/// <summary>
/// 重置图片的指定大小并且居中
/// </summary>
/// <param name="list"></param>
/// <returns></returns>
public static List <Bitmap> ToResizeAndCenterIt(List <Bitmap> list, int w = 20, int h = 20)
{
List <Bitmap> resizeList = new List <Bitmap>();
for (int i = 0; i < list.Count; i++)
{
//反转一下图片
list[i] = new Invert().Apply(list[i]);
int sw = list[i].Width;
int sh = list[i].Height;
Crop corpFilter = new Crop(new Rectangle(0, 0, w, h));
list[i] = corpFilter.Apply(list[i]);
//再反转回去
list[i] = new Invert().Apply(list[i]);
//计算中心位置
int centerX = (w - sw) / 2;
int centerY = (h - sh) / 2;
list[i] = new CanvasMove(new IntPoint(centerX, centerY), Color.White).Apply(list[i]);
resizeList.Add(list[i]);
}
return(resizeList);
}
//Finds the offset of the center of the part and the center of the image
public Bitmap centerPart(Bitmap inImage)
{
//Updates the center of the part
findCenter(inImage);
//Center of the frame
int imageCenterX = inImage.Width / 2;
int imageCenterY = inImage.Height / 2;
//initialization of the X offset and Y offset for the center of the image and the part
int xOffset = 0;
int yOffset = 0;
//Creating a temporary bitmap to apply graphics to(Grpahics doesn't accept canny images)
Bitmap modifiedBitmap = new Bitmap(inImage.Width, inImage.Height);
Graphics g = Graphics.FromImage(modifiedBitmap);
//Finds the distance from part's center and the center of the frame
if (centerPoint.X < imageCenterX)
{
xOffset = (imageCenterX - (int)centerPoint.X);
}
else if (centerPoint.X > imageCenterX)
{
xOffset = -((int)centerPoint.X - imageCenterX);
}
if (centerPoint.Y < imageCenterY)
{
yOffset = (imageCenterY - (int)centerPoint.Y);
}
else if (centerPoint.Y > imageCenterY)
{
yOffset = -((int)centerPoint.Y - imageCenterY);
}
//Redraws the orignal image
g.DrawImage(inImage, 0, 0);
//Shifts the image according to the X and Y offsets
CanvasMove shiftImage = new CanvasMove(new AForge.IntPoint(xOffset, yOffset), Color.White);
modifiedBitmap = shiftImage.Apply(modifiedBitmap);
return(modifiedBitmap);
}
public static Bitmap ToResizeAndCenterIt(Bitmap img, int w = 40, int h = 50)
{
//反转一下图片
img = new Invert().Apply(img);
int sw = img.Width;
int sh = img.Height;
Crop corpFilter = new Crop(new Rectangle(0, 0, w, h));
img = corpFilter.Apply(img);
//再反转回去
img = new Invert().Apply(img);
//计算中心位置
int centerX = (w - sw) / 2;
int centerY = (h - sh) / 2;
img = new CanvasMove(new IntPoint(centerX, centerY), Color.White).Apply(img);
return(img);
}
public void DeSkew()
{
Rectangle vBoundary = new Rectangle(new Point(0, 0), new Size(140, originalImage.Height));
Emgu.CV.Cvb.CvBlobDetector bDetect = new Emgu.CV.Cvb.CvBlobDetector();
Emgu.CV.Cvb.CvBlobs markerBlob = new Emgu.CV.Cvb.CvBlobs();
List <Rectangle> blobs = new List <Rectangle>();
Image <Gray, Byte> preprocessImage = originalImage.Convert <Gray, Byte>();
preprocessImage = preprocessImage.ThresholdBinary(new Gray(200), new Gray(255));
preprocessImage = preprocessImage.Not();
markerBlob.Clear();
bDetect.Detect(preprocessImage, markerBlob);
preprocessImage.Dispose();
preprocessImage = null;
markerBlob.FilterByArea(250, 1800);
foreach (Emgu.CV.Cvb.CvBlob targetBlob in markerBlob.Values)
{
if (vBoundary.Contains(targetBlob.BoundingBox))
{
if (targetBlob.BoundingBox.Width >= targetBlob.BoundingBox.Height - 5)
{
Rectangle r = new Rectangle(targetBlob.BoundingBox.X, targetBlob.BoundingBox.Y, targetBlob.BoundingBox.Width, targetBlob.BoundingBox.Height);
blobs.Add(r);
}
}
}
RectangleF temp = blobs.First();
RectangleF temp2 = blobs.Last();
double dY = Math.Abs(temp.Y - temp2.Y);
double dX = Math.Abs(temp.X - temp2.X);
double angle = Math.Atan2(dX, dY);
angle = angle * (180 / Math.PI);
if (temp2.X > temp.X)
{
angle = angle * -1;
}
RotatedRect rot_rec = new RotatedRect();
rot_rec.Center = new PointF(temp.X, temp.Y);
RotationMatrix2D rot_mat = new RotationMatrix2D(rot_rec.Center, angle, 1);
Image <Bgr, Byte> outimage = originalImage.CopyBlank();
CvInvoke.WarpAffine(originalImage, outimage, rot_mat, originalImage.Size, Inter.Cubic, Warp.Default, BorderType.Constant, new Bgr(Color.White).MCvScalar);
int xOffset = 80 - (int)temp.X;
int yOffset = 45 - (int)temp.Y;
originalImage = outimage.Copy();
Bitmap a = originalImage.ToBitmap();
CanvasMove filter = new CanvasMove(new AForge.IntPoint(xOffset, yOffset), Color.White);
a = filter.Apply(a);
originalImage = new Image <Bgr, Byte>(a);
a.Dispose();
a = null;
outimage.Dispose();
outimage = null;
blobs = null;
}