public override WriteableBitmap ApplyFunctionFilter(System.Windows.Media.Imaging.BitmapImage originalBitmapImage)
{
WriteableBitmap writableImage = new WriteableBitmap(originalBitmapImage);
byte[] byteArr = writableImage.WriteableBitMapImageToArray();
double pixel;
Offset = (100 + Offset) / 100.0;
for (int i = 0; i < byteArr.Length; i++)
{
pixel = ((double)byteArr[i]) / 255.0;
pixel -= 0.5;
pixel *= Offset;
pixel += 0.5;
pixel *= 255;
pixel = (pixel < 0 ? 0 : pixel);
pixel = (pixel > 255 ? 255 : pixel);
byteArr[i] = (byte)pixel;
}
WriteableBitmap result = originalBitmapImage.ByteArrayToWritableBitmap(byteArr);
return(result);
}
public override WriteableBitmap ApplyFunctionFilter(System.Windows.Media.Imaging.BitmapImage originalBitmapImage)
{
WriteableBitmap writableImage = new System.Windows.Media.Imaging.WriteableBitmap(originalBitmapImage);
byte[] byteArr = writableImage.WriteableBitMapImageToArray();
for (int i = 0; i < byteArr.Length; i++)
{
byteArr[i] = (byte)(255 - byteArr[i]);
}
WriteableBitmap result = originalBitmapImage.ByteArrayToWritableBitmap(byteArr);
return(result);
}
public override WriteableBitmap ApplyFunctionFilter(System.Windows.Media.Imaging.BitmapImage originalBitmapImage)
{
WriteableBitmap writableImage = new System.Windows.Media.Imaging.WriteableBitmap(originalBitmapImage);
byte[] byteArr = writableImage.WriteableBitMapImageToArray();
int num = 0;
for (int i = 0; i < byteArr.Length; i++)
{
num = (int)(byteArr[i]);
int val = (int)_customFunction[num] + (int)this.Offset;
val = (val < 0 ? 0 : val);
val = (val > 255 ? 255 : val);
byteArr[i] = (byte)(val);
}
WriteableBitmap result = originalBitmapImage.ByteArrayToWritableBitmap(byteArr);
return(result);
}
public override WriteableBitmap ApplyFunctionFilter(System.Windows.Media.Imaging.BitmapImage originalBitmapImage)
{
WriteableBitmap writableImage = new WriteableBitmap(originalBitmapImage);
byte[] byteArr = writableImage.WriteableBitMapImageToArray();
int num = 0;
for (int i = 0; i < byteArr.Length; i++)
{
num = (int)(byteArr[i] + this.Offset);
num = (num < 0 ? 0 : num);
num = (num > 255 ? 255 : num);
byteArr[i] = (byte)num;
}
WriteableBitmap result = originalBitmapImage.ByteArrayToWritableBitmap(byteArr);
return(result);
}
/*
* public override byte[] Function {
* get {
* byte[] function = new byte[256];
*
* int num = 0;
*
* int subvalues = 4;
* int length = 256 / subvalues;
* for (int i = 0; i * subvalues < length; i += subvalues) {
*
* int grayScalePx = (int)((i * .299) + ((i + 1) * .587) + ((i + 2) * .114));
*
* if (grayScalePx < this.Offset)
* num = 0;
* else
* num = 255;
*
* for (int j = i; j < (i + subvalues); j++) {
* function[j] = (byte)num;
* }
* }
*
* _function = function;
* return _function;
* }
* set {
* base.Function = value;
* }
* }
*/
public override WriteableBitmap ApplyFunctionFilter(System.Windows.Media.Imaging.BitmapImage originalBitmapImage)
{
WriteableBitmap writableImage = new System.Windows.Media.Imaging.WriteableBitmap(originalBitmapImage);
byte[] byteArr = writableImage.WriteableBitMapImageToArray();
for (int i = 0; i < byteArr.Length; i += 4)
{
byte a = byteArr[i + 3];
if (a > 0)
{
double ad = (double)a / 255.0;
double rd = (double)byteArr[i + 2] / ad;
double gd = (double)byteArr[i + 1] / ad;
double bd = (double)byteArr[i + 0] / ad;
double luminance = 0.2126 * rd + 0.7152 * gd + 0.0722 * bd;
double newR = luminance * ad;
if (newR < this.Offset)
{
newR = 0;
}
else
{
newR = 255;
}
byteArr[i + 0] = (byte)newR;
byteArr[i + 1] = (byte)newR;
byteArr[i + 2] = (byte)newR;
}
}
WriteableBitmap result = originalBitmapImage.ByteArrayToWritableBitmap(byteArr);
return(result);
}
