/**
* @brief
* Creat an ImageF from a Bitmap
*
* The function takes the intensity of each pixel by adding the RGB values
*
* @param bm The bitmap to wrap
* @return The created ImageF
*
* @note The funcion is declared <i>unsafe</i> since it uses pointers to the
* bitmap data to speed-up the process ofg conversion
*/
unsafe static public ImageF FromBitmap(Bitmap bm)
{
Rectangle rect = new Rectangle(new Point(0, 0), bm.Size);
BitmapData pixels = bm.LockBits(rect, ImageLockMode.ReadOnly, PixelFormat.Format24bppRgb);
var image = new ImageF(bm.Width, bm.Height);
for (int y = 0; y < bm.Height; y++)
{
int scan = y * pixels.Stride;
for (int x = 0; x < bm.Width; x++)
{
int offset = scan + 3 * x;
byte r = ((byte *)pixels.Scan0)[offset];
byte g = ((byte *)pixels.Scan0)[offset + 1];
byte b = ((byte *)pixels.Scan0)[offset + 2];
double v = (r + g + b) / (256.0 * 3.0);
image.imageData[x, y] = v;
}
}
bm.UnlockBits(pixels);
return(image);
}
/**
* @brief
* Create an ImageF from a two-dimensional array
*
* @param array The two dimensional arry to wrap in an ImageF
* @return The created ImageF
*/
static public ImageF FromArray(double[,] array)
{
ImageF result = new ImageF();
result.imageData = array;
return(result);
}
/**
* @brief
* Perform a single iteration
*
* @return The new estimate of the image
*/
public ImageF Iterate()
{
ImageF In = Psf.Convolute(Sn);
ImageF Cn = Psf.ConvoluteTranspose(Image / In);
Sn *= Cn;
return(Sn);
}
private void menuFileOpen_Click(object sender, EventArgs e)
{
if (this.openFileDialog.ShowDialog() == DialogResult.OK)
{
String theFile = openFileDialog.FileName;
photograph = new PhotographData(theFile);
iImage = Bitmap.FromFile(theFile);
iImageF = ImageF.FromBitmap(iImage as Bitmap);
this.pictureMain.Size = iImage.Size;
pictureMain.Image = iImage;
//this.AutoScrollMinSize = new Size(iImage.Width, iImage.Height);
}
}
/**
* @brief
* Multiply this object with an ImageF pixelwise
*
* @param rhs
* ImageF object to multiply with
*
* @return
* The result of the multiplication
*/
public ImageF Multiply(ImageF rhs)
{
ImageF result = new ImageF(Width, Height);
for (int i = 0; i < Width; i++)
{
for (int j = 0; j < Height; j++)
{
result.imageData[i, j] = this[i, j] * rhs[i, j];
}
}
return(result);
}
/**
* @brief
* Create an image with a constant pixel value
*
* @param width Width of the image
* @param height Height of the omage
* @param value Value to set each pixel to
*/
public static ImageF ConstantImage(int width, int height, double value)
{
ImageF result = new ImageF(width, height);
for (int i = 0; i < width; i++)
{
for (int j = 0; j < height; j++)
{
result.imageData[i, j] = value;
}
}
return(result);
}
/**
* @brief
* Divide this object by an ImageF pixelwise
*
* @param rhs
* ImageF object to divide by
*
* @return
* The result of the division
*
* @note Even ifg a pixel in rhs is 0, the division will not fail
*/
public ImageF Divide(ImageF rhs)
{
double Limit = 0.0000001;
ImageF result = new ImageF(Width, Height);
for (int i = 0; i < Width; i++)
{
for (int j = 0; j < Height; j++)
{
result.imageData[i, j] = this[i, j] / Math.Max(rhs[i, j], Limit);
}
}
return(result);
}
/**
* @brief
* Add an ImageF pixelwise to this object
*
* @param rhs
* ImageF object to add
*
* @return
* The result of the addition
*/
public ImageF Add(ImageF rhs)
{
Debug.Assert(Width == rhs.Width && Height == rhs.Height);
var result = new ImageF(Width, Height);
for (int i = 0; i < Width; i++)
{
for (int j = 0; j < Height; j++)
{
result.imageData[i, j] = this[i, j] + rhs[i, j];
}
}
return(result);
}
private void CheckSize(ImageF image)
{
if (Convolver == null || FftSize.Width != image.Width || FftSize.Height != image.Height)
{
FftSize = new Size(image.Width, image.Height);
double[,] imgData = new double[FftSize.Width, FftSize.Height];
for (int x = 0; x < FftSize.Width; x++)
{
for (int y = 0; y < FftSize.Height; y++)
{
imgData[x, y] = this[x + Xmin, y + Ymin];
}
}
Convolver = new FftwConvolver.FftwConvolver(FftSize, imgData, new Point(-Xmin, -Ymin));
}
}
