public override PageRect OcrAnalyze(Stream stream)
{
var imageStream = new MemoryStream();
stream.CopyTo(imageStream);
imageStream.Position = 0;
stream.Position = 0;
var createAsyncTask = BitmapDecoder.CreateAsync(imageStream.AsRandomAccessStream()).AsTask();
createAsyncTask.Wait();
var bitmapDecoder = createAsyncTask.Result;
var getSoftwareBitmapAsyncTask = bitmapDecoder.GetSoftwareBitmapAsync(BitmapPixelFormat.Bgra8,
BitmapAlphaMode.Premultiplied).AsTask();
getSoftwareBitmapAsyncTask.Wait();
SoftwareBitmap softwareBitmap = getSoftwareBitmapAsyncTask.Result;
var memoryStream = new MemoryStream();
stream.CopyTo(memoryStream);
stream.Position = 0;
memoryStream.Position = 0;
var client = new AmazonTextractClient(AWSAccessKeyId, AWSSecretKey, RegionEndpoint.USEast1);
var detectDocumentTextTask = client.DetectDocumentTextAsync(new Amazon.Textract.Model.DetectDocumentTextRequest
{
Document = new Amazon.Textract.Model.Document {
Bytes = memoryStream
}
});
detectDocumentTextTask.Wait();
var pageRect = new PageRect {
Height = softwareBitmap.PixelHeight,
Width = softwareBitmap.PixelWidth,
LineTexts = detectDocumentTextTask.Result.Blocks.Where(block => block.BlockType == BlockType.LINE).Select(block =>
{
return(new LineText
{
Text = block.Text,
X = (int)(softwareBitmap.PixelWidth * block.Geometry.BoundingBox.Left),
Y = (int)(softwareBitmap.PixelHeight * block.Geometry.BoundingBox.Top)
});
}).ToList()
};
return(pageRect);
}
private static async Task <string> ReadText(string textUrl)
{
using var client = new AmazonTextractClient();
var document = new Document
{
S3Object = new Amazon.Textract.Model.S3Object
{
Bucket = S3BucketName,
Name = textUrl
}
};
var request = new DetectDocumentTextRequest
{
Document = document
};
var response = await client.DetectDocumentTextAsync(request);
return(GetTextFromBlocks(response.Blocks));
}
private async Task <DetectDocumentTextResponse> UploadImageForRekognition(AmazonTextractClient objRekClient, DetectDocumentTextRequest objDetectText)
{
return(await objRekClient.DetectDocumentTextAsync(objDetectText));
}