/// <summary>
/// Rotates this <see cref="Image"/> 90 degrees clockwise.
/// </summary>
/// <param name="dst">The destination <see cref="Image"/>. Can be <b>null</b>.</param>
/// <returns>
/// The destination <see cref="Image"/>.
/// </returns>
/// <exception cref="NotSupportedException">
/// <para>The depth of this <see cref="Image"/> is neither 1 nor 8 nor 24 nor 32 bits per pixel.</para>
/// </exception>
/// <remarks>
/// <para>If <paramref name="dst"/> is <b>null</b> the method creates new destination <see cref="Image"/> with dimensions of this <see cref="Image"/>.</para>
/// <para>If <paramref name="dst"/> equals this <see cref="Image"/>, the operation is performed in-place.</para>
/// <para>Conversely, the <paramref name="dst"/> is reallocated to the dimensions of this <see cref="Image"/>.</para>
/// </remarks>
public Image Rotate270(Image dst)
{
if (this.BitsPerPixel != 1 && this.BitsPerPixel != 8 && this.BitsPerPixel != 24 && this.BitsPerPixel != 32)
{
throw new NotSupportedException(string.Format(
CultureInfo.InvariantCulture,
Properties.Resources.E_UnsupportedDepth,
this.BitsPerPixel));
}
bool inplace = dst == this;
dst = this.CreateTemplate(dst, this.Height, this.Width, this.BitsPerPixel);
IPP.Execute(() =>
{
return(NativeMethods.rotate270(
this.BitsPerPixel,
this.Width,
this.Height,
this.Bits,
this.Stride8,
dst.Bits,
dst.Stride8));
});
if (inplace)
{
this.Attach(dst);
return(this);
}
return(dst);
}
/// <summary>
/// Converts this <see cref="ImageF"/> to a color 32-bit <see cref="Image"/>.
/// </summary>
/// <param name="dst">The destination <see cref="Image"/>. Can be <b>null</b>.</param>
/// <param name="convertAlphaChannel">Determines whether this <see cref="ImageF"/> contains alpha channel.</param>
/// <param name="rounding">The rounding mode.</param>
/// <returns>
/// The destination <see cref="Image"/>.
/// </returns>
/// <remarks>
/// <para>If <paramref name="dst"/> is <b>null</b> the method creates new destination <see cref="Image"/> with dimensions of this <see cref="Image"/>.</para>
/// <para>If <paramref name="dst"/> equals this <see cref="Image"/>, the operation is performed in-place.</para>
/// <para>Conversely, the <paramref name="dst"/> is reallocated to the dimensions of this <see cref="Image"/>.</para>
/// </remarks>
public Image ConvertTo32(Image dst, bool convertAlphaChannel, MidpointRounding rounding)
{
// create destination
if (dst == null)
{
dst = new Image(this.Width, this.Height, 32, this.HorizontalResolution, this.VerticalResolution, this.Transform);
}
else
{
dst.Reallocate(this.Width, this.Height, 32, this.HorizontalResolution, this.VerticalResolution, this.Transform);
}
IPP.Execute(() =>
{
unsafe
{
fixed(ulong *bitsdst = dst.Bits)
{
return(NativeMethods._convert32fto32(
0,
0,
this.Width,
this.Height,
this.Bits,
this.Stride,
(byte *)bitsdst,
dst.Stride8,
convertAlphaChannel,
(int)rounding));
}
}
});
return(dst);
}
public void MinMax(int x, int y, int width, int height, out uint min, out uint max)
{
this.ValidateArea(x, y, width, height);
switch (this.BitsPerPixel)
{
case 1:
if (NativeMethods.is_all_black(1, x, y, width, height, this.Bits, this.Stride))
{
min = max = 1u;
}
else if (NativeMethods.is_all_white(1, x, y, width, height, this.Bits, this.Stride))
{
min = max = 0u;
}
else
{
min = 0u;
max = 1u;
}
break;
case 8:
case 16:
uint localmin = 0;
uint localmax = 0;
IPP.Execute(() =>
{
unsafe
{
fixed(ulong *bits = this.Bits)
{
return(NativeMethods.minmax(
this.BitsPerPixel,
x,
y,
width,
height,
(byte *)bits,
this.Stride8,
out localmin,
out localmax));
}
}
});
min = localmin;
max = localmax;
break;
default:
throw new NotSupportedException(string.Format(
CultureInfo.InvariantCulture,
Properties.Resources.E_UnsupportedDepth,
this.BitsPerPixel));
}
}
/// <summary>
/// Detects straight lines in this <see cref="Image"/>.
