///////////////////////////////////////////////////////////////////////////
// Use the Nokia Imaging SDK to apply a filter to a selected image
private async void AppBarBtnEdit_Click(object sender, RoutedEventArgs e)
{
progressRing.IsEnabled = true;
progressRing.IsActive = true;
progressRing.Visibility = Visibility.Visible;
// Create NOK Imaging SDK effects pipeline and run it
var imageStream = new BitmapImageSource(originalBitmap.AsBitmap());
using (var effect = new FilterEffect(imageStream))
{
var filter = new Lumia.Imaging.Adjustments.GrayscaleFilter();
effect.Filters = new[] { filter };
// Render the image to a WriteableBitmap.
var renderer = new WriteableBitmapRenderer(effect, originalBitmap);
editedBitmap = await renderer.RenderAsync();
editedBitmap.Invalidate();
}
Image.Source = originalBitmap;
Image.Visibility = Visibility.Collapsed;
//Resizing the editedBitmap to 128x128
var resized1 = editedBitmap.Resize(128, 128, Windows.UI.Xaml.Media.Imaging.WriteableBitmapExtensions.Interpolation.Bilinear);
//converting the editedBitmap to byte array
byte[] edit_arr = resized1.ToByteArray();
//obtaining the images folder
StorageFolder folder = Windows.ApplicationModel.Package.Current.InstalledLocation;
StorageFolder subfolder = await folder.GetFolderAsync("Images");
//create list of all the files in the images folder
var pictures = await subfolder.GetFilesAsync();
double ldiff = 50;//least percentage difference for an image to be a match
string dispText = "Try again";//default message to be displayed
byte threshold = 124;
//process through all images
foreach (var file in pictures)
{
if (file != null)
{
// Use WriteableBitmapEx to easily load image from a stream
using (var stream = await file.OpenReadAsync())
{
listBitmap = await new WriteableBitmap(1, 1).FromStream(stream);
stream.Dispose();
}
//convert obtained image to byte array
byte[] list_arr = listBitmap.ToByteArray();
byte[] difference = new byte[edit_arr.Length];
//compare byte array of both the images
for (int i=0;i<list_arr.Length;i++)
{
difference[i] = (byte)Math.Abs(edit_arr[i]-list_arr[i]);
}
//calculate percentage difference
int differentPixels = 0;
foreach(byte b in difference )
{
if (b > threshold)
differentPixels++;
}
double percentage = (double)differentPixels / (double)list_arr.Length;
percentage = percentage * 100;
if (percentage <= ldiff)
{
ldiff = percentage;
dispText =file.DisplayName;
}
}
}
tb.Text = dispText;
progressRing.IsEnabled = false;
progressRing.IsActive = false;
progressRing.Visibility = Visibility.Collapsed;
tb.Visibility = Visibility.Visible;
Image.Visibility = Visibility.Visible;
var tmp = new RenderTargetBitmap();
await tmp.RenderAsync(source);
var buffer = await tmp.GetPixelsAsync();
var width = tmp.PixelWidth;
var height = tmp.PixelHeight;
editedBitmap = await new WriteableBitmap(1, 1).FromPixelBuffer(buffer, width, height);
AppBarBtnSpeech.IsEnabled = true;
AppBarBtnSpeech.Visibility = Visibility.Visible;
AppBarBtnSave.IsEnabled = true;
}
///////////////////////////////////////////////////////////////////////////
// Use the Nokia Imaging SDK to apply a filter to a selected image
private async void AppBarBtnEdit_Click(object sender, RoutedEventArgs e)
{
progressRing.IsEnabled = true;
progressRing.IsActive = true;
progressRing.Visibility = Visibility.Visible;
// Create NOK Imaging SDK effects pipeline and run it
var imageStream = new BitmapImageSource(originalBitmap.AsBitmap());
using (var effect = new FilterEffect(imageStream))
{
var filter = new Lumia.Imaging.Adjustments.GrayscaleFilter();
effect.Filters = new[] { filter };
// Render the image to a WriteableBitmap.
var renderer = new WriteableBitmapRenderer(effect, originalBitmap);
editedBitmap = await renderer.RenderAsync();
editedBitmap.Invalidate();
}
Image.Source = originalBitmap;
Image.Visibility = Visibility.Collapsed;
//Resizing the editedBitmap to 128x128
var resized1 = editedBitmap.Resize(128, 128, Windows.UI.Xaml.Media.Imaging.WriteableBitmapExtensions.Interpolation.Bilinear);
//converting the editedBitmap to byte array
byte[] edit_arr = resized1.ToByteArray();
//obtaining the images folder
StorageFolder folder = Windows.ApplicationModel.Package.Current.InstalledLocation;
StorageFolder subfolder = await folder.GetFolderAsync("Images");
//create list of all the files in the images folder
var pictures = await subfolder.GetFilesAsync();
double ldiff = 50; //least percentage difference for an image to be a match
string dispText = "Try again"; //default message to be displayed
byte threshold = 124;
//process through all images
foreach (var file in pictures)
{
if (file != null)
{
// Use WriteableBitmapEx to easily load image from a stream
using (var stream = await file.OpenReadAsync())
{
listBitmap = await new WriteableBitmap(1, 1).FromStream(stream);
stream.Dispose();
}
//convert obtained image to byte array
byte[] list_arr = listBitmap.ToByteArray();
byte[] difference = new byte[edit_arr.Length];
//compare byte array of both the images
for (int i = 0; i < list_arr.Length; i++)
{
difference[i] = (byte)Math.Abs(edit_arr[i] - list_arr[i]);
}
//calculate percentage difference
int differentPixels = 0;
foreach (byte b in difference)
{
if (b > threshold)
{
differentPixels++;
}
}
double percentage = (double)differentPixels / (double)list_arr.Length;
percentage = percentage * 100;
if (percentage <= ldiff)
{
ldiff = percentage;
dispText = file.DisplayName;
}
}
}
tb.Text = dispText;
progressRing.IsEnabled = false;
progressRing.IsActive = false;
progressRing.Visibility = Visibility.Collapsed;
tb.Visibility = Visibility.Visible;
Image.Visibility = Visibility.Visible;
var tmp = new RenderTargetBitmap();
await tmp.RenderAsync(source);
var buffer = await tmp.GetPixelsAsync();
var width = tmp.PixelWidth;
var height = tmp.PixelHeight;
editedBitmap = await new WriteableBitmap(1, 1).FromPixelBuffer(buffer, width, height);
AppBarBtnSpeech.IsEnabled = true;
AppBarBtnSpeech.Visibility = Visibility.Visible;
AppBarBtnSave.IsEnabled = true;
}
