Image Deskew
How to Automate Deskewing and Export of Large Document Archives

How to Automate Deskewing and Export of Large Document Archives

Archiving and digitizing large collections of scanned images is daunting without automation. Aspose.Imaging for .NET streamlines the entire process—handling folders with thousands of files, deskewing, and exporting them in bulk, with robust error logging and output management.

Real-World Problem

Manual deskew and export for large-scale archives is not scalable. Organizations need fully automated solutions for business, legal, historical, or scientific digitization projects.

Solution Overview

Use a recursive batch script to process every supported image in all subfolders, log results, and export in the desired formats—without human intervention.

Prerequisites

  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. Source archive folder (local, network, or cloud-mapped)
PM> Install-Package Aspose.Imaging

Step-by-Step Implementation

Step 1: Recursively Find All Image Files 

string rootDir = "./archive_input";
string outputDir = "./archive_output";
Directory.CreateDirectory(outputDir);

// All supported types: jpg, png, tif, bmp, gif, etc.
var files = Directory.GetFiles(rootDir, "*.*", SearchOption.AllDirectories)
    .Where(f => f.EndsWith(".jpg", StringComparison.OrdinalIgnoreCase)
             || f.EndsWith(".jpeg", StringComparison.OrdinalIgnoreCase)
             || f.EndsWith(".png", StringComparison.OrdinalIgnoreCase)
             || f.EndsWith(".tif", StringComparison.OrdinalIgnoreCase)
             || f.EndsWith(".tiff", StringComparison.OrdinalIgnoreCase)
             || f.EndsWith(".bmp", StringComparison.OrdinalIgnoreCase)
             || f.EndsWith(".gif", StringComparison.OrdinalIgnoreCase))
    .ToArray();

Step 2: Batch Deskew and Export With Error Handling 

using Aspose.Imaging;
using Aspose.Imaging.ImageOptions;

List<string> failedFiles = new List<string>();
foreach (var file in files)
{
    try
    {
        using (var image = (RasterImage)Image.Load(file))
        {
            image.NormalizeAngle(false, Color.White);
            string relPath = Path.GetRelativePath(rootDir, file);
            string outPath = Path.Combine(outputDir, relPath);
            Directory.CreateDirectory(Path.GetDirectoryName(outPath));
            image.Save(outPath, new TiffOptions(TiffExpectedFormat.Default));
        }
    }
    catch (Exception ex)
    {
        failedFiles.Add($"{file}: {ex.Message}");
    }
}

// Save log for failed files
File.WriteAllLines(Path.Combine(outputDir, "deskew_failed_files.log"), failedFiles);

Step 3: Schedule and Monitor

Set up as a Windows Task Scheduler job or similar to run on new scans automatically.

Use Cases and Applications

  • Business/legal archives (contracts, case files)
  • Library and historical digitization
  • Scientific or research image collections
  • Ongoing scan projects for compliance or audit

Common Challenges and Solutions

Network interruptions: Process local copies and resync, or log and retry.

Large or corrupt files: Log, skip, and review failed items separately.

Mixed file formats: Filter or normalize during processing.

Best Practices

  • Keep logs for traceability
  • Backup originals before processing
  • Test on small batches before full archive

FAQ

Q: Can I process millions of files? A: Yes—scale by splitting jobs, running in parallel, or chunking folders.

Q: Can I use this with network drives or cloud-mapped folders? A: Yes, as long as the drive is accessible to the script.

Q: How do I keep the job running on new files? A: Use Task Scheduler or a continuous integration tool.

Conclusion

With Aspose.Imaging for .NET, even the largest archives can be deskewed and exported automatically. For more on scaling or customizing workflows, see the Aspose.Imaging for .NET API Reference .

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