/// </summary>
/// <param name="maxLineCount">Minimum number of lines to detect.</param>
/// <param name="threshold">Minimum number of points that are required to detect the line.</param>
/// <param name="minLineLength">Minimum length of the line.</param>
/// <param name="maxLineGap">Maximum length of the gap between lines.</param>
/// <param name="deltaRho">Step of radial discretization.</param>
/// <param name="deltaTheta">Step of angular discretization.</param>
/// <returns>
/// The detected lines.
/// </returns>
/// <exception cref="ArgumentException">
/// <para>The depth of this <see cref="Image"/> is not 8 bit per pixel.</para>
/// </exception>
public Line[] HoughProbLine(int maxLineCount, int threshold, int minLineLength, int maxLineGap, float deltaRho, float deltaTheta)
{
if (this.BitsPerPixel != 8)
{
throw new ArgumentException(Properties.Resources.E_UnsupportedDepth_8bpp);
}
int[] lines = new int[4 * maxLineCount];
int lineCount = 0;
IPP.Execute(() =>
{
unsafe
{
fixed(ulong *bits = this.Bits)
{
return(NativeMethods.houghprobline(
0,
0,
this.Width,
this.Height,
(byte *)bits,
this.Stride8,
maxLineCount,
threshold,
minLineLength,
maxLineGap,
deltaRho,
deltaTheta,
out lineCount,
lines));
}
}
});
// convert answer
Line[] result = new Line[lineCount];
for (int i = 0, j = 0; i < lineCount; i++, j += 4)
{
result[i].X1 = lines[j];
result[i].Y1 = lines[j + 1];
result[i].X2 = lines[j + 2];
result[i].Y2 = lines[j + 3];
}
return(result);
}
public Image ColorKey(Image dst, Image background, uint color)
{
if (background == null)
{
throw new ArgumentNullException(nameof(background));
}
if (this.BitsPerPixel != 8 && this.BitsPerPixel != 24 && this.BitsPerPixel != 32)
{
throw new NotSupportedException(string.Format(
CultureInfo.InvariantCulture,
Properties.Resources.E_UnsupportedDepth,
this.BitsPerPixel));
}
bool inplace = dst == this;
dst = this.CreateTemplate(dst, this.BitsPerPixel);
IPP.Execute(() =>
{
return(NativeMethods.colorkey(
this.BitsPerPixel,
0,
0,
this.Width,
this.Height,
this.Bits,
this.Stride8,
background.Bits,
background.Stride8,
dst.Bits,
dst.Stride8,
color));
});
if (inplace)
{
this.Attach(dst);
return(this);
}
return(dst);
}
public byte Otsu(int x, int y, int width, int height)
{
this.ValidateArea(x, y, width, height);
byte threshold = 0;
IPP.Execute(() =>
{
unsafe
{
fixed(ulong *bits = this.Bits)
{
return(NativeMethods.threshold_otsu(x, y, width, height, (byte *)bits, this.Stride8, out threshold));
}
}
});
return(threshold);
}
/// <summary>
/// Detects straight lines in this <see cref="Image"/>.
/// </summary>
/// <param name="maxLineCount">Minimum number of lines to detect.</param>
/// <param name="threshold">Minimum number of points that are required to detect the line.</param>
/// <param name="deltaRho">Step of radial discretization.</param>
/// <param name="deltaTheta">Step of angular discretization.</param>
/// <returns>
/// The detected lines.
