/// <summary>
///
/// </summary>
/// <param name="blobs"></param>
/// <param name="imgSrc"></param>
/// <param name="imgDst"></param>
/// <param name="mode"></param>
/// <param name="alpha"></param>
public static void PerformMany(CvBlobs blobs, Mat imgSrc, Mat imgDst, RenderBlobsModes mode, double alpha)
{
if (blobs == null)
{
throw new ArgumentNullException(nameof(blobs));
}
if (imgSrc == null)
{
throw new ArgumentNullException(nameof(imgSrc));
}
if (imgDst == null)
{
throw new ArgumentNullException(nameof(imgDst));
}
if (imgDst.Type() != MatType.CV_8UC3)
{
throw new ArgumentException("'img' must be a 3-channel U8 image.");
}
if (blobs.Labels == null)
{
throw new NotSupportedException("blobs.Labels == null");
}
var palette = new Dictionary <int, Scalar>();
if ((mode & RenderBlobsModes.Color) == RenderBlobsModes.Color)
{
int colorCount = 0;
foreach (var kv in blobs)
{
Hsv2Rgb((colorCount * 77) % 360, 0.5, 1.0, out var r, out var g, out var b);
colorCount++;
palette[kv.Key] = new Scalar(b, g, r);
}
}
foreach (var kv in blobs)
{
Scalar color = default;
if (palette.ContainsKey(kv.Key))
{
color = palette[kv.Key];
}
PerformOne(blobs.Labels, kv.Value, imgSrc, imgDst, mode, color, alpha);
}
}
/// <summary>
/// Draws or prints information about blobs. (cvRenderBlobs)
/// </summary>
/// <param name="blobs">List of blobs.</param>
/// <param name="imgSource">Input image (depth=IPL_DEPTH_8U and num. channels=3).</param>
/// <param name="imgDest">Output image (depth=IPL_DEPTH_8U and num. channels=3).</param>
/// <param name="mode">Render mode. By default is CV_BLOB_RENDER_COLOR|CV_BLOB_RENDER_CENTROID|CV_BLOB_RENDER_BOUNDING_BOX|CV_BLOB_RENDER_ANGLE.</param>
/// <param name="alpha">If mode CV_BLOB_RENDER_COLOR is used. 1.0 indicates opaque and 0.0 translucent (1.0 by default).</param>
public static void RenderBlobs(CvBlobs blobs, Mat imgSource, Mat imgDest, RenderBlobsModes mode, double alpha = 1.0)
{
if (blobs == null)
{
throw new ArgumentNullException(nameof(blobs));
}
if (imgSource == null)
{
throw new ArgumentNullException(nameof(imgSource));
}
if (imgDest == null)
{
throw new ArgumentNullException(nameof(imgDest));
}
BlobRenderer.PerformMany(blobs, imgSource, imgDest, mode, alpha);
}
/// <summary>
/// Draws or prints information about a blob.
/// </summary>
/// <param name="labels">Label data.</param>
/// <param name="blob">Blob.</param>
/// <param name="imgSource">Input image (depth=IPL_DEPTH_8U and num. channels=3).</param>
/// <param name="imgDest">Output image (depth=IPL_DEPTH_8U and num. channels=3).</param>
/// <param name="mode">Render mode. By default is CV_BLOB_RENDER_COLOR|CV_BLOB_RENDER_CENTROID|CV_BLOB_RENDER_BOUNDING_BOX|CV_BLOB_RENDER_ANGLE.</param>
/// <param name="color">Color to render (if CV_BLOB_RENDER_COLOR is used).</param>
/// <param name="alpha">If mode CV_BLOB_RENDER_COLOR is used. 1.0 indicates opaque and 0.0 translucent (1.0 by default).</param>
public static void RenderBlob(LabelData labels, CvBlob blob, Mat imgSource, Mat imgDest,
RenderBlobsModes mode, Scalar color, double alpha = 1.0)
{
if (labels == null)
{
throw new ArgumentNullException(nameof(labels));
}
if (blob == null)
{
throw new ArgumentNullException(nameof(blob));
}
if (imgSource == null)
{
throw new ArgumentNullException(nameof(imgSource));
}
if (imgDest == null)
{
throw new ArgumentNullException(nameof(imgDest));
}
BlobRenderer.PerformOne(labels, blob, imgSource, imgDest, mode, color, alpha);
}
/// <summary>
///
/// </summary>
/// <param name="labels"></param>
/// <param name="blob"></param>
/// <param name="imgSrc"></param>
/// <param name="imgDst"></param>
/// <param name="mode"></param>
/// <param name="color"></param>
/// <param name="alpha"></param>
public static void PerformOne(LabelData labels, CvBlob blob, Mat imgSrc, Mat imgDst,
RenderBlobsModes mode, Scalar color, double alpha)
{
if (labels == null)
{
throw new ArgumentNullException(nameof(labels));
}
if (blob == null)
