Mixing
get an average image from multiple Emgu.Cv.Mat
0
I have to get an average image from a set of images using Emgu.CV. The Input Images are Image<Gray,byte> (1 channel, 1 byte pixels). I have written this method but it does not seam to work:
public static Mat GetAverage(List<Mat> matrices)
{
//where to store the result
Mat result = new Mat(matrices.First().Size,
DepthType.Cv16U,
matrices.First().NumberOfChannels);
//where to store the partial sums
using (Mat elementwiseSum = new Mat(matrices.First().Size,
DepthType.Cv64F,
matrices.First().NumberOfChannels))
{
// loop over the input
foreach (Mat matrix in matrices)
{
// sum each image to the partial sum
CvInvoke.Accumulate(matrix, elementwiseSum);
}
// convert to UInt16 and scale by the number of input images
elementwiseSum.ConvertTo(result,
DepthType.Cv16U,
1.0 / matrices.Count);
}
return result;
}
Both elementwiseSum and result seam to be black images... What am I doing wrong?
c# image emgucv
edited Nov 20 '18 at 16:15
Ɖiamond ǤeezeƦ
2,65532136
asked Nov 20 '18 at 16:09
Nicolo' B.Nicolo' B.
11
add a comment |
0
I have to get an average image from a set of images using Emgu.CV. The Input Images are Image<Gray,byte> (1 channel, 1 byte pixels). I have written this method but it does not seam to work:
public static Mat GetAverage(List<Mat> matrices)
{
//where to store the result
Mat result = new Mat(matrices.First().Size,
DepthType.Cv16U,
matrices.First().NumberOfChannels);
//where to store the partial sums
using (Mat elementwiseSum = new Mat(matrices.First().Size,
DepthType.Cv64F,
matrices.First().NumberOfChannels))
{
// loop over the input
foreach (Mat matrix in matrices)
{
// sum each image to the partial sum
CvInvoke.Accumulate(matrix, elementwiseSum);
}
// convert to UInt16 and scale by the number of input images
elementwiseSum.ConvertTo(result,
DepthType.Cv16U,
1.0 / matrices.Count);
}
return result;
}
Both elementwiseSum and result seam to be black images... What am I doing wrong?
c# image emgucv
edited Nov 20 '18 at 16:15
Ɖiamond ǤeezeƦ
2,65532136
asked Nov 20 '18 at 16:09
Nicolo' B.Nicolo' B.
11
How do you visualize elementwiseSum and result? Are you using Imshow?
– Quergo
Nov 20 '18 at 20:34
I tried to run your code with 2 images and I see strange result. When I useCvInvoke.Imshow(), theelementwiseSumis completely white and theresultis completely black. But when I show them to aPictureBox, it showed the combination of the 2 images.
– Ha Bom
Nov 21 '18 at 5:00
All theMatin theListhave the same size?
– Ha Bom
Nov 21 '18 at 5:01
Dear all, I visualized the results by drawing the Mat.Bitmapin a windows.Form.PictureBox and yes the images have the same size (I use the same picture multiple times for testing the method)
– Nicolo' B.
Nov 21 '18 at 17:17
Usually there may be problems when trying to directly visualize images with depth > 8bit. Try to convert your result image to Cv8U and visualize it.
– Quergo
Nov 22 '18 at 11:00
add a comment |
0
0
0
I have to get an average image from a set of images using Emgu.CV. The Input Images are Image<Gray,byte> (1 channel, 1 byte pixels). I have written this method but it does not seam to work:
public static Mat GetAverage(List<Mat> matrices)
{
//where to store the result
Mat result = new Mat(matrices.First().Size,
DepthType.Cv16U,
matrices.First().NumberOfChannels);
//where to store the partial sums
using (Mat elementwiseSum = new Mat(matrices.First().Size,
DepthType.Cv64F,
matrices.First().NumberOfChannels))
{
// loop over the input
foreach (Mat matrix in matrices)
{
// sum each image to the partial sum
CvInvoke.Accumulate(matrix, elementwiseSum);
}
// convert to UInt16 and scale by the number of input images
elementwiseSum.ConvertTo(result,
DepthType.Cv16U,
1.0 / matrices.Count);
}
return result;
}
Both elementwiseSum and result seam to be black images... What am I doing wrong?
c# image emgucv
edited Nov 20 '18 at 16:15
Ɖiamond ǤeezeƦ
2,65532136
asked Nov 20 '18 at 16:09
Nicolo' B.Nicolo' B.
11
I have to get an average image from a set of images using Emgu.CV. The Input Images are Image<Gray,byte> (1 channel, 1 byte pixels). I have written this method but it does not seam to work:
public static Mat GetAverage(List<Mat> matrices)
{
//where to store the result
Mat result = new Mat(matrices.First().Size,
DepthType.Cv16U,
matrices.First().NumberOfChannels);
//where to store the partial sums
using (Mat elementwiseSum = new Mat(matrices.First().Size,
DepthType.Cv64F,
matrices.First().NumberOfChannels))
{
// loop over the input
foreach (Mat matrix in matrices)
{
// sum each image to the partial sum
CvInvoke.Accumulate(matrix, elementwiseSum);
}
// convert to UInt16 and scale by the number of input images
elementwiseSum.ConvertTo(result,
DepthType.Cv16U,
1.0 / matrices.Count);
}
return result;
}
Both elementwiseSum and result seam to be black images... What am I doing wrong?
c# image emgucv
c# image emgucv
edited Nov 20 '18 at 16:15
Ɖiamond ǤeezeƦ
2,65532136
asked Nov 20 '18 at 16:09
Nicolo' B.Nicolo' B.
