LIBMAS/Base/MeasurementUnit.cs

namespace PaintDotNet
{
    /// <summary>
    /// 度量单位的枚举
    /// </summary>
    /// <remarks>
    /// These enumeration values correspond to the values used in the EXIF ResolutionUnit tag.
    /// </remarks>
    public enum MeasurementUnit : int
    {
        /// <summary>
        /// 英寸
        /// </summary>
        Inch = 1,
        /// <summary>
        /// 厘米
        /// </summary>
        Centimeter = 2,
        /// <summary>
        /// 毫米
        /// </summary>
        Millimeter = 3,
        /// <summary>
        /// 微米
        /// </summary>
        Micron = 4,
        /// <summary>
        /// 纳米
        /// </summary>
        Nano = 5,
        /// <summary>
        /// 像素
        /// </summary>
        Pixel = 6,
        /// <summary>
        /// 密耳（mil），是1mil=1/1000inch=0.0254mm 1inch=1000mil=25.4mm  1mm=39.37mil 
        /// </summary>
        Mil = 7
    }
}