CV image flipping, emgucv image rotation "recommended collection"

Hello everyone , I meet you again , I'm your friend, Quan Jun .

i use this codeprivate void button12_Click(object sender, EventArgs e)

{

Bitmap bm = new Bitmap(pictureBox1.Image);

Image img = new Image(bm);

double x = 20;

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

pictureBox9.Image = img.ToBitmap();

}

for image rotation

but it doesn’t work ,

why????

Solution 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:

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

Hope this will help you!

You may have to try this:

Image 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 WarpAffine(Matrix mapMatrix, int width, int height, INTER interpolationType, WARP warpType, TColor backgroundColor) where TMapDepth: new()

{

Image image = new Image(width, height);

//this call externs c function

CvInvoke.cvWarpAffine(base.Ptr, image.Ptr, mapMatrix.Ptr, (int) (interpolationType | ((INTER) ((int) warpType))), backgroundColor.MCvScalar);

return image;

}

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));

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