---
title: "PreprocessingSettings"
canonical_url: "https://www.nutrient.io/api/python/settings/vision/advanced/preprocessing-settings/"
md_url: "https://www.nutrient.io/api/python/settings/vision/advanced/preprocessing-settings.md"
last_updated: "2026-09-02T09:34:35.870Z"
description: "Settings for Preprocessing. Values fall back through three levels: document → SDK → built-in default."
---

Settings for Preprocessing. Values fall back through three levels: document → SDK → built-in default. Writes target the document only when set on a document's settings, otherwise the SDK globally when set on SdkSettings.

**Tags:** `Vision`, `Advanced`

```python

from nutrient_sdk import PreprocessingSettings

```

## Construction

`PreprocessingSettings` is accessed through a [`Document`](/api/python/document/) instance for per-document overrides, or via [`SdkSettings`](/api/python/settings/document/sdk-settings/) for SDK-wide defaults.

```python

# Per-document override

with Document.open("input.pdf") as doc:
    settings = doc.settings.preprocessing_settings
    settings.some_field = new_value          # mutate fields directly

# SDK-wide default (applies to all documents)

SdkSettings.preprocessing_settings.some_field = new_value

```

Settings are configured by writing to fields on the returned object. The settings property itself cannot be reassigned — `doc.settings.preprocessing_settings = other_settings` is rejected.

## Properties

### restoration_mode

```python

@property
def restoration_mode(self) -> RestorationMode

@restoration_mode.setter
def restoration_mode(self, value: RestorationMode) -> None

```

Controls optional page-image restoration before vision inference. Keep this disabled unless the pipeline is processing a photographed document page that needs restoration. In particular, use `Local` only for badly taken document photos, not for regular scans, screenshots, born-digital PDFs, or already flat images.

**Type:** [`RestorationMode`](/api/python/enums/restoration-mode/)

**Default:** `RestorationMode.Disabled`

---

---

## Related pages

- [Advanced](/api/python/settings/vision/advanced.md)
- [Per-document override](/api/python/settings/vision/advanced/ai-augmenter-settings.md)
- [Per-document override](/api/python/settings/vision/advanced/ai-processing-settings.md)
- [Per-document override](/api/python/settings/vision/advanced/anthropic-api-settings.md)
- [Per-document override](/api/python/settings/vision/advanced/claude-api-settings.md)
- [Per-document override](/api/python/settings/vision/advanced/content-extraction-settings.md)
- [Per-document override](/api/python/settings/vision/advanced/custom-vlm-api-settings.md)
- [Per-document override](/api/python/settings/vision/advanced/deskew-settings.md)
- [Per-document override](/api/python/settings/vision/advanced/document-layout-json-export-settings.md)
- [Per-document override](/api/python/settings/vision/advanced/finalizer-settings.md)
- [Per-document override](/api/python/settings/vision/advanced/form-labeling-settings.md)
- [Per-document override](/api/python/settings/vision/advanced/form-recognition-settings.md)
- [Per-document override](/api/python/settings/vision/advanced/google-api-settings.md)
- [Per-document override](/api/python/settings/vision/advanced/handwriting-settings.md)
- [Per-document override](/api/python/settings/vision/advanced/inference-layout-settings.md)
- [Per-document override](/api/python/settings/vision/advanced/local-vlm-settings.md)
- [Per-document override](/api/python/settings/vision/advanced/ocr-settings.md)
- [Per-document override](/api/python/settings/vision/advanced/omr-settings.md)
- [Per-document override](/api/python/settings/vision/advanced/open-ai-api-endpoint-settings.md)
- [Per-document override](/api/python/settings/vision/advanced/open-ai-languages-detection-settings.md)
- [Per-document override](/api/python/settings/vision/advanced/open-ai-picture-alt-settings.md)
- [Per-document override](/api/python/settings/vision/advanced/reading-order-settings.md)
- [Per-document override](/api/python/settings/vision/advanced/segmenter-settings.md)
- [Per-document override](/api/python/settings/vision/advanced/table-recognition-settings.md)
- [Per-document override](/api/python/settings/vision/advanced/vision-acceleration-settings.md)
- [Per-document override](/api/python/settings/vision/advanced/vision-descriptor-settings.md)
- [Per-document override](/api/python/settings/vision/advanced/words-detection-settings.md)