Brightness method shows "Out of memory" exception

To change brightness of an image in c#.net 4 i have used the following method.

public void SetBrightness(int brightness)
{
imageHandler.RestorePrevious();
if (brightness < -255) brightness = -255;
if (brightness > 255) brightness = 255;
ColorMatrix cMatrix = new ColorMatrix(CurrentColorMatrix.Array);
cMatrix.Matrix40 = cMatrix.Matrix41 = cMatrix.Matrix42 = brightness / 255.0F;
imageHandler.ProcessBitmap(cMatrix);
}

internal void ProcessBitmap(ColorMatrix colorMatrix)
{
Bitmap bmap = new Bitmap(_currentBitmap.Width, _currentBitmap.Height)

ImageAttributes imgAttributes = new ImageAttributes();
imgAttributes.SetColorMatrix(colorMatrix);
Graphics g = Graphics.FromImage(bmap);
g.InterpolationMode = InterpolationMode.NearestNeighbor;
g.DrawImage(_currentBitmap, new Rectangle(0, 0, _currentBitmap.Width,
_currentBitmap.Height), 0, 0, _currentBitmap.Width,
_currentBitmap.Height, GraphicsUnit.Pixel, imgAttributes);
_currentBitmap = (Bitmap)bmap.Clone();

}

If brightness is changed several times then "Out of memory" exception is shown. I have tried to use "Using block" but went in vein.

Any ideas?

please see the link
http://www.codeproject.com/Articles/227016/Image-Processing-using-Matrices-in-Csharp
and suggest if any types of optimization is possible in the methods (Rotation, brightness, crop and undo).

1 Reply

Know the answer? Post it — somebody with the same question will find it here.

Sam Hobbs14y ago
Use try/catch blocks to catch errors. Also debug the program and look at the line that gets the error, especially the data. Catastrphic errors such as this are often the result of ignoring errors. Your program might have gotten an error previously that it ignored and that resulted in an error that you think is not possible.

Programmers ten to be lazy about error detection. Sample code seldom does it adequately. You need to add code to check for errors. You need to do that before asking for help such as here.

If after adding adquate error detection and then debugging the program if needed, then provide more information, either in this thread or in a subsequent thread.