Reading text from images

This guide demonstrates how to extract text from an image using OCR.

Use this workflow when you need to:

• Convert image-based text into editable text output
• Index scanned content for search
• Feed OCR output into validation or automation pipelines

Project setup

Install:

• The core Nutrient Native SDK package
• GdPicture.Resources for OCR language resources

Prepare the project

Register the SDK license before running OCR operations. For setup details, refer to the getting started with .NET SDK guide.

using GdPicture14;

LicenseManager licence = new LicenseManager();
licence.RegisterKEY(""); // Set your license key

Load and prepare the image

Create imaging and OCR instances, load the source image, and set it for OCR:

using GdPictureImaging imaging = new GdPictureImaging();
using GdPictureOCR ocr = new GdPictureOCR();

// Load the image containing text to be extracted
int imageId = imaging.CreateGdPictureImageFromFile(@"input.png");

// Apply the image to the OCR engine for processing
ocr.SetImage(imageId);

Run text recognition

Execute OCR and read the recognized text result:

// Run OCR analysis to identify and extract text
string ocrResultId = ocr.RunOCR(OCRSpecialContext.None);

// Retrieve the recognized text content
string result = ocr.GetOCRResultText(ocrResultId);

Save extracted text

Write OCR output to a text file:

// Save the extracted text to a file
File.WriteAllText(@"output.txt", result);

Additional OCR options

Extend this workflow with:

• Language-specific OCR configuration for targeted recognition
• Confidence-based review logic
• Region-based OCR for specific image areas
• Layout-aware post-processing for structured documents

Conclusion

This workflow extracts text from an image and saves it as plain text for downstream processing.