/// </returns>
/// <exception cref="ArgumentException">
/// <para>The depth of this <see cref="Image"/> is not 8 bit per pixel.</para>
/// </exception>
public PointPolarF[] HoughLine(int maxLineCount, int threshold, float deltaRho, float deltaTheta)
{
if (this.BitsPerPixel != 8)
{
throw new ArgumentException(Properties.Resources.E_UnsupportedDepth_8bpp);
}
float[] lines = new float[2 * maxLineCount];
int lineCount = 0;
IPP.Execute(() =>
{
unsafe
{
fixed(ulong *bits = this.Bits)
{
return(NativeMethods.houghline(
0,
0,
this.Width,
this.Height,
(byte *)bits,
this.Stride8,
maxLineCount,
threshold,
deltaRho,
deltaTheta,
out lineCount,
lines));
}
}
});
// convert answer
PointPolarF[] result = new PointPolarF[lineCount];
for (int i = 0, j = 0; i < lineCount; i++, j += 2)
{
result[i].Rho = lines[j];
result[i].Theta = lines[j + 1];
}
return(result);
}
/// <summary>
/// Suppresses the lines on the <see cref="Image"/>.
/// </summary>
/// <returns>
/// A new <see cref="Image"/> with lines suppressed.
/// </returns>
/// <exception cref="NotSupportedException">
/// The <see cref="Image{T}.BitsPerPixel"/> is not 1 or 8.
/// </exception>
public Image SuppressLines()
{
if (this.BitsPerPixel != 1 && this.BitsPerPixel != 8)
{
throw new NotSupportedException(
string.Format(CultureInfo.InvariantCulture, Properties.Resources.E_UnsupportedDepth, this.BitsPerPixel));
}
// IPP does not support 1bpp images - convert to 8bpp
Image src;
bool convert1bpp = false;
if (this.BitsPerPixel == 1)
{
src = this.Convert1To8(null);
convert1bpp = true;
}
else
{
src = this;
}
Image dst = src.Clone(false);
IPP.Execute(() =>
{
return(NativeMethods.supresslines(
src.Width,
src.Height,
src.Stride,
src.Bits,
dst.Bits));
});
// convert back to 1bpp
if (convert1bpp)
{
dst.Convert8To1(dst, 1);
}
return(dst);
}
public Image Canny(Image dst, float thresholdLow, float thresholdHigh, BorderType borderType, uint borderValue)
{
if (this.BitsPerPixel != 8)
{
throw new NotSupportedException(Properties.Resources.E_UnsupportedDepth_8bpp);
}
bool inplace = dst == this;
dst = this.CreateTemplate(dst, this.BitsPerPixel);
IPP.Execute(() =>
{
unsafe
{
fixed(ulong *bitssrc = this.Bits, bitsdst = dst.Bits)
{
return(NativeMethods.canny(
0,
0,
this.Width,
this.Height,
(byte *)bitssrc,
this.Stride8,
(byte *)bitsdst,
dst.Stride8,
thresholdLow,
thresholdHigh,
borderType,
borderValue));
}
}
});
if (inplace)
{
this.Attach(dst);
return(this);
}
return(dst);
}
public Image ThresholdLTGT(Image dst, int x, int y, int width, int height, uint thresholdLT, uint valueLT, uint thresholdGT, uint valueGT)
{
this.ValidateArea(x, y, width, height);
if (this.BitsPerPixel != 8 && this.BitsPerPixel != 24 && this.BitsPerPixel != 32)
{
throw new NotSupportedException(string.Format(
CultureInfo.InvariantCulture,
Properties.Resources.E_UnsupportedDepth,
this.BitsPerPixel));
}
dst = this.Copy(dst, false);
IPP.Execute(() =>
{
unsafe
{
fixed(ulong *bitssrc = this.Bits, bitsdst = dst.Bits)
{
return(NativeMethods.threshold_ltgt_8bpp(
this.BitsPerPixel,
x,
y,
width,
height,
(byte *)bitssrc,
this.Stride8,
(byte *)bitsdst,
dst.Stride8,
thresholdLT,
valueLT,
thresholdGT,
valueGT));
}
}
});
return(dst);
}
/// <summary>
/// Mirrors this <see cref="Image"/> about the specified axis.
/// </summary>
/// <param name="dst">The destination <see cref="Image"/>. Can be <b>null</b>.</param>
/// <param name="flip">The axis to flip the image about.</param>
/// <returns>
/// The destination <see cref="Image"/>.
