for some layer.")
+    def test_training_gradient_checkpointing_use_reentrant_true(self):
+        super().test_training_gradient_checkpointing_use_reentrant_true()
+
+    @unittest.skip(
+        "VLMs need lots of steps to prepare images/mask correctly to get pad-free inputs. Can be tested as part of LLM test"
+    )
+    def test_flash_attention_2_padding_matches_padding_free_with_position_ids(self):
+        pass
+
+    def _video_features_prepare_config_and_inputs(self):
+        """
+        Helper method to extract only video-related inputs from the full set of inputs, for testing `get_video_features`.
+
+        The superclass method will rename "pixel_values" to "pixel_values_videos" automatically, but LlavaOnevision's
+        `get_video_features` uses "pixel_values" as input, so we need to override the inputs accordingly.
+        """
+        pixel_values_videos = floats_tensor(
+            [
+                self.model_tester.batch_size,
+                8,
+                self.model_tester.vision_config["num_channels"],
+                self.model_tester.vision_config["image_size"],
+                self.model_tester.vision_config["image_size"],
+            ]
+        )
+        config = self.model_tester.get_config()
+        inputs_dict = {"pixel_values": pixel_values_videos}
+        return config, inputs_dict
+
+
+@require_torch
+class LlavaOnevisionForConditionalGenerationIntegrationTest(unittest.TestCase):
+    def setUp(self):
+        self.processor = AutoProcessor.from_pretrained(
+            "llava-hf/llava-onevision-qwen2-0.5b-ov-hf", padding_side="left"
+        )
+        image_file = hf_hub_download(
+            repo_id="raushan-testing-hf/images_test", filename="llava_v1_5_radar.jpg", repo_type="dataset"
+        )
+        video_file = hf_hub_download(
+            repo_id="raushan-testing-hf/videos-test", filename="video_demo.npy", repo_type="dataset"
+        )
+        self.image = Image.open(image_file)
+        self.video = np.load(video_file)
+        self.prompt_image = "user\n<image>\nWhat do you see in this image?<|im_end|>\n<|im_start|>assistant\n"
+        self.prompt_video = "user\n<video>\nWhat do you see in this video?<|im_end|>\n<|im_start|>assistant\n"
+
+    def tearDown(self):
+        cleanup(torch_device, gc_collect=True)
+
+    @slow
+    @require_bitsandbytes
+    def test_small_model_integration_test(self):
+        model = LlavaOnevisionForConditionalGeneration.from_pretrained(
+            "llava-hf/llava-onevision-qwen2-0.5b-ov-hf", dtype="float16", device_map=torch_device
+        )
+
+        inputs = self.processor(images=self.image, text=self.prompt_image, return_tensors="pt").to(
+            torch_device, torch.float16
+        )
+        self.assertTrue(inputs.input_ids.shape[1] == 6567)  # should expand num-image-tokens times
+        self.assertTrue(inputs.pixel_values.shape == torch.Size([1, 10, 3, 384, 384]))
+        self.assertTrue(inputs.image_sizes.tolist() == [[899, 1024]])
+
+        # verify single forward pass
+        inputs = inputs.to(torch_device)
+
+        # verify generation
+        output = model.generate(**inputs, max_new_tokens=100)
+
+        EXPECTED_DECODED_TEXTS = Expectations(
+            {
+                ("xpu", 3): 'user\n\nWhat do you see in this image?\nassistant\nThe image is a radar chart that compares the performance of different models in a specific task, likely related to natural language processing or machine learning. The chart is divided into several axes, each representing a different model or method. The models are color-coded and labeled with their respective names. The axes are labeled with terms such as "VQA," "GQA," "MQA," "VIZ," "TextVQA," "SQA-IMG," and "MQE." The radar chart shows',
+                ("cuda", 7): 'user\n\nWhat do you see in this image?\nassistant\nThe image is a radar chart that compares the performance of different models in a specific task, likely related to natural language processing or machine learning. The chart is divided into several axes, each representing a different model or method. The models are color-coded and labeled with their respective names. The axes are labeled with terms such as "VQA," "GQA," "MQA," "VQAv2," "MM-Vet," "LLaVA-Bench," "LLaVA-1',
