Accurate Optical Character Recognition (OCR) starts with perfectly aligned images. Skewed or rotated scans can significantly reduce OCR accuracy, making manual straightening a tedious and time-consuming task—especially when dealing with large batches of documents. To streamline this process, we can leverage the power of Aspose.Imaging for .NET to automatically deskew scanned images before feeding them into an OCR engine.

Real-World Problem

OCR engines require well-aligned images to achieve high accuracy in text recognition. Crooked scans often lead to missed characters or errors during the OCR process. Manually straightening each image is impractical and inefficient, especially for large volumes of documents.

Solution Overview

Using Aspose.Imaging for .NET, we can automate the deskewing process for scanned images. This ensures that all input images are perfectly aligned before being processed by an external OCR tool such as Tesseract or Aspose.OCR. The output images will be saved in a lossless format like PNG or TIFF to preserve quality.

Prerequisites

To get started, you need:

  1. Visual Studio 2019 or later
  2. .NET 6.0 or later (or .NET Framework 4.6.2+)
  3. Aspose.Imaging for .NET from NuGet
  4. A scanned document or image file (JPEG, PNG, TIFF, etc.)

You can install the Aspose.Imaging package via the NuGet Package Manager Console:

PM> Install-Package Aspose.Imaging

Code Example: Automating Deskewing of Scanned Images for

Below is a comprehensive C# code example that demonstrates how to deskew scanned images using Aspose.Imaging for .NET.

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