private void btnLoad_Click(object sender, EventArgs e)
{
OpenFileDialog dlg = new OpenFileDialog();
dlg.Filter = "PhotoData|*.pds";
dlg.DefaultExt = "pds";
if (dlg.ShowDialog() == DialogResult.OK)
{
photograph = PhotographData.Load(dlg.FileName);
iImage = Bitmap.FromFile(photograph.Image);
iImageF = ImageF.FromBitmap(iImage as Bitmap);
this.pictureMain.Size = iImage.Size;
pictureMain.Image = iImage;
foreach (SpatiallyVariantPsf thePsf in photograph.PSFs)
{
this.imageScan1.Add(thePsf);
}
}
}
public static ImageF Starfield(int width, int height, int nStars, double noise)
{
ImageF result = new ImageF(width, height);
Random rand = new Random();
for (int x = 0; x < width; x++)
{
for (int y = 0; y < height; y++)
{
result.imageData[x, y] = rand.NextDouble() * noise;
}
}
for (int i = 0; i < nStars; i++)
{
int x = rand.Next(width);
int y = rand.Next(height);
result.imageData[x, y] = 1.0;
}
return(result);
}
public static ImageF RandomPixelImage(int width, int height, int nPoints)
{
ImageF result = new ImageF(width, height);
for (int x = 0; x < width; x++)
{
for (int y = 0; y < height; y++)
{
result.imageData[x, y] = 0.0;
}
}
Random rand = new Random();
for (int i = 0; i < nPoints; i++)
{
int x = rand.Next(width);
int y = rand.Next(height);
result.imageData[x, y] = 1.0;
}
return(result);
}
/**
* @brief
* Constructor
*
* @param image
* The image
* @param psf
* The %PSF to de-convolve
*
* Note that it is not important to know about the %PSF, just that
* it is an object that can convolve itself withan image
*/
public RichardsonLucyDeconvolution(ImageF image, IConvolutable psf)
{
Image = image;
Psf = psf;
Sn = ImageF.ConstantImage(image.Width, image.Height, 0.5);
}
public ImageF ConvoluteTranspose(ImageF image)
{
throw new NotImplementedException();
}
unsafe static public PSF FromBitmap(ImageF image, Point pos)
{
PSF thePsf = new PSF();
ScanLineAnalyzer analyzer = new ScanLineAnalyzer(image, pos.Y, pos.X);
analyzer.FindBackground();
thePsf._xmin = analyzer.LeftBackgroundPosition;
thePsf._xmax = analyzer.RightBackgroundPosition;
List <double> row = new List <double>();
for (int x = analyzer.LeftBackgroundPosition; x <= analyzer.RightBackgroundPosition; x++)
{
row.Add(image[x, pos.Y]);
}
thePsf.iData[0] = row;
do
{
analyzer.ScanLine--;
analyzer.Analyze();
if (analyzer.LeftBackgroundPosition < thePsf.Xmin)
{
thePsf.Xmin = analyzer.LeftBackgroundPosition;
}
if (analyzer.RightBackgroundPosition > thePsf.Xmax)
{
thePsf.Xmax = analyzer.RightBackgroundPosition;
}
row = new List <double>();
for (int x = thePsf.Xmin; x <= thePsf.Xmax; x++)
{
if (x < analyzer.LeftBackgroundPosition || x > analyzer.RightBackgroundPosition)
{
row.Add(0.0);
}
else
{
row.Add(image[x, (int)analyzer.ScanLine]);
}
}
thePsf.iData.Insert(0, row);
thePsf._ymin = (int)analyzer.ScanLine;
} while(!analyzer.IsBackgroundLine);
analyzer.ScanLine = pos.Y;
do
{
analyzer.ScanLine++;
analyzer.Analyze();
if (analyzer.LeftBackgroundPosition < thePsf.Xmin)
{
thePsf.Xmin = analyzer.LeftBackgroundPosition;
}
if (analyzer.RightBackgroundPosition > thePsf.Xmax)
{
thePsf.Xmax = analyzer.RightBackgroundPosition;
}
row = new List <double>();
for (int x = thePsf.Xmin; x <= thePsf.Xmax; x++)
{
if (x < analyzer.LeftBackgroundPosition || x > analyzer.RightBackgroundPosition)
{
row.Add(0.0);
}
else
{
row.Add(image[x, (int)analyzer.ScanLine]);
}
}
thePsf.iData.Add(row);
thePsf._ymax = (int)analyzer.ScanLine;
} while (!analyzer.IsBackgroundLine);
thePsf.Normalize();
return(thePsf);
}
public ScanLineAnalyzer(ImageF image)
{
Image = image;
}
public ScanLineAnalyzer(ImageF image, int scanLine)
{
Image = image;
ScanLine = scanLine;
}
/// <summary>
/// Constructor
/// </summary>
/// <param name="image"></param>
/// <param name="scanLine"></param>
/// <param name="xCenter"></param>
public ScanLineAnalyzer(ImageF image, int scanLine, int xCenter)
{
Image = image;
ScanLine = scanLine;
XCenter = xCenter;
}
public ImageF ConvoluteTranspose(ImageF image)
{
CheckSize(image);
return(ImageF.FromArray(Convolver.Convolve(image.ToRawData)));
}