/// <summary>
/// Cắt đôi hình theo một chiều nào đó.
/// Sử dụng để chuyển hình quét A4 thành 2 hình A5
///
/// </summary>
/// <param name="direction">Hướng cắt</param>
/// <returns>Kết quả được lưu trong mảng Cropped</returns>
public void Crop(CropDirection direction)
{
#region Source##
// Marshal ảnh điểm nguồn vào mảng src
Rectangle srcRect = new Rectangle(0, 0, this.bmp.Width, this.bmp.Height);
BitmapData srcBmpData =
this.bmp.LockBits(srcRect, System.Drawing.Imaging.ImageLockMode.ReadWrite,
this.bmp.PixelFormat);
// Get the address of the first line.
IntPtr srcptr = srcBmpData.Scan0;
int srcBytes = srcBmpData.Stride * srcBmpData.Height;
int destBytes;
byte[] src = new byte[srcBytes];
// Marshal
System.Runtime.InteropServices.Marshal.Copy(srcptr, src, 0, srcBytes);
this.bmp.UnlockBits(srcBmpData);
#endregion
Cropped = new Acquired[2];
Cropped[0] = new Acquired();
Cropped[1] = new Acquired();
switch (direction)
{
case CropDirection.Horizonal:
destBytes = srcBmpData.Stride * (srcBmpData.Height / 2);
Cropped[0].Height = Cropped[1].Height = bmp.Height / 2;
Cropped[0].Width = Cropped[1].Width = bmp.Width;
Cropped[0].ImagePixelFormat = Cropped[1].ImagePixelFormat = bmp.PixelFormat;
Cropped[0].Stride = Cropped[1].Stride = srcBmpData.Stride;
Cropped[0].BytesPerPixel = Cropped[1].BytesPerPixel = srcBmpData.Stride / srcBmpData.Width;
Cropped[0].pixel = new byte[destBytes];
Cropped[1].pixel = new byte[destBytes];
Array.Copy(src, 0, Cropped[0].pixel, 0, destBytes);
Array.Copy(src, destBytes, Cropped[1].pixel, 0, destBytes);
break;
case CropDirection.Vertical:
int cropStride = srcBmpData.Stride / 2;
destBytes = cropStride * srcBmpData.Height;
Cropped[0].Height = Cropped[1].Height = bmp.Height;
Cropped[0].Width = Cropped[1].Width = bmp.Width / 2;
Cropped[0].ImagePixelFormat = Cropped[1].ImagePixelFormat = bmp.PixelFormat;
Cropped[0].Stride = Cropped[1].Stride = cropStride;
Cropped[0].BytesPerPixel = Cropped[1].BytesPerPixel = srcBmpData.Stride / srcBmpData.Width;
Cropped[0].pixel = new byte[destBytes];
Cropped[1].pixel = new byte[destBytes];
for (int y = 0; y < srcBmpData.Height; y++)
{
Array.Copy(src, y * srcBmpData.Stride, Cropped[0].pixel, cropStride * y, cropStride);
Array.Copy(src, y * srcBmpData.Stride + cropStride, Cropped[1].pixel, cropStride * y, cropStride);
}
break;
default:
Cropped = null;
break;
}
}
public Interpret(KeySuite keys, Acquired acquired, Anchor anchor, CoreMsgEventHandler handler)
{
this.result = new Discover();
this.result.file = acquired.FileName;
this.CoreMsg += handler;
this.acq = acquired;
this.keys = keys;
place = new Place(anchor, this.CoreMsgDelegates);
}
/// <summary>
/// Crop (khoét) một vùng bất kỳ trong hình, tức lọc ra.
/// </summary>
/// <param name="sx"></param>
/// <param name="sy"></param>
/// <param name="ex"></param>
/// <param name="ey"></param>
public void Crop(int sx, int sy, int ex, int ey)
{
#region Source##
// Marshal ảnh điểm nguồn vào mảng src
Rectangle srcRect = new Rectangle(0, 0, this.bmp.Width, this.bmp.Height);
BitmapData srcBmpData =
this.bmp.LockBits(srcRect, System.Drawing.Imaging.ImageLockMode.ReadWrite,
this.bmp.PixelFormat);
// Get the address of the first line.
