public void ConvertToGrayScale(string sourceFile, string targetFile)
{
MultiFramedImageEncoder encoder = new TiffEncoder();
using (ImageSource src = new FileSystemImageSource(sourceFile, true))
{
ImageCollection images = new ImageCollection();
while (src.HasMoreImages())
{
AtalaImage img = src.AcquireNext();
img = img.GetChangedPixelFormat(PixelFormat.Pixel8bppGrayscale);
images.Add(img);
//img.Dispose();
}
using (Stream s = File.Create(targetFile))
{
encoder.Save(s, images, null);
}
}
}
// This method does the actual translation into text.
private void DoTranslation()
{
if (!_fileLoaded)
{
MessageBox.Show("No file loaded... Please open a file and try again.");
}
else
{
try
{
_textBox.Clear();
// choose output file location, either a temp directory, or a user selected spot.
if (_saveToFile)
{
_outputFile = GetSaveFileName();
}
if (_outputFile == null)
{
return;
}
// delete the output file if one already exists
if (File.Exists(_outputFile))
{
File.Delete(_outputFile);
}
// OK, we're committed, put up the wait cursor
UseWaitCursor = true;
Cursor.Current = Cursors.WaitCursor;
// this is how the image should be passed to the translator
var imageSource = new FileSystemImageSource(TempDir, true);
_progressBar.Value = 0;
// do the actual translation here. The text is saved as a file in _outputFile.
_engine.Translate(imageSource, _selectedMimeType, _outputFile);
if (!_saveToFile)
{
// Load the text back into the text box for display.
var input = new StreamReader(_outputFile);
var oneLine = input.ReadLine();
while (oneLine != null)
{
_textBox.AppendText(oneLine);
oneLine = input.ReadLine();
}
input.Close();
}
else
{
Process.Start(_outputFile);
}
}
catch (Exception ex)
{
// if it's a license exception, it's probably because of pdfTranslator
if ((ex is AtalasoftLicenseException) && (_selectedMimeType == "application/pdf"))
{
LicenseCheckFailure(
"To generate PDF output, an Atalasoft PDF Translator license is required.",
ex.Message);
}
else
{
InfoBox(ex.ToString());
}
}
finally
{
UseWaitCursor = false;
_progressBar.Hide();
}
}
}
