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Initial PTD model release

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README.md ADDED
@@ -0,0 +1,182 @@
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
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+ ---
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+ license: apache-2.0
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+ library_name: transformers
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+ pipeline_tag: image-text-to-text
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+ base_model: Qwen/Qwen3-VL-4B-Instruct
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+ language:
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+ - en
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+ tags:
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+ - qwen3-vl
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+ - video
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+ - video-grounding
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+ - spatio-temporal-video-grounding
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+ - temporal-localization
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+ - parallel-tube-decoding
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+ - ptd
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+ ---
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+
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+ # ParallelTubeDecoding-Qwen3-VL-4B
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+
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+ This repository contains the merged Qwen3-VL-4B checkpoint for **Parallel
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+ Tube Decoding (PTD)** from *Locate Anything in Videos: Rethinking Efficient
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+ Generative Spatio-Temporal Video Grounding*.
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+
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+ PTD first predicts the temporal interval of a queried event and then generates
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+ all time-conditioned spatial blocks in parallel. Decoupled Block Attention
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+ allows every spatial block to access the shared video-query context and the
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+ predicted temporal block while preventing dependencies between spatial
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+ blocks. The complete spatial tube is therefore produced in one parallel
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+ decoding round after temporal localization.
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+
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+ - **Code:** [mbzuai-oryx/ParallelTubeDecoding](https://github.com/mbzuai-oryx/ParallelTubeDecoding)
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+ - **Project page:** [Parallel Tube Decoding](https://mbzuai-oryx.github.io/parallel-tube-decoding/)
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+ - **Base model:** [Qwen/Qwen3-VL-4B-Instruct](https://huggingface.co/Qwen/Qwen3-VL-4B-Instruct)
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+
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+ ## Model details
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+
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+ - Backbone: Qwen3-VL-4B-Instruct
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+ - Method: Parallel Tube Decoding (PTD)
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+ - Tasks: spatio-temporal video grounding and temporal localization
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+ - Spatial representation: 1,001 discrete coordinate tokens over `[0, 1000]`
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+ - Temporal representation: 100 discrete time tokens
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+ - PTD spatial block size: 6
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+ - Checkpoint format: merged model weights in FP16
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+ - Transformers version: `5.12.1`
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+
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+ The checkpoint supports the released PTD inference path and Quantized (NTP)
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+ inference. It does not include data or a separate LoRA adapter.
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+
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+ ## Important loading note
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+
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+ Use this checkpoint with the released
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+ [ParallelTubeDecoding](https://github.com/mbzuai-oryx/ParallelTubeDecoding)
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+ code. Standard Transformers loading provides the Qwen3-VL architecture, but
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+ PTD generation and Decoupled Block Attention are implemented by the released
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+ codebase.
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+
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+ ```bash
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+ git clone https://github.com/mbzuai-oryx/ParallelTubeDecoding.git
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+ cd ParallelTubeDecoding
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+
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+ conda create -n ptd python=3.11 -y
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+ conda activate ptd
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+ pip install --upgrade pip
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+ pip install -r requirements.txt
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+ ```
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+
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+ The release uses:
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+
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+ ```text
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+ transformers==5.12.1
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+ ```
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+
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+ For evaluation, set the model path to this Hugging Face repository:
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+
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+ ```bash
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+ export MODEL="MBZUAI/ParallelTubeDecoding-Qwen3-VL-4B"
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+ ```
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+
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+ Then follow the repository's
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+ [evaluation instructions](https://github.com/mbzuai-oryx/ParallelTubeDecoding/blob/main/evaluation/README.md).
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+ The released adapter is based on `lmms-eval` v0.7.1 at commit
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+ `88b23e2bfa16a1edbc16e9e238ed82130b3a4f56`.
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+
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+ ## Evaluation configuration
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+
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+ The paper evaluation uses:
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+
88
+ ```text
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+ fps=2
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+ max_num_frames=64
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+ min_pixels=131072
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+ max_pixels=786432
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+ temporal_patch_size=1
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+ ```
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+
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+ For PTD inference, use:
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+
98
+ ```text
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+ attn_implementation=sdpa
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+ vision_attn_implementation=flash_attention_2
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+ ptd_attn_implementation=flash_attention_2
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+ ```
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+
104
+ Quantized (NTP) inference uses:
105
+
106
+ ```text
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+ attn_implementation=sdpa
108
+ ```
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+
110
+ FlashAttention-2 must match the installed PyTorch and CUDA/ROCm environment.
111
+
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+ ## Training
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+
114
+ The released model was trained in two stages:
115
+
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+ 1. Supervised fine-tuning with the joint NTP/MTP formulation on the training
117
+ splits of VidSTG and HC-STVG v1/v2.
118
+ 2. Localization-aware GRPO with temporal IoU and spatial GIoU/L1 rewards.
119
+
120
+ Both stages used LoRA with rank 32 and alpha 64 while optimizing the newly
121
+ introduced localization-token embeddings. The released checkpoint contains
122
+ the merged weights. Charades-STA and ActivityNet Captions were not used for
123
+ SFT; results on both are zero-shot.
