private void detectQuads(Bitmap bitmap)
{
// Greyscale
filteredBitmap = Grayscale.CommonAlgorithms.BT709.Apply(bitmap);
// edge filter
SobelEdgeDetector edgeFilter = new SobelEdgeDetector();
edgeFilter.ApplyInPlace(filteredBitmap);
// Threshhold filter
Threshold threshholdFilter = new Threshold(190);
threshholdFilter.ApplyInPlace(filteredBitmap);
BitmapData bitmapData = filteredBitmap.LockBits(
new Rectangle(0, 0, filteredBitmap.Width, filteredBitmap.Height),
ImageLockMode.ReadWrite, filteredBitmap.PixelFormat);
BlobCounter blobCounter = new BlobCounter();
blobCounter.FilterBlobs = true;
blobCounter.MinHeight = 125;
blobCounter.MinWidth = 125;
blobCounter.ProcessImage(bitmapData);
Blob[] blobs = blobCounter.GetObjectsInformation();
filteredBitmap.UnlockBits(bitmapData);
SimpleShapeChecker shapeChecker = new SimpleShapeChecker();
Bitmap bm = new Bitmap(filteredBitmap.Width, filteredBitmap.Height, PixelFormat.Format24bppRgb);
Graphics g = Graphics.FromImage(bm);
g.DrawImage(filteredBitmap, 0, 0);
Pen pen = new Pen(Color.Red, 5);
List<IntPoint> cardPositions = new List<IntPoint>();
// Loop through detected shapes
for (int i = 0, n = blobs.Length; i < n; i++)
{
List<IntPoint> edgePoints = blobCounter.GetBlobsEdgePoints(blobs[i]);
List<IntPoint> corners;
bool sameCard = false;
// is triangle or quadrilateral
if (shapeChecker.IsConvexPolygon(edgePoints, out corners))
{
// get sub-type
PolygonSubType subType = shapeChecker.CheckPolygonSubType(corners);
// Only return 4 corner rectanges
if ((subType == PolygonSubType.Parallelogram || subType == PolygonSubType.Rectangle) && corners.Count == 4)
{
// Check if its sideways, if so rearrange the corners so it's veritcal
rearrangeCorners(corners);
// Prevent it from detecting the same card twice
foreach (IntPoint point in cardPositions)
{
if (corners[0].DistanceTo(point) < 40)
sameCard = true;
}
if (sameCard)
continue;
// Hack to prevent it from detecting smaller sections of the card instead of the whole card
if (GetArea(corners) < 20000)
continue;
cardPositions.Add(corners[0]);
g.DrawPolygon(pen, ToPointsArray(corners));
// Extract the card bitmap
QuadrilateralTransformation transformFilter = new QuadrilateralTransformation(corners, 211, 298);
cardBitmap = transformFilter.Apply(cameraBitmap);
List<IntPoint> artCorners = new List<IntPoint>();
artCorners.Add(new IntPoint(14, 35));
artCorners.Add(new IntPoint(193, 35));
artCorners.Add(new IntPoint(193, 168));
artCorners.Add(new IntPoint(14, 168));
// Extract the art bitmap
QuadrilateralTransformation cartArtFilter = new QuadrilateralTransformation(artCorners, 183, 133);
cardArtBitmap = cartArtFilter.Apply(cardBitmap);
MagicCard card = new MagicCard();
card.corners = corners;
card.cardBitmap = cardBitmap;
card.cardArtBitmap = cardArtBitmap;
magicCards.Add(card);
}
}
}
pen.Dispose();
g.Dispose();
filteredBitmap = bm;
}
private void detectQuads(Bitmap bitmap)
{
// Greyscale
filteredBitmap = Grayscale.CommonAlgorithms.BT709.Apply(bitmap);
// edge filter
SobelEdgeDetector edgeFilter = new SobelEdgeDetector();
edgeFilter.ApplyInPlace(filteredBitmap);
// Threshhold filter
Threshold threshholdFilter = new Threshold(190);
threshholdFilter.ApplyInPlace(filteredBitmap);
BitmapData bitmapData = filteredBitmap.LockBits(
new Rectangle(0, 0, filteredBitmap.Width, filteredBitmap.Height),
ImageLockMode.ReadWrite, filteredBitmap.PixelFormat);
BlobCounter blobCounter = new BlobCounter();
blobCounter.FilterBlobs = true;
blobCounter.MinHeight = 125;
blobCounter.MinWidth = 125;
blobCounter.ProcessImage(bitmapData);
Blob[] blobs = blobCounter.GetObjectsInformation();
filteredBitmap.UnlockBits(bitmapData);
SimpleShapeChecker shapeChecker = new SimpleShapeChecker();
Bitmap bm = new Bitmap(filteredBitmap.Width, filteredBitmap.Height, PixelFormat.Format24bppRgb);
Graphics g = Graphics.FromImage(bm);
g.DrawImage(filteredBitmap, 0, 0);
Pen pen = new Pen(Color.Red, 5);
List <IntPoint> cardPositions = new List <IntPoint>();
// Loop through detected shapes
for (int i = 0, n = blobs.Length; i < n; i++)
{
List <IntPoint> edgePoints = blobCounter.GetBlobsEdgePoints(blobs[i]);
List <IntPoint> corners;
bool sameCard = false;
// is triangle or quadrilateral
if (shapeChecker.IsConvexPolygon(edgePoints, out corners))
{
// get sub-type
PolygonSubType subType = shapeChecker.CheckPolygonSubType(corners);
// Only return 4 corner rectanges
if ((subType == PolygonSubType.Parallelogram || subType == PolygonSubType.Rectangle) && corners.Count == 4)
{
// Check if its sideways, if so rearrange the corners so it's veritcal
rearrangeCorners(corners);
// Prevent it from detecting the same card twice
foreach (IntPoint point in cardPositions)
{
if (corners[0].DistanceTo(point) < 40)
{
sameCard = true;
}
}
if (sameCard)
{
continue;
}
// Hack to prevent it from detecting smaller sections of the card instead of the whole card
if (GetArea(corners) < 20000)
{
continue;
}
cardPositions.Add(corners[0]);
g.DrawPolygon(pen, ToPointsArray(corners));
// Extract the card bitmap
QuadrilateralTransformation transformFilter = new QuadrilateralTransformation(corners, 211, 298);
cardBitmap = transformFilter.Apply(cameraBitmap);
List <IntPoint> artCorners = new List <IntPoint>();
artCorners.Add(new IntPoint(14, 35));
artCorners.Add(new IntPoint(193, 35));
artCorners.Add(new IntPoint(193, 168));
artCorners.Add(new IntPoint(14, 168));
// Extract the art bitmap
QuadrilateralTransformation cartArtFilter = new QuadrilateralTransformation(artCorners, 183, 133);
cardArtBitmap = cartArtFilter.Apply(cardBitmap);
MagicCard card = new MagicCard();
card.corners = corners;
card.cardBitmap = cardBitmap;
card.cardArtBitmap = cardArtBitmap;
magicCards.Add(card);
}
}
}
pen.Dispose();
g.Dispose();
filteredBitmap = bm;
}