IntPtr srcptr = srcBmpData.Scan0;
int srcBytes = srcBmpData.Stride * srcBmpData.Height;
int destBytes;
byte[] src = new byte[srcBytes];
// Marshal
System.Runtime.InteropServices.Marshal.Copy(srcptr, src, 0, srcBytes);
this.bmp.UnlockBits(srcBmpData);
#endregion
Acquired crop = new Acquired(bmp, this.CoreMsgDelegates);
int width = ex - sx;
int height = ey - sy;
crop.Height = height;
crop.Width = width;
destBytes = srcBmpData.Stride * (srcBmpData.Height / 2);
crop.ImagePixelFormat = bmp.PixelFormat;
int stride = (int)Math.Ceiling(srcBmpData.Stride * width * 1.0 / bmp.Width);
crop.Stride = stride;
crop.BytesPerPixel = srcBmpData.Stride / srcBmpData.Width;
crop.pixel = new byte[stride * height];
for (int i = sy; i < ey; i++)
{
Array.Copy(src, i * srcBmpData.Stride + sx, crop.pixel, (i - sy) * stride, stride); // width * crop.BytesPerPixel);
}
// save to file
//unsafe
//{
// fixed (byte* bmpPtr = crop.pixel)
// {
// Bitmap name = new Bitmap(crop.Width, crop.Height,stride,
// crop.ImagePixelFormat, new IntPtr(bmpPtr));
// name.Save(@"D:\temp\" + DateTime.Today.ToFileTime());
// }
//}
}
public Discover OneFile(string fileName, ref KeySuite keys)
{
if (!File.Exists(fileName))
{
Inform(this, "Tệp {0} không có thực!", fileName);
return(null);
}
else
{
Inform(this, "Xử lý: '{0}'", fileName);
}
FileStream fs = new FileStream(fileName, FileMode.Open, FileAccess.Read, FileShare.Read);
Acquired acq;
try
{
Bitmap sourceBitmap = new Bitmap(fs);
switch (sourceBitmap.PixelFormat)
{
case PixelFormat.Format24bppRgb:
case PixelFormat.Format32bppArgb:
case PixelFormat.Format8bppIndexed:
break;
default:
Inform(this, "Hệ màu không hỗ trợ. Chỉnh lại cấu hình quét về màu RGB hoặc Grey 8-bit.");
return(null);
}
acq = new Acquired(sourceBitmap, CoreMsgDelegates);
acq.FileName = fileName;
}
catch (ArgumentException) { Inform(this, "Tệp'{0}' bị hỏng.", fileName); return(null); }
finally { fs.Close(); }
Anchor anchor = new Anchor(acq, this.CoreMsgDelegates);
anchor.Detect(AnchorType.TopLeft);
anchor.Detect(AnchorType.TopRight);
anchor.Detect(AnchorType.BottomLeft);
anchor.Detect(AnchorType.BottomRight);
Inform(this, string.Format("Neo: TL{0} TR{1} BL{2} BR{3}",
anchor[AnchorType.TopLeft].ToString(),
anchor[AnchorType.TopRight].ToString(),
anchor[AnchorType.BottomLeft].ToString(),
anchor[AnchorType.BottomRight].ToString()));
if (anchor.Acceptable)
{
Interpret interpret = new Interpret(keys, acq, anchor, this.CoreMsgDelegates);
interpret.FindAnswer();
interpret.FindStudent();
interpret.FindProblem();
interpret.FindGroup();
interpret.FindMark();
interpret.Result.root = anchor[AnchorType.TopLeft];
interpret.Result.portion = keys.portion;
return(interpret.Result);
}
else
{
return(null);
}
}
public Anchor(Acquired acq, CoreMsgEventHandler handler)
{
this.CoreMsg += handler;
this.acq = acq;
SearchAnchorBoxSize = acq.Width / 4;
}