11
edited Nov 20 '18 at 16:15
Ɖiamond ǤeezeƦ
2,65532136
asked Nov 20 '18 at 16:09
Nicolo' B.Nicolo' B.
11
edited Nov 20 '18 at 16:15
Ɖiamond ǤeezeƦ
2,65532136
edited Nov 20 '18 at 16:15
Ɖiamond ǤeezeƦ
2,65532136
edited Nov 20 '18 at 16:15
Ɖiamond ǤeezeƦ
2,65532136
2,65532136
asked Nov 20 '18 at 16:09
Nicolo' B.Nicolo' B.
11
asked Nov 20 '18 at 16:09
Nicolo' B.Nicolo' B.
11
asked Nov 20 '18 at 16:09
Nicolo' B.Nicolo' B.
11
11
How do you visualize elementwiseSum and result? Are you using Imshow?
– Quergo
Nov 20 '18 at 20:34
I tried to run your code with 2 images and I see strange result. When I useCvInvoke.Imshow(), theelementwiseSumis completely white and theresultis completely black. But when I show them to aPictureBox, it showed the combination of the 2 images.
– Ha Bom
Nov 21 '18 at 5:00
All theMatin theListhave the same size?
– Ha Bom
Nov 21 '18 at 5:01
Dear all, I visualized the results by drawing the Mat.Bitmapin a windows.Form.PictureBox and yes the images have the same size (I use the same picture multiple times for testing the method)
– Nicolo' B.
Nov 21 '18 at 17:17
Usually there may be problems when trying to directly visualize images with depth > 8bit. Try to convert your result image to Cv8U and visualize it.
– Quergo
Nov 22 '18 at 11:00
add a comment |
How do you visualize elementwiseSum and result? Are you using Imshow?
– Quergo
Nov 20 '18 at 20:34
I tried to run your code with 2 images and I see strange result. When I useCvInvoke.Imshow(), theelementwiseSumis completely white and theresultis completely black. But when I show them to aPictureBox, it showed the combination of the 2 images.
– Ha Bom
Nov 21 '18 at 5:00
All theMatin theListhave the same size?
– Ha Bom
Nov 21 '18 at 5:01
Dear all, I visualized the results by drawing the Mat.Bitmapin a windows.Form.PictureBox and yes the images have the same size (I use the same picture multiple times for testing the method)
– Nicolo' B.
Nov 21 '18 at 17:17
Usually there may be problems when trying to directly visualize images with depth > 8bit. Try to convert your result image to Cv8U and visualize it.
– Quergo
Nov 22 '18 at 11:00
How do you visualize elementwiseSum and result? Are you using Imshow?
– Quergo
Nov 20 '18 at 20:34
How do you visualize elementwiseSum and result? Are you using Imshow?
– Quergo
Nov 20 '18 at 20:34
I tried to run your code with 2 images and I see strange result. When I use
CvInvoke.Imshow(), the elementwiseSum is completely white and the result is completely black. But when I show them to a PictureBox, it showed the combination of the 2 images.– Ha Bom
Nov 21 '18 at 5:00
I tried to run your code with 2 images and I see strange result. When I use
CvInvoke.Imshow(), the elementwiseSum is completely white and the result is completely black. But when I show them to a PictureBox, it showed the combination of the 2 images.– Ha Bom
Nov 21 '18 at 5:00
All the
Mat in the List have the same size?– Ha Bom
Nov 21 '18 at 5:01
All the
Mat in the List have the same size?– Ha Bom
Nov 21 '18 at 5:01
Dear all, I visualized the results by drawing the Mat.Bitmapin a windows.Form.PictureBox and yes the images have the same size (I use the same picture multiple times for testing the method)
– Nicolo' B.
Nov 21 '18 at 17:17
Dear all, I visualized the results by drawing the Mat.Bitmapin a windows.Form.PictureBox and yes the images have the same size (I use the same picture multiple times for testing the method)
– Nicolo' B.
Nov 21 '18 at 17:17
Usually there may be problems when trying to directly visualize images with depth > 8bit. Try to convert your result image to Cv8U and visualize it.
– Quergo
Nov 22 '18 at 11:00
Usually there may be problems when trying to directly visualize images with depth > 8bit. Try to convert your result image to Cv8U and visualize it.
– Quergo
Nov 22 '18 at 11:00
add a comment |
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How do you visualize elementwiseSum and result? Are you using Imshow?
– Quergo
Nov 20 '18 at 20:34
I tried to run your code with 2 images and I see strange result. When I use
CvInvoke.Imshow(), theelementwiseSumis completely white and theresultis completely black. But when I show them to aPictureBox, it showed the combination of the 2 images.– Ha Bom
Nov 21 '18 at 5:00
All the
Matin theListhave the same size?– Ha Bom
Nov 21 '18 at 5:01
Dear all, I visualized the results by drawing the Mat.Bitmapin a windows.Form.PictureBox and yes the images have the same size (I use the same picture multiple times for testing the method)
– Nicolo' B.
Nov 21 '18 at 17:17
Usually there may be problems when trying to directly visualize images with depth > 8bit. Try to convert your result image to Cv8U and visualize it.
– Quergo
Nov 22 '18 at 11:00