124
+
125
+ The training video configuration was:
126
+
127
+ ```text
128
+ video_max_pixels=151200
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+ fps=2
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+ max_frames=64
131
+ temporal_patch_size=1
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+ ```
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+
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+ No training data, GRPO data, or GRPO data-selection code is included with the
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+ model release.
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+
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+ ## Results
138
+
139
+ PTD is evaluated on VidSTG, HC-STVG v1/v2, Charades-STA, and ActivityNet
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+ Captions. On the decoding-efficiency protocol, PTD achieves a Tube Completion
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+ Latency (TCL) of 0.4 seconds and 45.9 Boxes Per Second (BPS). Relative to
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+ unquantized autoregressive decoding, this corresponds to 79x lower TCL and 92x
143
+ higher BPS while improving grounding accuracy.
144
+
145
+ The efficiency measurements use BF16, batch size 1, and a single 64-GB AMD
146
+ Instinct MI210 GPU with synchronized decode-only timing. Refer to the paper and
147
+ project page for complete benchmark tables and comparisons.
148
+
149
+ ## Intended use
150
+
151
+ This model is intended for research on:
152
+
153
+ - spatio-temporal grounding of a referred entity in video;
154
+ - temporal localization of described events;
155
+ - efficient structured localization with PTD; and
156
+ - evaluation on VidSTG, HC-STVG, Charades-STA, and ActivityNet Captions.
157
+
158
+ Users are responsible for complying with the licenses and terms of the source
159
+ videos and evaluation datasets.
160
+
161
+ ## Limitations
162
+
163
+ The released formulation predicts one continuous temporal interval and one
164
+ spatial tube per query. It is not designed for multiple disjoint event
165
+ occurrences or multiple simultaneously valid instances. Temporally subtle
166
+ state changes can produce ambiguous boundaries, while small, fast-moving, or
167
+ occluded targets remain challenging.
168
+
169
+ ## Citation
170
+
171
+ ```bibtex
172
+ @misc{rasheed2026locateanythingvideos,
173
+ title = {Locate Anything in Videos: Rethinking Efficient Generative Spatio-Temporal Video Grounding},
174
+ author = {Hanoona Rasheed and Haania Siddiqui and Ming-Hsuan Yang and Fahad Shahbaz Khan and Salman Khan},
175
+ year = {2026}
176
+ }
177
+ ```
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+
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+ ## Acknowledgements
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+
181
+ This work builds on Qwen3-VL and the Qwen-VL-Series-Finetune training
182
+ framework. See the code repository for full acknowledgements.
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+ {{- '<|im_start|>user' }}
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+ {%- endif %}
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+ {{- '\n<tool_response>\n' }}
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+ {%- if message.content is string %}
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+ {{- message.content }}
97
+ {%- else %}
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+ {%- for content in message.content %}
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+ {%- if content.type == 'image' or 'image' in content or 'image_url' in content %}
100
+ {%- set image_count.value = image_count.value + 1 %}
101
+ {%- if add_vision_id %}Picture {{ image_count.value }}: {% endif -%}
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+ <|vision_start|><|image_pad|><|vision_end|>
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+ {%- elif content.type == 'video' or 'video' in content %}
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+ {%- set video_count.value = video_count.value + 1 %}
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+ {%- if add_vision_id %}Video {{ video_count.value }}: {% endif -%}
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+ <|vision_start|><|video_pad|><|vision_end|>
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+ {%- elif 'text' in content %}
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+ {{- content.text }}
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+ {%- endif %}
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+ {%- endfor %}
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+ {%- endif %}
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+ {{- '\n</tool_response>' }}
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+ {%- if loop.last or (messages[loop.index0 + 1].role != "tool") %}
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+ {{- '<|im_end|>\n' }}
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+ {%- endif %}
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+ {%- endif %}
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+ {%- endfor %}
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+ {%- if add_generation_prompt %}
119
+ {{- '<|im_start|>assistant\n' }}
120
+ {%- endif %}
config.json ADDED
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+ {
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+ "architectures": [
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+ "Qwen3VLForConditionalGeneration"
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+ ],
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+ "bos_token_id": null,
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+ "debug_nan_checks": false,
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+ "debug_nan_max_tensors": 5,
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+ "dtype": "float16",
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+ "eos_token_id": 151645,
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+ "force_vision_tower_fp32": false,
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+ "image_token_id": 151655,
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+ "model_type": "qwen3_vl",
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+ "ptd_block_size": 6,
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+ "ptd_num_time_tokens": 100,
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+ "pad_token_id": 151643,
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+ "text_config": {
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+ "attention_bias": false,
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+ "attention_dropout": 0.0,
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+ "bos_token_id": 151643,
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+ "dtype": "float16",
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+ "eos_token_id": 151645,
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+ "head_dim": 128,
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+ "hidden_act": "silu",
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+ "hidden_size": 2560,
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+ "initializer_range": 0.02,
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+ "intermediate_size": 9728,
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+ "max_position_embeddings": 262144,
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+ "model_type": "qwen3_vl_text",
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+ "num_attention_heads": 32,
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+ "num_hidden_layers": 36,
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+ "num_key_value_heads": 8,
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+ "pad_token_id": null,
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+ "rms_norm_eps": 1e-06,
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+ "rope_parameters": {
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+ "mrope_interleaved": true,
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+ "mrope_section": [
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+ 24,
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+ 20,
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+ 20
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+ ],
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+ "rope_theta": 5000000,
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+ "rope_type": "default"
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+ },
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+ "tie_word_embeddings": true,
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+ "use_cache": true,
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+ "vocab_size": 152775
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+ },
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+ "tie_word_embeddings": true,
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+ "transformers_version": "5.12.1",
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+ "video_token_id": 151656,
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+ "vision_config": {
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+ "deepstack_visual_indexes": [
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+ 5,
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+ 11,
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+ 17
