private async Task RecognizeImageAsync()
{
while (_isRunning)
{
await Task.Delay(100);
}
if (this.Image1.Source == null)
{
return;
}
// 表示している画像を SoftwareBitmap として取得
UwpSoftwareBitmap bitmap
= await UwpSoftwareBitmapHelper.ConvertFrom(this.Image1.Source as BitmapFrame);
if (bitmap == null)
{
return;
}
// 認識言語を変えて再認識させたいときのために保持
if (_lastRecognizedBitmap != bitmap)
{
_lastRecognizedBitmap?.Dispose();
_lastRecognizedBitmap = bitmap;
}
// SoftwareBitmap を OCR に掛ける
await RecognizeBitmapAsync(bitmap);
}
public async Task RecognizeAsync(BitmapFrame bitmapFrame)
{
if (!CanExecute)
{
return;
}
ClearResults();
// SoftwareBitmapを取得
UwpSoftwareBitmap bitmap
= await UwpSoftwareBitmapHelper.ConvertFrom(bitmapFrame).ConfigureAwait(true);
if (bitmap == null)
{
return;
}
// OCR実行
UwpOcrResult ocrResult = await engine.RecognizeAsync(bitmap);
bitmap.Dispose();
// Angle
ocrAngle = ocrResult.TextAngle ?? 0.0;
// Line
foreach (var ocrLine in ocrResult.Lines)
{
WinOcrResult result = new WinOcrResult();
string words = "";
double left = ocrLine.Words[0].BoundingRect.Left;
double right = ocrLine.Words[0].BoundingRect.Right;
double top = ocrLine.Words[0].BoundingRect.Top;
double bottom = ocrLine.Words[0].BoundingRect.Bottom;
foreach (var word in ocrLine.Words)
{
words += word.Text;
if (word.BoundingRect.Left < left)
{
left = word.BoundingRect.Left;
}
if (right < word.BoundingRect.Right)
{
right = word.BoundingRect.Right;
}
if (word.BoundingRect.Top < top)
{
top = word.BoundingRect.Top;
}
if (bottom < word.BoundingRect.Bottom)
{
bottom = word.BoundingRect.Bottom;
}
}
result.Words = words;
result.RectLeft = left;
result.RectTop = top;
result.RectWidth = right - left;
result.RectHeight = bottom - top;
this.ocrResults.Add(result);
}
}