/// </returns>
/// <exception cref="NotSupportedException">
/// <para>The depth of this <see cref="Image"/> is neither 8 nor 24 nor 32 bits per pixel.</para>
/// </exception>
/// <remarks>
/// <para>If <paramref name="dst"/> is <b>null</b> the method creates new destination <see cref="Image"/> with dimensions of this <see cref="Image"/>.</para>
/// <para>If <paramref name="dst"/> equals this <see cref="Image"/>, the operation is performed in-place.</para>
/// <para>Conversely, the <paramref name="dst"/> is reallocated to the dimensions of this <see cref="Image"/>.</para>
/// </remarks>
public Image Flip(Image dst, FlipAxis flip)
{
if (this.BitsPerPixel != 8 && this.BitsPerPixel != 24 && this.BitsPerPixel != 32)
{
throw new NotSupportedException(string.Format(
CultureInfo.InvariantCulture,
Properties.Resources.E_UnsupportedDepth,
this.BitsPerPixel));
}
if (flip == Imaging.FlipAxis.None)
{
return(this.Copy(dst, true));
}
else
{
dst = this.Copy(dst, false);
IPP.Execute(() =>
{
return(NativeMethods.mirror(
this.BitsPerPixel,
0,
0,
this.Width,
this.Height,
this.Bits,
this.Stride8,
dst == this ? null : dst.Bits,
dst.Stride8,
flip));
});
return(dst);
}
}
/// <summary>
/// Create a <see cref="IntegralImage"/> from the specified <see cref="Image"/>.
/// </summary>
/// <param name="image">The source <see cref="Image"/>.</param>
/// <returns>
/// The <see cref="IntegralImage"/> this method creates.
/// </returns>
/// <exception cref="ArgumentNullException">
/// <paramref name="image"/> is <b>null</b>.
/// </exception>
/// <remarks>
/// <para>The size of resulting integral image is (<paramref name="image"/>.width + 1) * (<paramref name="image"/>.height + 1).</para>
/// </remarks>
public static IntegralImage FromImage(Image image)
{
if (image == null)
{
throw new ArgumentNullException(nameof(image));
}
int bitsPerPixel = image.BitsPerPixel;
if (image.BitsPerPixel > 16)
{
throw new NotSupportedException();
}
int width = image.Width;
int height = image.Height;
IntegralImage dst = new IntegralImage(width + 1, height + 1);
#if false
// IPP version is approximately twice faster
unsafe
{
fixed(ulong *bitssrc = image.Bits)
{
fixed(int *bitsdst = dst.Bits)
{
byte *ptrsrc = (byte *)bitssrc;
uint *ptrdst = (uint *)bitsdst;
int stridesrc = image.Stride8;
int stridedst = dst.Width;
ptrdst += stridedst;
for (int iy = 0; iy < height; iy++, ptrsrc += stridesrc, ptrdst += stridedst)
{
// sum current line
Vectors.CumulativeSum(width, ptrsrc, ptrdst + 1);
// sum with previous line
if (iy > 0)
{
Vectors.Add(stridedst, ptrdst - stridedst, ptrdst);
}
}
}
}
}
#else
IPP.Execute(() =>
{
unsafe
{
fixed(ulong *bitssrc = image.Bits)
{
fixed(int *bitsdst = dst.Bits)
{
return(NativeMethods.integral32s(
width,
height,
(byte *)bitssrc,
image.Stride8,
bitsdst,
dst.Width,
0));
}
}
}
});
#endif
return(dst);
}
public Image Affine(Image dst, System.Windows.Media.Matrix matrix, BorderType borderType, uint borderValue)
{
const float Eps = 1e-8f;
if (matrix.IsIdentity)
{
return(this.Copy(dst, true));
}
// IPP does not support 1bpp images - convert to 8bpp
Image src;
bool convert1bpp = false;
if (this.BitsPerPixel == 1)
{
src = this.Convert1To8(null);
borderValue = borderValue != 0 ? 0u : 255u;
convert1bpp = true;
}
else
{
src = this;
}
// calculate new image size and position
PointD tr = TransformPoint(src.Width, 0);
PointD br = TransformPoint(src.Width, src.Height);
PointD bl = TransformPoint(0, src.Height);
double x1dst = Core.MinMax.Min(bl.X, tr.X, br.X, 0.0);
