本文整理汇总了C#中Android.Graphics.Bitmap.Copy方法的典型用法代码示例。如果您正苦于以下问题：C# Bitmap.Copy方法的具体用法？C# Bitmap.Copy怎么用？C# Bitmap.Copy使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类Android.Graphics.Bitmap的用法示例。
在下文中一共展示了Bitmap.Copy方法的4个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C#代码示例。
示例1: Binarize
public static Bitmap Binarize(Bitmap bm, double threshhold)
{
//Binarize
int size = bm.Width * bm.Height;
int[] pixels = new int[size];
bm.GetPixels( pixels, 0, bm.Width, 0, 0, bm.Width, bm.Height );
// Calculate overall lightness of image
int c;
for (int i = 0; i < size; i++)
{
c = pixels[i];
double whiteDist = Math.Sqrt(Math.Pow(0xff - ((c&0x00FF0000 )>>16),2) + Math.Pow(0xff - ((c & 0x0000FF00 )>>8), 2) + Math.Pow(0xff - (c&0x000000FF), 2));
double blackDist = Math.Sqrt(Math.Pow(0x00 - ((c&0x00FF0000 )>>16),2) + Math.Pow(0x00 - ((c & 0x0000FF00 )>>8), 2) + Math.Pow(0x00 - (c&0x000000FF), 2));
double distance = blackDist + whiteDist;
if (whiteDist / distance > threshhold / 30.0) {
pixels [i] = Color.Black;
} else {
pixels [i] = Color.White;
}
}
Bitmap newBitmap = bm.Copy (bm.GetConfig (), true);
newBitmap.SetPixels (pixels, 0, bm.Width, 0, 0, bm.Width, bm.Height);
return newBitmap;
}示例2: ToLegacyBlurred
// Source: http://incubator.quasimondo.com/processing/superfast_blur.php
public static Bitmap ToLegacyBlurred(Bitmap source, Context context, int radius)
{
Bitmap img = source.Copy(source.GetConfig(), true);
int w = img.Width;
int h = img.Height;
int wm = w-1;
int hm = h-1;
int wh = w*h;
int div = radius+radius+1;
int[] r = new int[wh];
int[] g = new int[wh];
int[] b = new int[wh];
int rsum,gsum,bsum,x,y,i,p,p1,p2,yp,yi,yw;
int[] vmin = new int[Math.Max(w,h)];
int[] vmax = new int[Math.Max(w,h)];
int[] pix= new int[w*h];
img.GetPixels(pix, 0, w, 0,0,w, h);
int[] dv = new int[256*div];
for (i=0;i<256*div;i++){
dv[i]=(i/div);
}
yw=yi=0;
for (y=0;y<h;y++){
rsum=gsum=bsum=0;
for(i=-radius;i<=radius;i++){
p=pix[yi+Math.Min(wm,Math.Max(i,0))];
rsum+=(p & 0xff0000)>>16;
gsum+=(p & 0x00ff00)>>8;
bsum+= p & 0x0000ff;
}
for (x=0;x<w;x++){
r[yi]=dv[rsum];
g[yi]=dv[gsum];
b[yi]=dv[bsum];
if(y==0){
vmin[x]=Math.Min(x+radius+1,wm);
vmax[x]=Math.Max(x-radius,0);
}
p1=pix[yw+vmin[x]];
p2=pix[yw+vmax[x]];
rsum+=((p1 & 0xff0000)-(p2 & 0xff0000))>>16;
gsum+=((p1 & 0x00ff00)-(p2 & 0x00ff00))>>8;
bsum+= (p1 & 0x0000ff)-(p2 & 0x0000ff);
yi++;
}
yw+=w;
}
for (x=0;x<w;x++){
rsum=gsum=bsum=0;
yp=-radius*w;
for(i=-radius;i<=radius;i++){
yi=Math.Max(0,yp)+x;
rsum+=r[yi];
gsum+=g[yi];
bsum+=b[yi];
yp+=w;
}
yi=x;
for (y=0;y<h;y++){
// Preserve alpha channel: ( 0xff000000 & pix[yi] )
pix[yi] = (int)((0xff000000 & pix[yi]) | (dv[rsum] << 16) | (dv[gsum] << 8) | dv[bsum]);
if(x==0){
vmin[y]=Math.Min(y+radius+1,hm)*w;