+                ("cuda", 8): 'user\n\nWhat do you see in this image?\nassistant\nThe image is a radar chart that compares the performance of different models in a specific task, likely related to natural language processing or machine learning. The chart is divided into several axes, each representing a different model or method. The models are color-coded and labeled with their respective names. The axes are labeled with terms such as "VQA," "GQA," "MQA," "VIZ," "TextVQA," "SQA-IMG," and "MQE." The radar chart shows',
+            }
+        )  # fmt: skip
+        EXPECTED_DECODED_TEXT = EXPECTED_DECODED_TEXTS.get_expectation()
+        DECODED_TEXT = self.processor.decode(output[0], skip_special_tokens=True)
+
+        self.assertEqual(DECODED_TEXT, EXPECTED_DECODED_TEXT)
+
+    @slow
+    @require_bitsandbytes
+    def test_small_model_integration_test_batch(self):
+        model = LlavaOnevisionForConditionalGeneration.from_pretrained(
+            "llava-hf/llava-onevision-qwen2-0.5b-ov-hf", dtype="float16", device_map=torch_device
+        )
+
+        inputs = self.processor(
+            text=[self.prompt_image, self.prompt_video],
+            images=self.image,
+            videos=self.video,
+            return_tensors="pt",
+            padding=True,
+        ).to(torch_device, torch.float16)
+
+        output = model.generate(**inputs, max_new_tokens=20)
+
+        EXPECTED_DECODED_TEXT = ['user\n\nWhat do you see in this image?\nassistant\nThe image is a radar chart that compares the performance of different models in a specific task, likely related', 'user\n\nWhat do you see in this video?\nassistant\nA child wearing a light blue sleeveless top and pink pants is seen sitting on a bed, eng']  # fmt: skip
+
+        self.assertEqual(
+            self.processor.batch_decode(output, skip_special_tokens=True),
+            EXPECTED_DECODED_TEXT,
+        )
+
+    @slow
+    @require_bitsandbytes
+    def test_small_model_integration_test_video(self):
+        # related to (#29835)
+        model = LlavaOnevisionForConditionalGeneration.from_pretrained(
+            "llava-hf/llava-onevision-qwen2-0.5b-ov-hf",
+            dtype="float16",
+            device_map=torch_device,
+        )
+
+        inputs = self.processor(text=self.prompt_video, videos=self.video, return_tensors="pt").to(
+            torch_device, torch.float16
+        )
+
+        # verify generation
+        output = model.generate(**inputs, max_new_tokens=40)
+        EXPECTED_DECODED_TEXT = 'user\n\nWhat do you see in this video?\nassistant\nA child wearing a light blue sleeveless top and pink pants is seen sitting on a bed, engrossed in reading a book.'  # fmt: skip
+
+        self.assertEqual(
+            self.processor.decode(output[0], skip_special_tokens=True),
+            EXPECTED_DECODED_TEXT,
+        )
+
+    @slow
+    @require_bitsandbytes
+    def test_small_model_integration_test_multi_image(self):
+        # related to (#29835)
+        model = LlavaOnevisionForConditionalGeneration.from_pretrained(
+            "llava-hf/llava-onevision-qwen2-0.5b-ov-hf",
+            dtype="float16",
+            device_map=torch_device,
+        )
+
+        url = "https://huggingface.co/datasets/huggingface/documentation-images/resolve/main/transformers/tasks/australia.jpg"
+        image = Image.open(requests.get(url, stream=True).raw)
+        prompt = (
+            "user\n<image><image>\nWhat is the difference between these images?<|im_end|>\n<|im_start|>assistant\n"
+        )
+        inputs = self.processor(text=prompt, images=[self.image, image], return_tensors="pt").to(
+            torch_device, torch.float16
+        )
+
+        # verify generation
+        output = model.generate(**inputs, max_new_tokens=40)
+        output_text = self.processor.decode(output[0], skip_special_tokens=True)
+        # fmt: off
+        EXPECTED_DECODED_TEXTS = Expectations(
+            {
+                ("cuda", None): "user\n\nWhat is the difference between these images?\nassistant\nThe images you've provided appear to be related to a graphical representation of a radar chart, which is a type of data visualization used to show the distribution of a particular variable across a geographic area. The",
