As far as I know, WPF always does anti-aliasing when scaling a bitmap. However you should be able to accomplish your goal by avoiding the bitmap scaling.
There are two steps:
Set SnapsToDevicePixels="true" on your image
Set a ScaleTransform on your image to scale it so that one device pixel = one bitmap pixel
To compute the needed ScaleTransform, compute your screen's DPI like this:
var DPI = Win32Functions.GetSystemMetrics(SM_CYICON) / SystemParameters.IconHeight * 96;
and then for the bitmap, do:
var scale = bitmapDPI / DPI;
var transform = new ScaleTransform(scale, scale);
This will cause your bitmap's pixels to exactly match with the device pixels. WPF will not stretch the bitmap, so there should be no anti-aliasing.
If you do want to stretch your image on high DPI screens but do so without anti-aliasing (eg double all pixels), just stretch the bitmap in your own code using whichever algorithm you like and use the above with the stretched bitmap.
It's not really anti-aliasing - it's sub pixel positioning that causing the problem, I've written about it (and about a control that solves the problem) on my blog at:
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据我所知，WPF 在缩放位图时总是会进行抗锯齿处理。但是，您应该能够通过避免位图缩放来实现您的目标。
有两个步骤：
要计算所需的 ScaleTransform，请计算屏幕的 DPI，如下所示this：
然后对于位图，执行：
这将使位图的像素与设备像素完全匹配。 WPF 不会拉伸位图，因此不应该有抗锯齿。
如果您确实想在高 DPI 屏幕上拉伸图像，但不使用抗锯齿功能（例如，将所有像素加倍），只需使用您喜欢的算法在您自己的代码中拉伸位图，并将上述内容与拉伸的位图一起使用。
As far as I know, WPF always does anti-aliasing when scaling a bitmap. However you should be able to accomplish your goal by avoiding the bitmap scaling.
There are two steps:
SnapsToDevicePixels="true"on your imageTo compute the needed ScaleTransform, compute your screen's DPI like this:
and then for the bitmap, do:
This will cause your bitmap's pixels to exactly match with the device pixels. WPF will not stretch the bitmap, so there should be no anti-aliasing.
If you do want to stretch your image on high DPI screens but do so without anti-aliasing (eg double all pixels), just stretch the bitmap in your own code using whichever algorithm you like and use the above with the stretched bitmap.
它并不是真正的抗锯齿 - 导致问题的是子像素定位，我在我的博客上写了相关内容（以及解决问题的控件）：
http://www.nbdtech.com/blog/archive/2008/11/20/blurred -wpf.aspx 中的图像
It's not really anti-aliasing - it's sub pixel positioning that causing the problem, I've written about it (and about a control that solves the problem) on my blog at:
http://www.nbdtech.com/blog/archive/2008/11/20/blurred-images-in-wpf.aspx