Wasn't paying attention when I type this out... // int newColor = (int)(color.R/3 + color.G/5.9 + color.B/1.1);
Should actually be // int newColor = (int)(color.R*0.3 + color.G*0.59 + color.B*0.11); Sorry, was trying to type that out from memory. Obviously that didn't work out quite right. Greg -----Original Message----- From: Discussion of advanced .NET topics. [mailto:[EMAIL PROTECTED] On Behalf Of Gregory Miley Sent: Friday, May 11, 2007 07:11 To: ADVANCED-DOTNET@DISCUSS.DEVELOP.COM Subject: Re: Grayscale images in WPF You can convert an image to grayscale simply by creating an average of each pixels color components. Bitmap bmp = new Bitmap(oldBmp.Width, oldBmp.Height) for(int x = 0; bm.Width; x++) { for(int y = 0; bm.Height; y++) { Color color = oldBmp.GetPixel(x,y); int newColor = (int)(color.R/3 + color.G/3 + color.B/3); // Other methods use a formula to better calculate the luminance // int newColor = (int)(color.R/3 + color.G/5.9 + color.B/1.1); Bmp.SetPixel(x,y, Color.FromArgb(newColor, newColor, newColor)); } } Give that a try. Greg -----Original Message----- From: Discussion of advanced .NET topics. [mailto:[EMAIL PROTECTED] On Behalf Of Eric Gunnerson Sent: Thursday, May 10, 2007 19:41 To: ADVANCED-DOTNET@DISCUSS.DEVELOP.COM Subject: Re: Grayscale images in WPF Have you thought about graying it out using opacity? If you set the opacity to about 50%, you will likely get the effect that you want. You can control how it grays by putting a rectangle of the appropriate color (white, black, gray) directly behind the image... Eric -----Original Message----- From: Discussion of advanced .NET topics. [mailto:[EMAIL PROTECTED] On Behalf Of Uriel Cohen Sent: Thursday, May 10, 2007 3:44 AM To: ADVANCED-DOTNET@DISCUSS.DEVELOP.COM Subject: [ADVANCED-DOTNET] Grayscale images in WPF Hi, I've been using the Image control in the definition of a XAML UserControl, and I realized that when I set IsEnabled to false, then the bitmap displayed in the Image control doesn't get grayed out as I was expecting. I've been trying to create a similar control (or one that inherits from Image) that I could use from XAML and bind its properties. The idea is that I am binding the Source property of my image instance to a property of a data type that I have created (the property is actually a string of the location in the disk of the jpg file). So I need the new control to be able to be binded to. I tried using a FormatConvertedBitmap instance as the ImageSource of the Image.Source property, and giving it a BitmapImage instance, but I couldn't bind the BitmapImage to the path of the image on the disk. I also though on creating my own BitmapEffect, which would be a better solution, but these are very complicated to write since you need to meddle with some unmanaged code and COM interfaces, so I gave up this idea. Has someone succeded in doing something similar? I would like to end up with something like a control called GrayeableImage... TIA Uriel =================================== This list is hosted by DevelopMentor(r) http://www.develop.com View archives and manage your subscription(s) at http://discuss.develop.com =================================== This list is hosted by DevelopMentor(r) http://www.develop.com View archives and manage your subscription(s) at http://discuss.develop.com =================================== This list is hosted by DevelopMentor(r) http://www.develop.com View archives and manage your subscription(s) at http://discuss.develop.com =================================== This list is hosted by DevelopMentor® http://www.develop.com View archives and manage your subscription(s) at http://discuss.develop.com
