HALCON Hobject和Bitmap相互转换
灰度图HObject转Bitmap
public static Bitmap HObject2Bitmap(HObject ho)
{
try
{
HTuple type, width, height, pointer;
//HOperatorSet.AccessChannel(ho, out ho, 1);
HOperatorSet.GetImagePointer1(ho, out pointer, out type, out width, out height);
//himg.GetImagePointer1(out type, out width, out height);
Bitmap bmp = new Bitmap(width.I, height.I, PixelFormat.Format8bppIndexed);
ColorPalette pal = bmp.Palette;
for (int i = 0; i <= 255; i++)
{
pal.Entries[i] = Color.FromArgb(255, i, i, i);
}
bmp.Palette = pal;
BitmapData bitmapData = bmp.LockBits(new Rectangle(0, 0, width, height), ImageLockMode.WriteOnly, PixelFormat.Format8bppIndexed);
int PixelSize = Bitmap.GetPixelFormatSize(bitmapData.PixelFormat) / 8;
int stride = bitmapData.Stride;
int ptr = bitmapData.Scan0.ToInt32();
for (int i = 0; i < height; i++)
{
CopyMemory(ptr, pointer, width * PixelSize);
pointer += width;
ptr += bitmapData.Stride;
}
bmp.UnlockBits(bitmapData);
return bmp;
}
catch (Exception exc)
{
return null;
}
}
灰度图的HObject转HImage
public HImage HObject2HImage1(HObject hObj)
{
HImage image = new HImage();
HTuple type, width, height, pointer;
HOperatorSet.GetImagePointer1(hObj, out pointer,out type, out width, out height);
image.GenImage1(type, width, height, pointer);
return image;
}
Bitbmp转Hobject
public void BitmapToHobject(Bitmap bitmap, out HObject image)
{
int height = bitmap.Height;//图像的高度
int width = bitmap.Width;//图像的宽度
Rectangle imgRect = new Rectangle(0, 0, width, height);
BitmapData bitData = bitmap.LockBits(imgRect, ImageLockMode.ReadOnly, bitmap.PixelFormat);
//由于Bitmap图像每行的字节数必须保持为4的倍数，因此在行的字节数不满足这个条件时，会对行进行补充，步幅数Stride表示的就是补充过后的每行的字节数，也成为扫描宽度
int stride = bitData.Stride;
switch (bitmap.PixelFormat)
{
case PixelFormat.Format8bppIndexed:
{
unsafe
{
int count = height * width;
byte[] data = new byte[count];
byte* bptr = (byte*)bitData.Scan0;
fixed (byte* pData = data)
{
for (int i = 0; i < height; i++)
{
for (int j = 0; j < width; j++)
{
/*
*
如果直接使用GenImage1，传入BitData的Scan0（图像首元素的指针）作为内存指针的话，如果图像不满足行为4的倍数，那么填充的部分也会参与进来，从而导致图像扭曲
*
*
*/
//舍去填充的部分
data[i * width + j] = bptr[i * stride + j];
}
}
HOperatorSet.GenImage1(out image, "byte", width, height, new IntPtr(pData));
}
}
}
break;
case PixelFormat.Format24bppRgb:
{
unsafe
{
int count = height * width * 3;//24位的BitMap每个像素三个字节
byte[] data = new byte[count];
byte* bptr = (byte*)bitData.Scan0;
fixed (byte* pData = data)
{
for (int i = 0; i < height; i++)
{
for (int j = 0; j < width * 3; j++)
{
//每个通道的像素需一一对应
data[i * width * 3 + j] = bptr[i * stride + j];
}
}
HOperatorSet.GenImageInterleaved(out image, new IntPtr(pData), "bgr", bitmap.Width, bitmap.Height, 0, "byte", bitmap.Width, bitmap.Height, 0, 0, -1, 0);
}
}
}
break;
default:
{
unsafe
{
int count = height * width;
byte[] data = new byte[count];
byte* bptr = (byte*)bitData.Scan0;
fixed (byte* pData = data)
{
for (int i = 0; i < height; i++)
{
for (int j = 0; j < width; j++)
{
data[i * width + j] = bptr[i * stride + j];
}
}
HOperatorSet.GenImage1(out image, "byte", width, height, new IntPtr(pData));
}
}
}
break;
}
bitmap.UnlockBits(bitData);
}
}