| Value | Meaning |
|---|---|
| UndefinedResolution | No resolution has been specified. |
| PixelsPerInchResolution | Density specifications are specified in units of pixels per inch (English units). |
| PixelsPerCentimeterResolution | Density specifications are specified in units of pixels per centimeter (metric units). |
By default, ImageMagick defines resolutions in pixels per inch. ResolutionType provides a means to adjust this.