Reading 1D barcodes from images

This guide demonstrates how to read one-dimensional (1D) barcode values from an image.

Use this workflow when you need to:

• Extract product or shipment identifiers from barcode images
• Support inventory, checkout, or logistics pipelines
• Process one or more barcodes from a single file

Implementation

The workflow loads an image, runs a barcode scan, and reads detected values:

using GdPicture14;

LicenseManager licence = new LicenseManager();
licence.RegisterKEY(""); // Set a demo key

using GdPictureImaging imaging = new GdPictureImaging();
int imageId = imaging.CreateGdPictureImageFromFile(@"input_barcode_1d.png");
imaging.Barcode1DReaderDoScan(imageId);
int barcodesCount = imaging.Barcode1DReaderGetBarcodeCount();
string barcodeValue = imaging.Barcode1DReaderGetBarcodeValue(1);

Supported barcode types

The SDK supports common 1D formats, including:

• Code 128
• Code 39
• UPC-A and UPC-E
• EAN-13 and EAN-8
• Code 93
• Interleaved 2 of 5

Notes

• Use Barcode1DReaderGetBarcodeCount() to check how many barcodes the scan found.
• Use Barcode1DReaderGetBarcodeValue(index) to retrieve each barcode value by index.
• Add status checks in production code to handle image load and scan failures.

Conclusion

This workflow scans an image for 1D barcodes and reads decoded values for downstream business logic.