# HeatTok Semantic Patch Cache

Precomputed `.pt` caches for HeatTok. Use with `HEATTOK_SEMANTIC_CACHE_DIR=/path/to/cache`.

Filename pattern: `{image_hash}_g1_s28.pt` or `{image_hash}_g1_gd1_s28.pt`

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## semantic_patch_cache_vrsbench

- **Dataset:** VRSBench (512×512)
- Caches do **not** store precomputed global tokens or patch orientations.
- **Gaussian parameters** and patch metadata **are** stored.
- **No need to regenerate** `.pt` files — HeatTok computes global tokens and orientations online at load time.

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## semantic_patch_cache_earthvqa

- **Dataset:** EarthVQA (1024×1024)
- Caches use **global downsample divisor 1** (`gd1`).
- To use **divisor 8** (`gd8`), no regeneration needed — global branch is rebuilt online from the image processor.

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## Usage

```bash
export HEATTOK_SEMANTIC_CACHE_DIR=/path/to/semantic_patch_cache_vrsbench  # or earthvqa
```

```yaml
use_semantic_patches: true
global_downsample: true
semantic_patch_size: 28
```