[C#] GrayScale (by ColorMatrix) causes OutOfMemoryException. Why ?
- by Tony
I have 2 forms, A and B. On the Form A, I click a button and an Image is being loaded to a PictureBox located ona the Form B. And, I want to set GrayScale to this image by:
public void SetGrayScale(PictureBox pb)
{
ColorMatrix matrix = new ColorMatrix(new float[][]
{
new float[] {0.299f, 0.299f, 0.299f, 0, 0},
new float[] {0.587f, 0.587f, 0.587f, 0, 0},
new float[] {0.114f, 0.114f, 0.114f, 0, 0},
new float[] { 0, 0, 0, 1, 0},
new float[] { 0, 0, 0, 0, 0}
});
Image image = (Bitmap)pb.Image.Clone();
ImageAttributes attributes = new ImageAttributes();
attributes.SetColorMatrix(matrix);
Graphics graphics = Graphics.FromImage(image);
graphics.DrawImage(image,
new Rectangle(0, 0, image.Width, image.Height),
0,
0,
image.Width,
image.Height,
GraphicsUnit.Pixel,
attributes);
graphics.Dispose();
pb.Image = image;
}
This code works properly when the PictureBox is on the same form (A). But, when it is on the Form B, the OutOfMemoryException is raised. Why ?
