GMImage.Signature
-----------------

Image signature. Set force to 1 in order to re-calculate the signature regardless of whether the image data has been modified.

| Component | Version | macOS | Windows | Linux | Server | iOS SDK |
|---|---|---|---|---|---|---|
| [GraphicsMagick](component_GraphicsMagick.md) | [2.0](newinversion20.md) | ✅ Yes | ✅ Yes | ✅ Yes | ✅ Yes | ✅ Yes |

MBS( "GMImage.Signature"; ImageRef { ; Force } ) 

**MBS**( **"GMImage.Signature";** /\* Image signature. Set force to 1 in order to re-calculate the signature regardless of whether the image data has been modified. \*/  
**$ImageRef**; /\* The image reference number.e.g. 1 \*/   
**$Force**) /\* Optional; Optional, a boolean value.e.g. 0 \*/ 

### Parameters

| Parameter | Description | Example | Flags |
|---|---|---|---|
| ImageRef | The image reference number. | 1 |  |
| Force | Optional, a boolean value. | 0 | Optional |

### Result

Returns the signature string.

### Description

Image signature. Set force to 1 in order to re-calculate the signature regardless of whether the image data has been modified.  
This function checks for a license.

Created 18th August 2014 , last changed 18th August 2014

  
[GMImage.Shear](GMImageShear.md) - [GMImage.SkewX](GMImageSkewX.md)

[HTML Version](GMImageSignature.shtml)