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Aspose.OCR for .NET 22.12.0 - Release Notes
This article contains a summary of recent changes, enhancements and bug fixes in Aspose.OCR for .NET 22.12.0 (December 2022) release.
GPU version: 21.6.0
What was changed
Key | Summary | Category |
---|---|---|
OCRNET-608 | Added ID card recognition. | New feature |
OCRNET-609 | Added passport recognition. | New feature |
OCRNET-606 | Added vehicle license plate recognition. | New feature |
OCRNET-610 | Added invoice recognition. | New feature |
OCRNET-617 | Added methods for comparing image texts. | New feature |
OCRNET-618 | Added a method for searching for a fragment of text in an image. | New feature |
OCRNET-619 | Added a method to match image text with a regular expression. | New feature |
OCRNET-621 | The first line is missing when saving OCR results as a searchable PDF file. | Fix |
Public API changes and backwards compatibility
This section lists all public API changes introduced in Aspose.OCR for .NET 22.12.0 that may affect the code of existing applications.
Added public APIs:
The following public APIs have been introduced in this release:
RecognizeIDCard
This method extracts content from an ID card provided as an image file or as a MemoryStream
object.
IDCardRecognitionSettings
An object containing recognition settings which is specifically tailored for ID card recognition.
RecognizePassport
This method extracts content from a passport provided as an image files or as a MemoryStream
object.
PassportRecognitionSettings
An object containing recognition settings which is specifically tailored for passport recognition.
RecognizeCarPlate
This method extracts content from a vehicle license plate provided as an image file or as a MemoryStream
object.
CarPlateRecognitionSettings
An object containing recognition settings which is specifically tailored for vehicle license plate recognition.
RecognizeInvoice
This method extracts content from an invoice provided as an image file or as a MemoryStream
object.
InvoiceRecognitionSettings
An object containing recognition settings which is specifically tailored for invoice recognition.
CompareImageTexts
This method checks if two images contain the same text (case sensitive or case insensitive).
ImageTextDiff
This method compares the texts on the two images and returns a number representing how similar they are.
The text distance is returned as a floating point value from 0 to 1 indicating the percentage of similarity between texts. 0 means that the texts are completely different and 1 (100%) means the texts are identical.
ImageHasText
This method checks if the image contains the provided text fragment. The text can be represented as a case-sensitive or case-insensitive string, or as a regular expression object.
Updated public APIs:
No changes.
Removed public APIs:
No changes.
Usage examples
The examples below illustrates the changes introduced in this release:
Recognize ID card
Aspose.OCR.AsposeOcr recognitionEngine = new Aspose.OCR.AsposeOcr();
Aspose.OCR.IDCardRecognitionSettings recognitionSettings = new Aspose.OCR.IDCardRecognitionSettings();
recognitionSettings.Language = Aspose.OCR.Language.Ukr;
Aspose.OCR.RecognitionResult result = recognitionEngine.RecognizeIDCard("id-card.jpg", recognitionSettings);
Console.WriteLine(result.RecognitionText);
Recognize passport
Aspose.OCR.AsposeOcr recognitionEngine = new Aspose.OCR.AsposeOcr();
Aspose.OCR.PassportRecognitionSettings recognitionSettings = new Aspose.OCR.PassportRecognitionSettings();
recognitionSettings.Language = Aspose.OCR.Language.Ukr;
Aspose.OCR.RecognitionResult result = recognitionEngine.RecognizePassport("passport.jpg", recognitionSettings);
Console.WriteLine(result.RecognitionText);
Recognize vehicle license plate
Aspose.OCR.AsposeOcr recognitionEngine = new Aspose.OCR.AsposeOcr();
Aspose.OCR.CarPlateRecognitionSettings recognitionSettings = new Aspose.OCR.CarPlateRecognitionSettings();
Aspose.OCR.RecognitionResult result = recognitionEngine.RecognizeCarPlate("car.jpg", recognitionSettings);
Console.WriteLine(result.RecognitionText);
Recognize invoice
Aspose.OCR.AsposeOcr recognitionEngine = new Aspose.OCR.AsposeOcr();
Aspose.OCR.InvoiceRecognitionSettings recognitionSettings = new Aspose.OCR.InvoiceRecognitionSettings();
recognitionSettings.Language = Aspose.OCR.Language.Ukr;
Aspose.OCR.RecognitionResult result = recognitionEngine.RecognizeInvoice("invoice.jpg", recognitionSettings);
Console.WriteLine(result.RecognitionText);
Compare two images
Aspose.OCR.AsposeOcr recognitionEngine = new Aspose.OCR.AsposeOcr();
Aspose.OCR.RecognitionSettings recognitionSettings = new Aspose.OCR.RecognitionSettings();
recognitionSettings.AutoDenoising = true;
// case-insensitive comparison of image texts
if(!recognitionEngine.CompareImageTexts("image1.png", "image2.png", recognitionSettings, true))
{
Console.WriteLine("Images contain the same text");
}
// percentage of similarity between texts
else
{
float distance = recognitionEngine.ImageTextDiff("image1.png", "image2.png", recognitionSettings, true);
Console.WriteLine($"The image texts are {distance*100}% similar");
}
Find text on image
Aspose.OCR.AsposeOcr recognitionEngine = new Aspose.OCR.AsposeOcr();
Aspose.OCR.RecognitionSettings recognitionSettings = new Aspose.OCR.RecognitionSettings();
recognitionSettings.Language = Aspose.OCR.Language.Ukr;
if(recognitionEngine.ImageHasText("source.png", "Aspose", recognitionSettings))
{
Console.WriteLine(@"The image contains the word ""Aspose""");
}
else
{
Console.WriteLine(@"The image doesn't contain the word ""Aspose""");
}