/// <summary>
/// Save and read Image Deskew
/// </summary>
/// <param name="filename"></param>
/// <returns></returns>
//public static string SaveAndRead(string filename)
//{
// const double MINIMUM_DESKEW_THRESHOLD = 0.05d;
// //string bmstr = @"C:\Users\admin\source\repos\RGB2Gray\japan3.png";
// var bmstr = filename;
// var temFile = bmstr.Substring(bmstr.LastIndexOf('\\') + 1);
// var temFile2 = temFile.Substring(0, temFile.LastIndexOf('.'));
// string graystr = bmstr.Substring(0, bmstr.LastIndexOf('\\') + 1) + temFile2 + "Deskew2.png";
// Console.WriteLine(graystr);
// Bitmap sourcebm = null;
// Bitmap graybm = null;
// if (!File.Exists(graystr))
// {
// try
// {
// Stopwatch stpWatch = Stopwatch.StartNew();
// sourcebm = new Bitmap(bmstr);
// //Using deskew algorithm here
// gmseDeskew skew= new gmseDeskew(sourcebm);
// double imageSkewAngle = skew.GetSkewAngle();
// if (imageSkewAngle > MINIMUM_DESKEW_THRESHOLD || imageSkewAngle <-(MINIMUM_DESKEW_THRESHOLD))
// {
// Console.WriteLine("imageSkewAngle: " + imageSkewAngle);
// graybm = RotateImage2((Bitmap)skew.cBmp, -imageSkewAngle);
// graybm.Save(graystr);
// stpWatch.Stop();
// var t = stpWatch.Elapsed.TotalMilliseconds.ToString();
// Console.WriteLine("Convert RGB to Gray sucessfully within {0} ms", t);
// return graystr;
// }
// return null;
// }
// catch (Exception e)
// {
// Console.WriteLine("Error message" + e.Message);
// return null;
// }
// finally
// {
// if (sourcebm != null)
// {
// sourcebm.Dispose();
// }
// if (graybm != null)
// {
// graybm.Dispose();
// }
// }
// }
// return graystr;
//}
// Return deskewedImage
public static Bitmap DeskewImage(Image currentImg)
{
const double MINIMUM_DESKEW_THRESHOLD = 0.05d;
//string bmstr = @"C:\Users\admin\source\repos\RGB2Gray\japan3.png";
//var bmstr = filename;
//var temFile = bmstr.Substring(bmstr.LastIndexOf('\\') + 1);
//var temFile2 = temFile.Substring(0, temFile.LastIndexOf('.'));
//string graystr = bmstr.Substring(0, bmstr.LastIndexOf('\\') + 1) + temFile2 + "Deskew2.png";
//Console.WriteLine(graystr);
Bitmap sourcebm = null;
Bitmap graybm = null;
sourcebm = new Bitmap(currentImg);
//Using deskew algorithm here
gmseDeskew skew = new gmseDeskew(sourcebm);
double imageSkewAngle = skew.GetSkewAngle();
if (imageSkewAngle > MINIMUM_DESKEW_THRESHOLD || imageSkewAngle < -(MINIMUM_DESKEW_THRESHOLD))
{
Console.WriteLine("imageSkewAngle: " + imageSkewAngle);
graybm = RotateImage2((Bitmap)skew.cBmp, -imageSkewAngle);
//graybm = gmseDeskew.CropRotationRect((Bitmap)skew.cBmp, new Rectangle(26,146, 676, 109), (float)-imageSkewAngle, true);
return(graybm);
}
else
{
return(sourcebm);
}
}
public static string SaveAndRead(string filename)
{
const double MINIMUM_DESKEW_THRESHOLD = 0.05d;
//string bmstr = @"C:\Users\admin\source\repos\RGB2Gray\japan3.png";
var bmstr = filename;
var temFile = bmstr.Substring(bmstr.LastIndexOf('\\') + 1);
var temFile2 = temFile.Substring(0, temFile.LastIndexOf('.'));
string graystr = bmstr.Substring(0, bmstr.LastIndexOf('\\') + 1) + temFile2 + "Deskew2.png";
Console.WriteLine(graystr);
Bitmap sourcebm = null;
Bitmap graybm = null;
if (!File.Exists(graystr))
{
try
{
Stopwatch stpWatch = Stopwatch.StartNew();
sourcebm = new Bitmap(bmstr);
//Using deskew algorithm here
gmseDeskew skew = new gmseDeskew(sourcebm);
double imageSkewAngle = skew.GetSkewAngle();
if (imageSkewAngle > MINIMUM_DESKEW_THRESHOLD || imageSkewAngle < -(MINIMUM_DESKEW_THRESHOLD))
{
Console.WriteLine("imageSkewAngle: " + imageSkewAngle);
graybm = RotateImage2((Bitmap)skew.cBmp, -imageSkewAngle);
