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228 lines (206 loc) · 8.54 KB
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using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Drawing;
using System.Drawing.Imaging;
namespace AutoPickingSys
{
class GetBackGround
{
public void BGPoint(Bitmap b, int X, int Y, float R, out Point positionPoint,out Color BackGroundColor)
{
Point _positionPoint=new Point (0,0);
Color _backGroundColor;
//Bitmap b = (Bitmap)bitmap.Clone();
int width = b.Width;
int height = b.Height;
int rr, gg, bb;
int Rbg, Gbg, Bbg;
Rbg = Gbg = Bbg = 0;
int[] Rc = new int[256];
int[] Gc = new int[256];
int[] Bc = new int[256];
for (int i = 0; i < 255; i++)
{
Rc[i] = 0;
Gc[i] = 0;
Bc[i] = 0;
}
if (b != null)
{
bool getBG = false;
Bitmap dstImage = new Bitmap(width, height);// (Bitmap)b.Clone();//
dstImage = (Bitmap)b.Clone();
BitmapData srcData = b.LockBits(new Rectangle(0, 0, width, height),
ImageLockMode.ReadOnly, PixelFormat.Format32bppArgb);
unsafe
{
byte* src = (byte*)srcData.Scan0;
byte* nsrc;
int stride = srcData.Stride;
int offset = stride - width * 4;
nsrc = src;//保存左上角当前指针
for (int i = 0; i < width; i++)//
{
//纵向定位当前点指针
for (int j = 0; j < height; j++)//从上往下搜索
{
//dnum = 0;
src = nsrc + i * 4 + j * stride;
if ((i - X) * (i - X) + (j - Y) * (j - Y) < R * R)//如果x^2+y^2<r^2
{
bb = src[0];
gg = src[1];
rr = src[2];
gg = gg / 3;
rr = rr / 3;
bb = bb / 3;
Rc[rr]++;
Gc[gg]++;
Bc[bb]++;
}
}
}
for (int i = 0; i < 255; i++)
{
if (Rc[i] > Rc[Rbg])
Rbg = i;
if (Gc[i] > Gc[Gbg])
Gbg = i;
if (Bc[i] > Bc[Bbg])
Bbg = i;
}
Rbg = Rbg * 3;
Gbg = Gbg * 3;
Bbg = Bbg * 3;
_backGroundColor = Color.FromArgb(Rbg, Gbg, Bbg);
for (int i = 0; i < width; i++)//
{
//纵向定位当前点指针
for (int j = 0; j < height; j++)//从上往下搜索
{
//dnum = 0;
src = nsrc + i * 4 + j * stride;
if ((i - X) * (i - X) + (j - Y) * (j - Y) < R * R)//如果x^2+y^2<r^2
{
src = nsrc + i * 4 + j * stride;
bb = src[0];
gg = src[1];
rr = src[2];
if ((Math.Abs(rr - Rbg) < 3) & (Math.Abs(gg - Gbg) < 3) & (Math.Abs(bb - Bbg) < 3))
{
_positionPoint = new Point(i, j);
getBG = true;
break;
}
}
}
if (getBG)
break;
}
}
}
positionPoint = _positionPoint;
_backGroundColor = Color.FromArgb(Rbg, Gbg, Bbg);
BackGroundColor = _backGroundColor;
}
public void BGPointRectangle(Bitmap bitmap, int X, int Y, int W, int H, out Point positionPoint, out Color BackGroundColor)
{
Point _positionPoint = new Point(0, 0);
Color _backGroundColor;
Bitmap b = (Bitmap)bitmap.Clone();
int width = b.Width;
int height = b.Height;
int rr, gg, bb;
int Rbg, Gbg, Bbg;
Rbg = Gbg = Bbg = 0;//初始化；
int[] Rc = new int[256];//定义Rc的容量为256；
int[] Gc = new int[256];
int[] Bc = new int[256];
for (int i = 0; i < 256; i++)//全部置0；
{
Rc[i] = 0;
Gc[i] = 0;
Bc[i] = 0;
}
if (b != null)
{
bool getBG = false;//设定getBG初始布尔值为false;
Bitmap dstImage = new Bitmap(width, height);// (Bitmap)b.Clone();//
dstImage = (Bitmap)b.Clone();
BitmapData srcData = b.LockBits(new Rectangle(0, 0, width, height),
ImageLockMode.ReadOnly, PixelFormat.Format32bppArgb);
unsafe
{
byte* src = (byte*)srcData.Scan0;//源图像左上角当前指针；
byte* nsrc;
int stride = srcData.Stride;//扫描宽度；
int offset = stride - width * 4;
nsrc = src;//保存左上角当前指针
for (int i = 0; i < width; i++)//
{
//纵向定位当前点指针
for (int j = 0; j < height; j++)//从上往下搜索
{
//dnum = 0;
src = nsrc + i * 4 + j * stride;
if ((i - X > 0) & (i - X < W) & (j - Y > 0) & (j - Y < H))
{
bb = src[0];
gg = src[1];
rr = src[2];
gg = gg / 3;
rr = rr / 3;
bb = bb / 3;
Rc[rr]++;
Gc[gg]++;
Bc[bb]++;
}
}
}
for (int i = 0; i < 256; i++)
{
if (Rc[i] > Rc[Rbg])//一一比较，得到最大值；
Rbg = i;
if (Gc[i] > Gc[Gbg])
Gbg = i;
if (Bc[i] > Bc[Bbg])
Bbg = i;
}
Rbg = Rbg * 3;
Gbg = Gbg * 3;
Bbg = Bbg * 3;
_backGroundColor = Color.FromArgb(Rbg, Gbg, Bbg);//得到背景色的RGB值；
for (int i = 0; i < width; i++)//
{
//纵向定位当前点指针
for (int j = 0; j < height; j++)//从上往下搜索
{
//dnum = 0;
src = nsrc + i * 4 + j * stride;
if ((i - X > 0) & (i - X < W) & (j - Y > 0) & (j - Y < H))
{
src = nsrc + i * 4 + j * stride;
bb = src[0];
gg = src[1];
rr = src[2];
if ((Math.Abs(rr - Rbg) < 3) & (Math.Abs(gg - Gbg) < 3) & (Math.Abs(bb - Bbg) < 3))//相差3个灰度级；
{
_positionPoint = new Point(i, j);
getBG = true;
break;
}
}
}
if (getBG)
break;
}
}
}
positionPoint = _positionPoint;
_backGroundColor = Color.FromArgb(Rbg, Gbg, Bbg);
BackGroundColor = _backGroundColor;
}
}
}