我正在尝试为《城市:天际线》生成高度图,并将其导入为 16 位灰度 PNG。
我使用 PixelFormat.Format16bppGrayScale
创建了一个 Bitmap
,但尝试通过 Bitmap.Save
保存它,传入 ImageFormat .Png
,导致带有
ExternalException
"Additional information: A generic error occurred in GDI+."
此外,从这些 16 位灰度 PNG 文件之一加载位图
会将文件打开为 Format32bppArgb
,我假设会默默地丢弃一半数据。
如何在 .Net/C# 中处理 16 位灰度 PNG 图像?
最佳答案
更新: Magick.NET-Q16-AnyCPU 已移至 https://github.com/dlemstra/Magick.NET .
Magick.NET-Q16-AnyCPU 的 NuGet 包 https://magick.codeplex.com/工作完美。这是我的代码:
namespace heightmap_generator {
internal class Program {
private static int GRID_SIZE = 1081;
private static void Main(string[] args) {
using (MagickImage image = new MagickImage(@"C:\Users\Brent\AppData\Local\Colossal Order\Cities_Skylines\Addons\MapEditor\Heightmaps\benchmark.png")) {
image.Draw(
new DrawableFillColor(new MagickColor(ushort.MaxValue / 2, ushort.MaxValue / 2, ushort.MaxValue / 2)),
new DrawableRectangle(0, 0, GRID_SIZE, GRID_SIZE)
);
var drawables = new List<IDrawable>();
for (var y = 0; y < GRID_SIZE/50; ++y) {
float t = y / (GRID_SIZE / 50.0f);
t = t*t*(3 - 2*t); //cubic hermite spline h01
ushort v = (ushort)(ushort.MaxValue * (5 + (t-1)*0.3) / 10);
if (y == GRID_SIZE/50 - 1) {
v = (ushort) (ushort.MaxValue*0.501);
}
drawables.Add(new DrawableFillColor(new MagickColor(v, v, v)));
for (var x = 0; x < GRID_SIZE; ++x) {
if (x == GRID_SIZE/2) {
var v2 = (ushort) (v + ushort.MaxValue/1024);
drawables.Add(new DrawableFillColor(new MagickColor(v2, v2, v2)));
drawables.Add(new DrawableColor(x, GRID_SIZE/2 - y, PaintMethod.Point));
drawables.Add(new DrawableColor(x, GRID_SIZE/2 + y, PaintMethod.Point));
drawables.Add(new DrawableFillColor(new MagickColor(v, v, v)));
} else {
drawables.Add(new DrawableColor(x, GRID_SIZE/2 - y, PaintMethod.Point));
drawables.Add(new DrawableColor(x, GRID_SIZE/2 + y, PaintMethod.Point));
}
}
}
image.Draw(drawables);
image.Write(new FileStream(@"C:\Users\Brent\AppData\Local\Colossal Order\Cities_Skylines\Addons\MapEditor\Heightmaps\benchmark3.png", FileMode.Create));
}
}
}
}
关于c# - 如何在 C# 中创建 16 位灰度 PNG?,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/39865591/