graybm.Save(graystr);
stpWatch.Stop();
var t = stpWatch.Elapsed.TotalMilliseconds.ToString();
Console.WriteLine("Convert RGB to Gray sucessfully within {0} ms", t);
return(graystr);
}
return(null);
}
catch (Exception e)
{
Console.WriteLine("Error message" + e.Message);
return(null);
}
finally
{
if (sourcebm != null)
{
sourcebm.Dispose();
}
if (graybm != null)
{
graybm.Dispose();
}
}
}
return(graystr);
}
/// <summary>
/// This is used to automatically find skewAngle and skew
/// </summary>
/// <param name="source"></param>
/// <param name="rect"></param>
/// <param name="HighQuality"></param>
/// <returns></returns>
public static Bitmap CropRotationRect2(Bitmap source, Rectangle rect, bool HighQuality)
{
int addition = (int)Math.Sqrt(rect.Width * rect.Width + rect.Height * rect.Height) - rect.Width;
rect = new Rectangle(rect.X - (int)addition / 2, rect.Y, (int)Math.Sqrt(rect.Width * rect.Width + rect.Height * rect.Height), rect.Height);
//Crop function first
Image img = CropImage.Crop(source, rect);
//Get skewAngle first time
double imageSkewAngle_temp = 100; //initial skew angle
double imageSkewAngle = 0; //not skew
int iter = 0; //iteration
while (Math.Abs(imageSkewAngle_temp) > 0.1 && iter < 5)
{
var skew = new gmseDeskew(ImageConverter.BitmapImage2Bitmap(ImageConverter.Image2BitmapImage(img)));
imageSkewAngle_temp = skew.GetSkewAngle();
imageSkewAngle = imageSkewAngle + imageSkewAngle_temp;
img = gmseDeskew.DeskewImage(img);
iter = iter + 1;
}
Debug.WriteLine("Goc skew tich luy sau loop: " + imageSkewAngle.ToString());
Bitmap result = new Bitmap(rect.Width, rect.Height);
using (Graphics g = Graphics.FromImage(result))
{
g.InterpolationMode = HighQuality ? InterpolationMode.HighQualityBicubic : InterpolationMode.Default;
using (Matrix mat = new Matrix())
{
mat.Translate(-rect.X, -rect.Y);
mat.RotateAt(-(float)imageSkewAngle, new Point(rect.X + (int)rect.Width / 2, rect.Y + (int)rect.Height / 2));
g.Transform = mat;
g.DrawImage(source, new Point(0, 0));
}
}
return(result);
}
//perform use skew angle from Deskew algorithm
/// <summary>
/// This method is used to find skewAngle with specificed time and skew
/// </summary>
/// <param name="source"></param>
/// <param name="rect"></param>
/// <param name="HighQuality"></param>
/// <returns></returns>
public static Bitmap CropRotationRect(Bitmap source, Rectangle rect, bool HighQuality)
{
//Crop function first
Image img = CropImage.Crop(source, rect);
//Get skewAngle first time
gmseDeskew skew = new gmseDeskew(ImageConverter.BitmapImage2Bitmap(ImageConverter.Image2BitmapImage(img)));
double imageSkewAngle = skew.GetSkewAngle();
//Accumulate skewAngle second time
Bitmap img2 = gmseDeskew.DeskewImage(ImageConverter.BitmapImage2Bitmap(ImageConverter.Image2BitmapImage(img)));
skew = new gmseDeskew(img2);
imageSkewAngle = imageSkewAngle + skew.GetSkewAngle();
//Accumulate skewAngle third time
//Bitmap img3 = gmseDeskew.DeskewImage(img2);
//gmseDeskew skew3 = new gmseDeskew(img3);
//imageSkewAngle = imageSkewAngle + skew3.GetSkewAngle();
Debug.WriteLine("Goc skew sau 2 lan tim: " + imageSkewAngle.ToString());
Bitmap result = new Bitmap(rect.Width, rect.Height);
using (Graphics g = Graphics.FromImage(result))
{
g.InterpolationMode = HighQuality ? InterpolationMode.HighQualityBicubic : InterpolationMode.Default;
using (Matrix mat = new Matrix())
{
mat.Translate(-rect.X, -rect.Y);
mat.RotateAt(-(float)imageSkewAngle, new Point(rect.X + (int)rect.Width / 2, rect.Y + (int)rect.Height / 2));
g.Transform = mat;
g.DrawImage(source, new Point(0, 0));
}
}
return(result);
}