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+ ],
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+ "depth": 24,
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+ "dtype": "float16",
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+ "hidden_act": "gelu_pytorch_tanh",
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+ "hidden_size": 1024,
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+ "in_channels": 3,
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+ "initializer_range": 0.02,
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+ "intermediate_size": 4096,
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+ "model_type": "qwen3_vl_vision",
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+ "num_heads": 16,
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+ "num_position_embeddings": 2304,
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+ "out_hidden_size": 2560,
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+ "patch_size": 16,
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+ "spatial_merge_size": 2,
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+ "temporal_patch_size": 2
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+ },
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+ "vision_end_token_id": 151653,
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+ "vision_start_token_id": 151652
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+ }
generation_config.json ADDED
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+ {
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+ "bos_token_id": 151643,
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+ "do_sample": true,
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+ "eos_token_id": [
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+ 151645,
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+ 151643
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+ ],
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+ "pad_token_id": 151643,
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+ "repetition_penalty": 1.0,
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+ "temperature": 0.7,
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+ "top_k": 20,
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+ "top_p": 0.8,
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+ "transformers_version": "5.12.1"
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+ }
model.safetensors ADDED
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+ version https://git-lfs.github.com/spec/v1
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+ size 8880014376
processor_config.json ADDED
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+ {
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+ "image_processor": {
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+ "do_convert_rgb": true,
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+ "do_normalize": true,
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+ "do_rescale": true,
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+ "do_resize": true,
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+ "image_mean": [
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+ 0.5,
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+ 0.5,
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+ 0.5
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+ ],
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+ "image_processor_type": "Qwen2VLImageProcessor",
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+ "image_std": [
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+ 0.5,
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+ 0.5,
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+ 0.5
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+ ],
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+ "merge_size": 2,
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+ "patch_size": 16,
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+ "resample": 3,
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+ "rescale_factor": 0.00392156862745098,
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+ "size": {
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+ "longest_edge": 16777216,
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+ "shortest_edge": 65536
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+ },
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+ "temporal_patch_size": 2
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+ },
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+ "processor_class": "Qwen3VLProcessor",
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+ "video_processor": {
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+ "do_convert_rgb": true,
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+ "do_normalize": true,
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+ "do_rescale": true,
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+ "do_resize": true,
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+ "do_sample_frames": true,
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+ "fps": 2,
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+ "image_mean": [
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+ 0.5,
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+ 0.5,
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+ 0.5
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+ ],
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+ "image_std": [
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+ 0.5,
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+ 0.5,
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+ ],
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+ "max_frames": 768,
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+ "merge_size": 2,
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+ "min_frames": 4,
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+ "patch_size": 16,
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+ "resample": 3,
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+ "rescale_factor": 0.00392156862745098,
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+ "return_metadata": false,
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+ "size": {
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+ "longest_edge": 25165824,
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+ "shortest_edge": 4096
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+ },
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+ "temporal_patch_size": 2,
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+ "video_processor_type": "Qwen3VLVideoProcessor"
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+ }
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+ }
tokenizer.json ADDED
@@ -0,0 +1,3 @@
 
 
 
 
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+ version https://git-lfs.github.com/spec/v1
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+ oid sha256:a043d187c5d9c1d62fd57444cae67aa3279a154e5a044367e82a0a23c6c8c7ac
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+ size 11624948
tokenizer_config.json ADDED
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+ {
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+ "add_prefix_space": false,
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+ "backend": "tokenizers",
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+ "bos_token": null,
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+ "clean_up_tokenization_spaces": false,
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+ "eos_token": "<|im_end|>",
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+ "errors": "replace",
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+ "extra_special_tokens": [
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+ "<|im_start|>",
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+ "<|im_end|>",
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+ "<|object_ref_start|>",
12
+ "<|object_ref_end|>",
13
+ "<|box_start|>",
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+ "<|box_end|>",
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+ "<|quad_start|>",
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+ "<|quad_end|>",
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+ "<|vision_start|>",
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+ "<|vision_end|>",
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+ "<|vision_pad|>",
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+ "<|image_pad|>",
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+ "<|video_pad|>"
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+ ],
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+ "is_local": true,
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+ "local_files_only": false,
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+ "model_max_length": 262144,
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+ "pad_token": "<|endoftext|>",
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+ "processor_class": "Qwen3VLProcessor",
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+ "split_special_tokens": false,
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+ "tokenizer_class": "Qwen2Tokenizer",
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+ "unk_token": null
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+ }