//计算部分区域颜色
public static Color GetMajorColor2(WriteableBitmap bitmap)
{
ImageBlur imageBlur = new ImageBlur(bitmap);
//色相数组
int[] majorHues = new int[361];
for (int i = 0; i < majorHues.Length; i++)
{
majorHues[i] = 0;
}
int sat_sum = 0;
int lig_sum = 0;
int hue_sum = 0;
int counts = 0;
//计算主色调
for (int h = 0; h < bitmap.PixelHeight; h++)
{
for (int w = 0; w < bitmap.PixelWidth; w++)
{
if (w > 880 & h < 40)
{
int hue = imageBlur.getPixelHue(w, h);
int sat = imageBlur.getPixelSat(w, h);
int lig = imageBlur.getPixelLig(w, h);
hue_sum += hue;
sat_sum += sat;
lig_sum += lig;
counts++;
}
}
}
double finLig1 = Math.Sqrt(lig_sum / (counts)) * 10;
int finSat2 = Convert.ToInt32(Math.Sqrt(sat_sum / (counts)) * 10);
int finLig2 = Convert.ToInt32(Math.Sqrt(lig_sum / (counts)) * 10);
int finLig = lig_sum / (counts);
int finSat = sat_sum / (counts);
int finHue = hue_sum / (counts);
ColorAbouts colorAbouts = new ColorAbouts();
ColorAbouts.RgbColor rgbColorMain = colorAbouts.HslToRgb(finHue, finSat2, finLig2);
Color myColor = Color.FromArgb(255,
Convert.ToByte(rgbColorMain.red),
Convert.ToByte(rgbColorMain.green),
Convert.ToByte(rgbColorMain.blue));
return(myColor);
}
protected float[] ConvertImageWithPadding(ImageBlur imageIn, int width, int height)
{
int newheight = height + Padding * 2;
int newwidth = width + Padding * 2;
float[] numArray = new float[(newheight * newwidth) * 3];
int index = 0;
int num = 0;
for (int i = -3; num < newheight; i++)
{
int y = i;
if (i < 0)
{
y = 0;
}
else if (i >= height)
{
y = height - 1;
}
int count = 0;
int negpadding = -1 * Padding;
while (count < newwidth)
{
int x = negpadding;
if (negpadding < 0)
{
x = 0;
}
else if (negpadding >= width)
{
x = width - 1;
}
numArray[index] = imageIn.getRComponent(x, y) * 0.003921569f;
numArray[index + 1] = imageIn.getGComponent(x, y) * 0.003921569f;
numArray[index + 2] = imageIn.getBComponent(x, y) * 0.003921569f;
count++; negpadding++;
index += 3;
}
num++;
}
return(numArray);
}
//@Override
public virtual ImageBlur process(ImageBlur imageIn)
{
int width = imageIn.getWidth();
int height = imageIn.getHeight();
float[] imageArray = ConvertImageWithPadding(imageIn, width, height);
imageArray = ApplyBlur(imageArray, width, height);
int newwidth = width + Padding * 2;
for (int i = 0; i < height; i++)
{
int num = ((i + 3) * newwidth) + 3;
for (int j = 0; j < width; j++)
{
int pos = (num + j) * 3;
imageIn.setPixelColor(j, i, (byte)(imageArray[pos] * 255f), (byte)(imageArray[pos + 1] * 255f), (byte)(imageArray[pos + 2] * 255f));
}
}
return(imageIn);
}
/// <summary>
///
/// </summary>
/// <param name="level">[0,40]</param>
public async Task <WriteableBitmap> ApplyFilter(float level)
{
#region old
/*
* using (IRandomAccessStream fileStream = await file.OpenAsync(FileAccessMode.Read))
* {
* BitmapDecoder decoder = await BitmapDecoder.CreateAsync(fileStream);
* // Scale image to appropriate size
* BitmapTransform transform = new BitmapTransform()
* {
* ScaledWidth = Convert.ToUInt32(wb.PixelWidth),
* ScaledHeight = Convert.ToUInt32(wb.PixelHeight)
* };
* PixelDataProvider pixelData = await decoder.GetPixelDataAsync(
* BitmapPixelFormat.Bgra8, // WriteableBitmap uses BGRA format
* BitmapAlphaMode.Straight,
* transform,
* ExifOrientationMode.IgnoreExifOrientation, // This sample ignores Exif orientation
* ColorManagementMode.DoNotColorManage
* );
*
*
*
* // An array containing the decoded image data, which could be modified before being displayed
* byte[] sourcePixels = pixelData.DetachPixelData();
* using (Stream stream = wb.PixelBuffer.AsStream())
* {