{
throw new ArgumentNullException(nameof(blob));
}
if (imgSrc == null)
{
throw new ArgumentNullException(nameof(imgSrc));
}
if (imgDst == null)
{
throw new ArgumentNullException(nameof(imgDst));
}
if (imgDst.Type() != MatType.CV_8UC3)
{
throw new ArgumentException("'img' must be a 3-channel U8 image.");
}
if ((mode & RenderBlobsModes.Color) == RenderBlobsModes.Color)
{
var pSrc = imgSrc.GetGenericIndexer <Vec3b>();
var pDst = imgDst.GetGenericIndexer <Vec3b>();
for (int r = blob.MinY; r <= blob.MaxY; r++)
{
for (int c = blob.MinX; c <= blob.MaxX; c++)
{
if (labels[r, c] == blob.Label)
{
byte v0 = (byte)((1.0 - alpha) * pSrc[r, c].Item0 + alpha * color.Val0);
byte v1 = (byte)((1.0 - alpha) * pSrc[r, c].Item1 + alpha * color.Val1);
byte v2 = (byte)((1.0 - alpha) * pSrc[r, c].Item2 + alpha * color.Val2);
pDst[r, c] = new Vec3b(v0, v1, v2);
}
}
}
}
if (mode != RenderBlobsModes.None)
{
if ((mode & RenderBlobsModes.BoundingBox) == RenderBlobsModes.BoundingBox)
{
Cv2.Rectangle(
imgDst,
new Point(blob.MinX, blob.MinY),
new Point(blob.MaxX, blob.MaxY),
new Scalar(255, 0, 0));
}
if ((mode & RenderBlobsModes.Angle) == RenderBlobsModes.Angle)
{
double angle = blob.Angle();
double lengthLine = Math.Max(blob.MaxX - blob.MinX, blob.MaxY - blob.MinY) / 2.0;
double x1 = blob.Centroid.X - lengthLine * Math.Cos(angle);
double y1 = blob.Centroid.Y - lengthLine * Math.Sin(angle);
double x2 = blob.Centroid.X + lengthLine * Math.Cos(angle);
double y2 = blob.Centroid.Y + lengthLine * Math.Sin(angle);
Cv2.Line(imgDst, new Point((int)x1, (int)y1), new Point((int)x2, (int)y2),
new Scalar(0, 255, 0));
}
if ((mode & RenderBlobsModes.Centroid) == RenderBlobsModes.Centroid)
{
Cv2.Line(imgDst,
new Point((int)blob.Centroid.X - 3, (int)blob.Centroid.Y),
new Point((int)blob.Centroid.X + 3, (int)blob.Centroid.Y),
new Scalar(255, 0, 0));
Cv2.Line(imgDst,
new Point((int)blob.Centroid.X, (int)blob.Centroid.Y - 3),
new Point((int)blob.Centroid.X, (int)blob.Centroid.Y + 3),
new Scalar(255, 0, 0));
}
}
}
/// <summary>
/// Draws or prints information about a blob.
/// </summary>
/// <param name="labels">Label data.</param>
/// <param name="blob">Blob.</param>
/// <param name="imgSource">Input image (depth=IPL_DEPTH_8U and num. channels=3).</param>
/// <param name="imgDest">Output image (depth=IPL_DEPTH_8U and num. channels=3).</param>
/// <param name="mode">Render mode. By default is CV_BLOB_RENDER_COLOR|CV_BLOB_RENDER_CENTROID|CV_BLOB_RENDER_BOUNDING_BOX|CV_BLOB_RENDER_ANGLE.</param>
public static void RenderBlob(LabelData labels, CvBlob blob, Mat imgSource, Mat imgDest,
RenderBlobsModes mode)
{
RenderBlob(labels, blob, imgSource, imgDest, mode, Scalar.White, 1.0);
}
/// <summary>
/// Draws or prints information about blobs. (cvRenderBlobs)
/// </summary>
/// <param name="imgSource">Input image (depth=IPL_DEPTH_8U and num. channels=3).</param>
/// <param name="imgDest">Output image (depth=IPL_DEPTH_8U and num. channels=3).</param>
/// <param name="mode">Render mode. By default is CV_BLOB_RENDER_COLOR|CV_BLOB_RENDER_CENTROID|CV_BLOB_RENDER_BOUNDING_BOX|CV_BLOB_RENDER_ANGLE.</param>
/// <param name="alpha">If mode CV_BLOB_RENDER_COLOR is used. 1.0 indicates opaque and 0.0 translucent (1.0 by default).</param>
public void RenderBlobs(Mat imgSource, Mat imgDest, RenderBlobsModes mode, double alpha)
{
CvBlobLib.RenderBlobs(this, imgSource, imgDest, mode, alpha);
}
/// <summary>
/// Draws or prints information about blobs. (cvRenderBlobs)
/// </summary>
/// <param name="imgSource">Input image (depth=IPL_DEPTH_8U and num. channels=3).</param>
/// <param name="imgDest">Output image (depth=IPL_DEPTH_8U and num. channels=3).</param>
/// <param name="mode">Render mode. By default is CV_BLOB_RENDER_COLOR|CV_BLOB_RENDER_CENTROID|CV_BLOB_RENDER_BOUNDING_BOX|CV_BLOB_RENDER_ANGLE.</param>
public void RenderBlobs(Mat imgSource, Mat imgDest, RenderBlobsModes mode)
{
CvBlobLib.RenderBlobs(this, imgSource, imgDest, mode);
}