/// <summary>
/// Adjusts contrast using memory-friendly Pipeline API
/// </summary>
private static void BrightnessContrastMemoryFriendly()
{
using (var reader = ImageReader.Create("../../../../_Input/Chicago.jpg"))
using (var brightnessContrast = new BrightnessContrast(0.1f, 0.2f))
using (var writer = ImageWriter.Create("../../../../_Output/BrightnessContrastMemoryFriendly.jpg"))
{
Pipeline.Run(reader + brightnessContrast + writer);
}
}
public IActionResult UpdateImage(int brightness, int contrast) //изменение яркости и контрастности
{
UInt32 p;
image = new Bitmap(ActionPictureController.pathImage);
// UInt32[,] pixel;
//получение матрицы с пикселями
pixel = new UInt32[image.Height, image.Width];
for (int y = 0; y < image.Height; y++)
{
for (int x = 0; x < image.Width; x++)
{
pixel[y, x] = (UInt32)(image.GetPixel(x, y).ToArgb());
}
}
//яркость
for (int i = 0; i < image.Height; i++)
{
for (int j = 0; j < image.Width; j++)
{
p = BrightnessContrast.Brightness(pixel[i, j], brightness, 10); //получение значения цвета пискеля
FromOnePixelToBitmap(i, j, p); //присвоение полученного цвета пикселю на картинке
pixel[i, j] = (UInt32)(image.GetPixel(j, i).ToArgb()); //занесение нового цвета пикселя в матрицу, т. е. сохранение
}
}
//контрастность
for (int i = 0; i < image.Height; i++)
{
for (int j = 0; j < image.Width; j++)
{
p = BrightnessContrast.Contrast(pixel[i, j], contrast, 10);
FromOnePixelToBitmap(i, j, p);
pixel[i, j] = (UInt32)(image.GetPixel(j, i).ToArgb());
}
}
bitmapBytes = BitmapToBytes(image);
image.Dispose();
string imreBase64Data = Convert.ToBase64String(bitmapBytes);
string imgDataURL = string.Format("data:image/jpeg;base64,{0}", imreBase64Data);
ViewBag.ImageData = imgDataURL;
return(View("~/Views/Home/UpdateImage.cshtml"));
}
/// <summary>
/// Apply the current text settings to the values
/// </summary>
/// <param name="values">values array to be used</param>
/// <returns>Array of strings from the values using the current settings</returns>
public string[] Apply(byte[,] values)
{
if (values == null)
{
return(null);
}
// only apply brightness and contrast if necessary
if (Brightness != 0 || Contrast != 0)
{
BrightnessContrast filter = new BrightnessContrast(IsBlackTextOnWhite ? Brightness : -Brightness,
IsBlackTextOnWhite ? Contrast : -Contrast);
values = filter.Apply(values);
}
if (Stretch)
{
Stretch filter = new Stretch();
values = filter.Apply(values);
}
if (Levels.Minimum != 0 || Levels.Maximum != 255 || Levels.Median != 0.5f)
{
//values = AscgenConverter.ApplyLevels(values, Levels.Minimum, Levels.Maximum, Levels.Median);
Levels filter = new Levels(Levels.Minimum, Levels.Maximum, Levels.Median);
values = filter.Apply(values);
}
if (Sharpen)
{
values = AsciiConverter.SharpenValues(values);
}
if (Unsharp)
{
values = AsciiConverter.UnsharpMaskValues(values, 3);
}
if (FlipHorizontally || FlipVertically)
{
Flip filter = new Flip(FlipHorizontally, FlipVertically);
values = filter.Apply(values);
}
return(_ValuesToText.Apply(values));
}
private void Contrast_ValueChanger(object sender, RoutedPropertyChangedEventArgs <double> e)
{
((Slider)sender).SelectionEnd = e.NewValue;
BrightnessContrast.ChangeContrastForTick(contrastSlider);
}
