Parametric image filters supported by the iOS Document Scanner SDK

Overview

You can enhance your scanned pages or raw images by applying a variety of filters and rotation adjustments. This improves their readability for humans and machines alike and streamlines further processing in your backend.

List of available filters

You can try out the SDK's image filters in your browser with this web demo to experience how they work in real-time.

Here is the complete list of all the supported filters:

• Color Document Filter: Color document filter. This filter is a good starting point for most use cases.
• Scanbot Binarization Filter: Automatic binarization filter. This filter is a good starting point for most use cases. It has an OutputMode parameter that can be set to binary or antialiased.
• Custom Binarization Filter: Customizable binarization filter. It has a few presets for specific use cases:
  • Binarization Filter Preset.preset1: Usually performs well if there are no shadows.
  • Binarization Filter Preset.preset2, Binarization Filter Preset.preset3, Binarization Filter Preset.preset4: Usually perform well even if there are shadows.
• Brightness Filter: Filter for adjusting the image's brightness.
• Contrast Filter: Filter for adjusting the image's contrast.
• Grayscale Filter: Converts color images to grayscale, optionally applying auto-contrast.
• White Black Point Filter: Maps the image value channel so that all the pixels darker than the black point are set to 0, all the pixels brighter than the white point are set to 255, and the pixels in between are linearly scaled.

Want to scan longer than one minute?

Generate a free trial license to test the Scanbot SDK thoroughly.

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Scanbot SDK is part of the Apryse SDK product family

A mobile scan is just the start. With Apryse SDKs, you can expand mobile workflows into full cross‑platform document processing. Whether you need to edit PDFs, add secure digital signatures, or use a fast, customizable document viewer and editor, Apryse gives you the tools to build powerful features quickly.

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