VerticalResolution
BmpImage.VerticalResolution property
获取或设置此对象的垂直分辨率,以每英寸像素为单位RasterImage
.
public override double VerticalResolution { get; set; }
适当的价值
垂直分辨率。
评论
请注意,默认情况下,此值始终为 96,因为不同的平台无法返回屏幕分辨率。您可以考虑使用 SetResolution 方法在一次调用中更新两个分辨率值。
例子
以下示例显示如何设置 BMP 图像的水平/垂直分辨率。
[C#]
string dir = "c:\\temp\\";
using (Aspose.Imaging.Image image = Aspose.Imaging.Image.Load(dir + "sample.bmp"))
{
Aspose.Imaging.FileFormats.Bmp.BmpImage bmpImage = (Aspose.Imaging.FileFormats.Bmp.BmpImage)image;
// 获取 BmpImage 的水平和垂直分辨率
double horizontalResolution = bmpImage.HorizontalResolution;
double verticalResolution = bmpImage.VerticalResolution;
System.Console.WriteLine("The horizontal resolution, in pixels per inch: {0}", horizontalResolution);
System.Console.WriteLine("The vertical resolution, in pixels per inch: {0}", verticalResolution);
if (horizontalResolution != 96.0 || verticalResolution != 96.0)
{
// 使用 SetResolution 方法在一次调用中更新两个分辨率值。
System.Console.WriteLine("Set resolution values to 96 dpi");
bmpImage.SetResolution(96.0, 96.0);
System.Console.WriteLine("The horizontal resolution, in pixels per inch: {0}", bmpImage.HorizontalResolution);
System.Console.WriteLine("The vertical resolution, in pixels per inch: {0}", bmpImage.VerticalResolution);
}
// 输出可能如下所示:
// 水平分辨率,以每英寸像素为单位:0
// 垂直分辨率,以每英寸像素为单位:0
// 将分辨率值设置为 96 dpi
// 水平分辨率,以每英寸像素为单位:96.012
// 垂直分辨率,以每英寸像素为单位:96.012
}
以下示例获取有关图像的一般信息,包括像素格式、图像大小、分辨率、压缩等。
[C#]
using (Aspose.Imaging.Image image = Aspose.Imaging.Image.Load(@"c:\temp\sample.bmp"))
{
Aspose.Imaging.FileFormats.Bmp.BmpImage bmpImage = (Aspose.Imaging.FileFormats.Bmp.BmpImage)image;
System.Console.WriteLine("The pixel format: {0}", bmpImage.RawDataFormat);
System.Console.WriteLine("The raw line size in bytes: {0}", bmpImage.RawLineSize);
System.Console.WriteLine("The bitmap compression: {0}", bmpImage.Compression);
System.Console.WriteLine("The bitmap width: {0}", bmpImage.Width);
System.Console.WriteLine("The bitmap height: {0}", bmpImage.Height);
System.Console.WriteLine("The number of bits per pixel: {0}", bmpImage.BitsPerPixel);
double hres = bmpImage.HorizontalResolution;
double vres = bmpImage.VerticalResolution;
System.Console.WriteLine("The horizontal resolution, in pixels per inch: {0}", hres);
System.Console.WriteLine("The vertical resolution, in pixels per inch: {0}", vres);
if (hres != 96.0 || vres != 96.0)
{
// 您可以考虑使用 SetResolution 方法在一次调用中更新两个分辨率值。
System.Console.WriteLine("Set resolution values to 96 dpi");
bmpImage.SetResolution(96.0, 96.0);
System.Console.WriteLine("The horizontal resolution, in pixels per inch: {0}", bmpImage.HorizontalResolution);
System.Console.WriteLine("The vertical resolution, in pixels per inch: {0}", bmpImage.VerticalResolution);
}
//输出可能如下所示:
//像素格式:RGB24Bpp,使用通道:8,8,8
//原始行大小(以字节为单位):1500
//位图压缩:RGB
//位图宽度:500
//位图高度:375
//每个像素的位数:24
//水平分辨率,以每英寸像素为单位:0
//垂直分辨率,以每英寸像素为单位:0
//将分辨率值设置为96 dpi
//水平分辨率,以每英寸像素为单位:96.012
//垂直分辨率,以每英寸像素为单位:96.012
}
也可以看看
- class BmpImage
- 命名空间 Aspose.Imaging.FileFormats.Bmp
- 部件 Aspose.Imaging