+                ("xpu", 3): "user\n\nWhat is the difference between these images?\nassistant\nThe images you've provided appear to be related to a graphical representation of a radar chart, which is a type of data visualization used to show the distribution of a particular variable across a geographic area. The",
+            }
+        )
+        EXPECTED_DECODED_TEXT = EXPECTED_DECODED_TEXTS.get_expectation()
+        # fmt: on
+
+        self.assertEqual(output_text, EXPECTED_DECODED_TEXT)
+
+    @slow
+    @require_bitsandbytes
+    def test_small_model_integration_test_multi_image_nested(self):
+        # related to (#34585)
+        model = LlavaOnevisionForConditionalGeneration.from_pretrained(
+            "llava-hf/llava-onevision-qwen2-0.5b-ov-hf",
+            dtype="float16",
+            device_map=torch_device,
+        )
+
+        url = "https://huggingface.co/datasets/huggingface/documentation-images/resolve/main/transformers/tasks/australia.jpg"
+        image = Image.open(requests.get(url, stream=True).raw)
+        prompts = [
+            "user\nTell me about the french revolution.<|im_end|>\n<|im_start|>assistant\n",  # text-only case
+            "user\n<image><image>\nWhat is the difference between these images?<|im_end|>\n<|im_start|>assistant\n",
+            self.prompt_image,
+        ]
+        images_nested = [[], [image, self.image], [self.image]]
+        inputs = self.processor(
+            text=prompts,
+            images=images_nested,
+            return_tensors="pt",
+            padding=True,
+        ).to(torch_device, torch.float16)
+
+        # verify generation
+        output = model.generate(**inputs, max_new_tokens=40)
+        # fmt: off
+        EXPECTED_DECODED_TEXTS = Expectations(
+            {
+                ("cuda", None): [
+                    "user\nTell me about the french revolution.\nassistant\nThe French Revolution! A pivotal event in modern history that had a profound impact on the course of Western civilization. Here's a brief overview:\n\n**Background**\n\nIn the late 18th century,",
+                    "user\n\nWhat is the difference between these images?\nassistant\nThe first image shows a stop sign with a traditional Chinese architectural background, while the second image displays a radar chart with various algorithms and models, including BLIP-2, InstructBLIP, Q",
+                    "user\n\nWhat do you see in this image?\nassistant\nThe image is a radar chart that compares the performance of different models in a specific task, likely related to natural language processing or machine learning. The chart is divided into several axes, each representing a different"
+                    ],
+                ("xpu", 3): [
+                    "user\nTell me about the french revolution.\nassistant\nThe French Revolution! A pivotal event in modern history that had a profound impact on the course of Western civilization. Here's a brief overview:\n\n**Background**\n\nIn the late 18th century,",
+                    "user\n\nWhat is the difference between these images?\nassistant\nThe first image shows a stop sign with a traditional Chinese architectural background, while the second image displays a radar chart with various algorithms and models, including BLIP-2, InstructBLIP, Q",
+                    "user\n\nWhat do you see in this image?\nassistant\nThe image is a radar chart that compares the performance of different models in a specific task, likely related to natural language processing or machine learning. The chart is divided into several axes, each representing a different"
+                    ],
+            }
+        )
+        EXPECTED_DECODED_TEXT = EXPECTED_DECODED_TEXTS.get_expectation()
+        # fmt: on
+        DECODED_TEXT = self.processor.batch_decode(output, skip_special_tokens=True)
+
+        self.assertListEqual(DECODED_TEXT, EXPECTED_DECODED_TEXT)
+
+    @slow
+    @require_bitsandbytes
+    def test_small_model_integration_test_multi_video(self):