double x2dst = Core.MinMax.Max(bl.X, tr.X, br.X, 0.0);
double y1dst = Core.MinMax.Min(bl.Y, tr.Y, br.Y, 0.0);
double y2dst = Core.MinMax.Max(bl.Y, tr.Y, br.Y, 0.0);
// translate matrix so the transformed image fits into new frame
matrix.OffsetX = -Core.MinMax.Min(x1dst, x2dst);
matrix.OffsetY = -Core.MinMax.Min(y1dst, y2dst);
// note: add epsilon to avoid rounding problems
int widthdst = (int)Math.Floor(x2dst - x1dst + Eps);
int heightdst = (int)Math.Floor(y2dst - y1dst + Eps);
bool inplace = dst == this;
dst = src.CreateTemplate(dst, widthdst, heightdst, src.BitsPerPixel);
IPP.Execute(() =>
{
return(NativeMethods.affine(
src.BitsPerPixel,
src.Width,
src.Height,
src.Stride,
src.Bits,
dst.Width,
dst.Height,
dst.Stride,
dst.Bits,
matrix.M11,
matrix.M12,
matrix.OffsetX,
matrix.M21,
matrix.M22,
matrix.OffsetY,
(int)borderType,
borderValue));
});
dst.AppendTransform(new MatrixTransform(matrix));
// convert back to 1bpp
if (convert1bpp)
{
dst.Convert8To1(dst, 1);
/*using (Pix pixs = transformedImage.CreatePix())
* {
* using (Pix pixd = pixs.pixOtsu(false))
* {
* if (pixd != null)
* {
* return pixd.CreateImage(transformedImage.HorizontalResolution, transformedImage.VerticalResolution);
* }
* }
* }*/
}
if (inplace)
{
this.Attach(dst);
return(this);
}
return(dst);
PointD TransformPoint(int ptx, int pty)
{
return(new PointD(
(matrix.M11 * ptx) + (matrix.M12 * pty) + matrix.OffsetX,
(matrix.M21 * ptx) + (matrix.M22 * pty) + matrix.OffsetY));
}
}
/// <summary>
/// Scales the <see cref="Image"/> vertically and horizontally without changing its resolution.
/// </summary>
/// <param name="dst">The destination <see cref="Image"/>. Can be <b>null</b>.</param>
/// <param name="width">The desired width of the image, in pixels.</param>
/// <param name="height">The desired height of the image, in pixels.</param>
/// <param name="options">The scaling options.</param>
/// <returns>
/// The destination <see cref="Image"/>.
/// </returns>
public Image ScaleToSize(Image dst, int width, int height, ScalingOptions options)
{
if (width == this.Width && height == this.Height)
{
return(this.Copy(dst, true));
}
if (width <= 0)
{
throw new ArgumentException(Properties.Resources.E_InvalidWidth, nameof(width));
}
if (height <= 0)
{
throw new ArgumentException(Properties.Resources.E_InvalidHeight, nameof(height));
}
System.Windows.Media.Matrix matrix = System.Windows.Media.Matrix.Identity;
matrix.Scale((double)width / this.Width, (double)height / this.Height);
#if false
dst = this.Affine(dst, matrix, BorderType.BorderConst, this.WhiteColor);
Debug.Assert(width == dst.Width && height == dst.Height, "Image dimensions are wrong.");
return(dst);
#else
// IPP does not support 1bpp images - convert to 8bpp
Image src;
bool convert1bpp = false;
if (this.BitsPerPixel == 1)
{
src = this.Convert1To8(null);
convert1bpp = true;
}
else
{
src = this;
}
bool inplace = dst == this;
dst = src.CreateTemplate(dst, width, height, src.BitsPerPixel);
IPP.Execute(() =>
{
return(NativeMethods.resize(
src.BitsPerPixel,
src.Width,
src.Height,
src.Bits,
src.Stride8,
dst.Width,
dst.Height,
dst.Bits,
dst.Stride8,
options.InterpolationType,
options.Antialiasing,
options.ValueB,
options.ValueC,
options.Lobes,
BorderType.BorderConst,
src.WhiteColor));
});
dst.AppendTransform(new MatrixTransform(matrix));
// convert back to 1bpp
if (convert1bpp)
{
dst.Convert8To1(dst, 1);
}
if (inplace)
{
this.Attach(dst);
return(this);
}
return(dst);
#endif
}