vmax[y]=Math.Max(y-radius,0)*w;
}
p1=x+vmin[y];
p2=x+vmax[y];
rsum+=r[p1]-r[p2];
gsum+=g[p1]-g[p2];
bsum+=b[p1]-b[p2];
yi+=w;
}
}
img.SetPixels(pix,0, w,0,0,w,h);
return img;
}示例3: drawFaceRectanglesOnBitmap
/// <summary>
/// Mark bitmap with given face information
/// </summary>
/// <param name="originalBitmap"></param>
/// <param name="faces"></param>
/// <returns></returns>
private static Bitmap drawFaceRectanglesOnBitmap(Bitmap originalBitmap, Face[] faces)
{
Bitmap bitmap = originalBitmap.Copy(Bitmap.Config.Argb8888, true);
Canvas canvas = new Canvas(bitmap);
Paint paint = new Paint();
paint.Color = StrokeColor;
paint.StrokeWidth = strokeWidth;
paint.TextSize = textSize;
if (faces != null)
{
foreach(Face face in faces)
{
FaceRectangle faceRectangle = face.FaceRectangle;
paint.SetStyle(Paint.Style.Stroke);
canvas.DrawRect(
faceRectangle.Left,
faceRectangle.Top,
faceRectangle.Left + faceRectangle.Width,
faceRectangle.Top + faceRectangle.Height,
paint);
paint.SetStyle(Paint.Style.Fill);
canvas.DrawText(face.Attributes.Gender + ", " +
face.Attributes.Age + " y/o",
faceRectangle.Left, faceRectangle.Top - textSize, paint);
}
}
return bitmap;
}示例4: ChangeColor
private static Bitmap ChangeColor(Bitmap bitmap, Color fromColor, Color targetColor, float tolerance = 20)
{
int width = bitmap.Width;
int height = bitmap.Height;
int[] pixels = new int[width * height];
float[] redRange = new float[2]{
(float)Math.Max(fromColor.R - (tolerance / 2), 0.0),
(float)Math.Min(fromColor.R + (tolerance / 2), 255.0)};
float[] greenRange = new float[2]{
(float)Math.Max(fromColor.G - (tolerance / 2), 0.0),
(float)Math.Min(fromColor.G + (tolerance / 2), 255.0)};
float[] blueRange = new float[2]{
(float)Math.Max(fromColor.B - (tolerance / 2), 0.0),
(float)Math.Min(fromColor.B + (tolerance / 2), 255.0)};
bitmap.GetPixels(pixels, 0, width, 0, 0, width, height);
for (int i = 0; i < pixels.Length; i++)
{
if (pixels[i] == fromColor)
{
pixels[i] = new Color(targetColor.R, targetColor.G, targetColor.B, targetColor.A - 1);
}
int red = Color.GetRedComponent(pixels[i]);
int green = Color.GetGreenComponent(pixels[i]);
int blue = Color.GetBlueComponent(pixels[i]);
int alpha = Color.GetAlphaComponent(pixels[i]);
if (((red >= redRange[0]) && (red <= redRange[1])) &&
((green >= greenRange[0]) && (green <= greenRange[1])) &&
((blue >= blueRange[0]) && (blue <= blueRange[1])) &&
((alpha > 0 && alpha < 254)))
{
pixels[i] = new Color(targetColor.R, targetColor.G, targetColor.B, targetColor.A - 1);
}
}
if (bitmap.IsMutable)
{
bitmap.SetPixels(pixels, 0, width, 0, 0, width, height);
return bitmap;
}
else
{
var mutableBitmap = bitmap.Copy(bitmap.GetConfig(), true);
mutableBitmap.SetPixels(pixels, 0, width, 0, 0, width, height);
return mutableBitmap;
}
}