+        # related to (#29835)
+        model = LlavaOnevisionForConditionalGeneration.from_pretrained(
+            "llava-hf/llava-onevision-qwen2-0.5b-ov-hf",
+            dtype="float16",
+            device_map=torch_device,
+        )
+
+        prompt = "user\n<video><video>\nAre these videos identical?<|im_end|>\n<|im_start|>assistant\n"
+        inputs = self.processor(text=prompt, videos=[self.video, self.video], return_tensors="pt").to(
+            torch_device, torch.float16
+        )
+
+        # verify generation
+        output = model.generate(**inputs, max_new_tokens=40)
+        EXPECTED_DECODED_TEXT = "user\n\nAre these videos identical?\nassistant\nNo, the video is not identical; it shows slight variations in the child's actions and the background."  # fmt: skip
+
+        self.assertEqual(
+            self.processor.decode(output[0], skip_special_tokens=True),
+            EXPECTED_DECODED_TEXT,
+        )
+
+    @slow
+    @require_bitsandbytes
+    def test_small_model_integration_test_batch_different_resolutions(self):
+        model = LlavaOnevisionForConditionalGeneration.from_pretrained(
+            "llava-hf/llava-onevision-qwen2-0.5b-ov-hf", dtype="float16", device_map=torch_device
+        )
+
+        url = "http://images.cocodataset.org/val2017/000000039769.jpg"
+        lowres_url = "https://4.img-dpreview.com/files/p/TS560x560~forums/56876524/03975b28741443319e9a94615e35667e"
+        cats_image = Image.open(requests.get(url, stream=True).raw)
+        lowres_img = Image.open(requests.get(lowres_url, stream=True).raw)
+
+        inputs = self.processor(
+            text=[self.prompt_image, self.prompt_image],
+            images=[lowres_img, cats_image],
+            return_tensors="pt",
+            padding=True,
+        ).to(torch_device, torch.float16)
+
+        # verify generation
+        output = model.generate(**inputs, max_new_tokens=50)
+        EXPECTED_DECODED_TEXT = [
+            'user\n\nWhat do you see in this image?\nassistant\nThe image shows a scene of two deer in a grassy area with trees in the background. The weather appears to be foggy, giving the scene a misty and somewhat mysterious atmosphere. The deer are standing close to each other, possibly grazing or',
+            'user\n\nWhat do you see in this image?\nassistant\nIn the tranquil setting of this image, two cats are enjoying a peaceful nap on a vibrant pink blanket. The cat on the left, with its gray and black striped fur, is lying on its side, its head comfortably resting on the blanket. Its',
+        ]  # fmt: skip
+        self.assertEqual(
+            self.processor.batch_decode(output, skip_special_tokens=True),
+            EXPECTED_DECODED_TEXT,
+        )
+
+    @slow
+    @require_bitsandbytes
+    def test_small_model_integration_test_batch_matches_single(self):
+        model = LlavaOnevisionForConditionalGeneration.from_pretrained(
+            "llava-hf/llava-onevision-qwen2-0.5b-ov-hf",
+            dtype="float16",
+            device_map=torch_device,
+        )
+
+        url = "http://images.cocodataset.org/val2017/000000039769.jpg"
+        lowres_url = "https://4.img-dpreview.com/files/p/TS560x560~forums/56876524/03975b28741443319e9a94615e35667e"
+        cats_image = Image.open(requests.get(url, stream=True).raw)
+        lowres_img = Image.open(requests.get(lowres_url, stream=True).raw)
+
+        inputs_batched = self.processor(
+            text=[self.prompt_image, self.prompt_image],
+            images=[lowres_img, cats_image],
+            return_tensors="pt",
+            padding=True,
+        ).to(torch_device, torch.float16)
+
+        inputs_single = self.processor(
+            text=self.prompt_image, images=lowres_img, return_tensors="pt", padding=True
+        ).to(torch_device, torch.float16)
+
+        # verify generation
+        output_batched = model.generate(**inputs_batched, max_new_tokens=50)
+        output_single = model.generate(**inputs_single, max_new_tokens=50)
+
+        self.assertEqual(
+            self.processor.decode(output_batched[0], skip_special_tokens=True),
+            self.processor.decode(output_single[0], skip_special_tokens=True),
+        )