* await stream.WriteAsync(sourcePixels, 0, sourcePixels.Length);
* }
* }
*/
#endregion
// 拷贝
WriteableBitmap new_bitmap = await Utility.BitmapClone(wb);
// 添加高斯滤镜效果
ImageBlur mi = new ImageBlur(new_bitmap);
GaussianBlurFilter filter = new GaussianBlurFilter();
filter.Sigma = level;
filter.process(mi);
// 图片添加完滤镜的 int[] 数组
int[] array = mi.colorArray;
// byte[] 数组的长度是 int[] 数组的 4倍
byte[] result = new byte[array.Length * 4];
// 通过自加，来遍历 byte[] 数组中的值
int j = 0;
for (int i = 0; i < array.Length; i++)
{
// 同时把 int 值中 a、r、g、b 的排列方式，转换为 byte数组中 b、g、r、a 的存储方式
result[j++] = (byte)(array[i]); // Blue
result[j++] = (byte)(array[i] >> 8); // Green
result[j++] = (byte)(array[i] >> 16); // Red
result[j++] = (byte)(array[i] >> 24); // Alpha
}
// Open a stream to copy the image contents to the WriteableBitmap's pixel buffer
using (Stream stream = new_bitmap.PixelBuffer.AsStream())
{
await stream.WriteAsync(result, 0, result.Length);
}
return(new_bitmap);// 把 WriteableBitmap 对象赋值给 Image 控件
// 用像素缓冲区的数据绘制图片
//new_bitmap.Invalidate();
}
public static Color GetMajorColor(WriteableBitmap bitmap, StackPanel StatisticsGrid)
{
ImageBlur imageBlur = new ImageBlur(bitmap);
//色相数组
int[] majorHues = new int[361];
for (int i = 0; i < majorHues.Length; i++)
{
majorHues[i] = 0;
}
int[] majorSatCounts = new int[361];
for (int i = 0; i < majorSatCounts.Length; i++)
{
majorSatCounts[i] = 0;
}
double lum_sum = 0;
double imageCounts = 0;
int darkLumCounts = 0;
//计算主色调
for (int h = 0; h < bitmap.PixelHeight; h++)
{
for (int w = 0; w < bitmap.PixelWidth; w++)
{
int hue = imageBlur.getPixelHue(w, h);
int sat = imageBlur.getPixelSat(w, h);
int lum = imageBlur.getPixelLig(w, h);
imageCounts++;
lum_sum += lum;
if (lum > 10)
{
majorHues[hue] += sat;
majorSatCounts[hue]++;
}
else
{
darkLumCounts++;
}
}
}
//比较得到最多的色调
int hueMaxCounts = 0;
int hueMax = 0;
for (int i = 0; i < majorHues.Length; i++)
{
if (majorHues[i] > hueMaxCounts)
{
hueMaxCounts = majorHues[i];
hueMax = i;
}
}
int majorHue = hueMax;
int majorSat = majorHues[hueMax] / majorSatCounts[hueMax];
double majorLum = 0;
majorLum = lum_sum / 600000;
// double abcdef = 1 / 3;
// int balanceLum = Convert.ToInt32(Math.Pow((2500*majorLum) - 125000, abcdef) +50);
double aaaaaa = 1 / 2;
int balanceLum = Convert.ToInt32(Math.Pow(100 * majorLum, aaaaaa));
int balanceLum2 = Convert.ToInt32(majorLum);
ColorAbouts colorAbouts = new ColorAbouts();
ColorAbouts.RgbColor rgbColorMain = colorAbouts.HslToRgb(majorHue, majorSat, balanceLum2);
Color myColor = Color.FromArgb(255,
Convert.ToByte(rgbColorMain.red),
Convert.ToByte(rgbColorMain.green),
Convert.ToByte(rgbColorMain.blue));
StatisticsGrid.Children.Clear();
// 绘图部分
for (int i = 0; i < majorSatCounts.Length; i++)
{
ColorAbouts colorAbouts2 = new ColorAbouts();
int r = colorAbouts2.HslToRgb(i, 100, 100).red;
int g = colorAbouts2.HslToRgb(i, 100, 100).green;
int b = colorAbouts2.HslToRgb(i, 100, 100).blue;
SolidColorBrush solidColorBrush = new SolidColorBrush(Color.FromArgb(255, Convert.ToByte(r), Convert.ToByte(g), Convert.ToByte(b)));
var line1 = new Line
{
Stroke = solidColorBrush,
X2 = Math.Pow(majorHues[i], 0.45) //这里有个值太小然后闪退的问题，复现：丢一张纯色图进去
};
StatisticsGrid.Children.Add(line1);
}
//绘制背景
ColorAbouts colorAbouts3 = new ColorAbouts();
int r3 = colorAbouts3.HslToRgb(0, 0, balanceLum2).red;
int g3 = colorAbouts3.HslToRgb(0, 0, balanceLum2).green;
int b3 = colorAbouts3.HslToRgb(0, 0, balanceLum2).blue;
SolidColorBrush solidColorBrush2 = new SolidColorBrush(Color.FromArgb(255, Convert.ToByte(r3), Convert.ToByte(g3), Convert.ToByte(b3)));
StatisticsGrid.Background = solidColorBrush2;
return(myColor);
}