EmguCV image rotation

Question

3.00/5 (1 vote)

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i use this code

C#

private void button12_Click(object sender, EventArgs e)
{
    Bitmap bm = new Bitmap(pictureBox1.Image);
   Image<Gray, byte> img = new Image<Gray, byte>(bm);
    double x = 20;
    img.Rotate(x, new Gray(255));
    pictureBox9.Image = img.ToBitmap();

}

for image rotation
but it doesn't work ,
why????

Posted 8-Jan-12 7:59am

elgammal

Updated 9-Jan-12 10:41am

v3

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Comments

Sergey Alexandrovich Kryukov 9-Jan-12 0:25am

First of all, it won't even compile. :-) Please format your code properly.
--SA

elgammal 9-Jan-12 16:37pm

Iam so sorry for this error ,
i don't how it is copied with this shape
this my actual code

private void button12_Click(object sender, EventArgs e)
{
Bitmap bm = new Bitmap(pictureBox1.Image);
Image<gray,byte> img = new Image<gray,byte>(bm);
double x = 20;
img.Rotate(x, new Gray(255));
pictureBox9.Image = img.ToBitmap();
}

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MrCancer91 · Answer 1 · 2015-06-21T01:22:00

follow this link: http://www.emgu.com/wiki/files/1.4.0.0/html/ae9c1603-5135-1a2f-bd46-1dd736d4d7a8.htm[^]

You will see the Rotate method also has an argument called crop, set this argument false and all information of your image will be preserved.

I think your code should be changed into:

C#

img = img.Rotate(x, new Gray(255),false);

Hope this will help you!

Kethu Sasikanth · Answer 2 · 2012-01-09T15:44:00

You may have to try this:
Image<Gray,Byte> imgOut= img.Rotate(x, new Gray(255));
pictureBox9.Image= imgOut.ToBitmap();

I did not compile, even though i have emgucv on my machine, but I looked into their libray. I believe you should call like I said above.

see their implementation:
public Image<TColor, TDepth> WarpAffine<TMapDepth>(Matrix<TMapDepth> mapMatrix, int width, int height, INTER interpolationType, WARP warpType, TColor backgroundColor) where TMapDepth: new()
{
Image<TColor, TDepth> image = new Image<TColor, TDepth>(width, height);
//this call externs c function
CvInvoke.cvWarpAffine(base.Ptr, image.Ptr, mapMatrix.Ptr, (int) (interpolationType | ((INTER) ((int) warpType))), backgroundColor.MCvScalar);
return image;
}

kusofist · Answer 3 · 2012-04-26T09:36:00

Solution 2

Well, in case of "it doesn't work".
The problem is not that complected.

change this line
img.Rotate(x, new Gray(255));

to
img = img.Rotate(x, new Gray(255));

Posted 26-Apr-12 9:36am

kusofist

EmguCV image rotation

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