我正在尝试将功能齐全的桌面应用程序之一转换为 Windows 手机应用程序，我成功地转换了大部分内容..但由于某些语法错误，有一个功能无法正常工作。任何人都知道
获取像素， 从Argb， 设置像素， 内存流， 编码(marshal)， 图像锁定模式， 像素格式
代码是这样
private void tresh()
{
int hight = image1.Source.Height;
int width = image1.Source.Width;
BitmapImage img = new BitmapImage(image1.Source);
BitmapImage newImg = new BitmapImage(width, hight);
int threshold = 0;
for (int i = 0; i < hight; i++)
{
for (int j = 0; j < width; j++)
{
int grayScale = (int)((img.GetPixel(j, i).R * 0.3) + (img.GetPixel(j, i).G * 0.59) + (img.GetPixel(j, i).B * 0.11));
Color nc = Color.FromArgb(grayScale, grayScale, grayScale);
newImg.SetPixel(j, i, nc);
}
}
image1.Source = newImg;
MemoryStream ms = new MemoryStream();
newImg.Save(ms, ImageFormat.Bmp);
byte[] bmpBytes = ms.GetBuffer();
threshold = getOtsuNumber(bmpBytes);
byte[] newBytArr = new byte[bmpBytes.Length];
for (int i = 0; i < bmpBytes.Length; i++)
{
if ((0xFF & bmpBytes[i]) >= threshold)
{
newBytArr[i] = ((byte)255);
}
else
{
newBytArr[i] = ((byte)0);
}
}
BitmapImage oldBmp = newImg;
width = oldBmp.Width;
int height = oldBmp.Height;
BitmapData oldData = oldBmp.LockBits(
new Rectangle(0, 0, oldBmp.Width, oldBmp.Height),
ImageLockMode.WriteOnly,
oldBmp.PixelFormat);
int length = oldData.Stride * oldBmp.Height;
byte[] stream = new byte[length];
Marshal.Copy(oldData.Scan0, stream, 0, length);
oldBmp.UnlockBits(oldData);
BitmapImage bmp = new Bitmap(width, height, oldBmp.PixelFormat);
BitmapData bmpData = bmp.LockBits(
new Rectangle(0, 0, width, height),
ImageLockMode.WriteOnly,
bmp.PixelFormat);
for (int n = 0; n < length; n++)
{
if ((0xFF & stream[n]) >= 57)
{
Marshal.WriteByte(bmpData.Scan0, n, ((byte)255));
}
else
{
Marshal.WriteByte(bmpData.Scan0, n, ((byte)0));
}
}
bmp.UnlockBits(bmpData);
image1.Source = bmp;
}
最佳答案
您必须将类型 int 更改为 byte
关于c# - Windows Phone 中的位图操作 : How to deal with GetPixel, SetPixel、PixelFormat 等？，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/11175356/