a6e5b969-be6e-4756-ae53-47d3cb899ca4.png

6983ae69-67a7-47b8-bb71-1114b36a85cd.jpg

Senior Software Engineer

a261fe0e-84df-42c0-bdab-8e9630e71c5d.nupkg

**What**

Activities that output an image file can have their results checked using an image comparison algorithm. The simplest of these is a pixel-by-pixel check for equality. More complex algorithms that take an error metric based threshold parameter can also be used. The latter are implemented using the [Magick.NET](https://github.com/dlemstra/Magick.NET) library's _**Compare**_ method.

  

**Who**

RPA developers, although QAs can also use it to run image specific scenarios.

  

**How**

Drag and drop the **Compare Two Image Files Pixel By Pixel** activity from under the _**UIPathTeam &gt;**_ _**Images**_ node. Locate the two image files to be used in the comparison.

The activity returns a boolean that indicates whether or not the two inputted files are identical.

  

Drag and drop the **Compare Two Image Files Using Threshold** activity from under the _**UIPathTeam &gt; Images**_ node. Locate the two image files to be used in the comparison. Choose one of the available **ErrorMetric** values. An explanation regarding metrics can be found [here](http://www.imagemagick.org/Usage/compare/#statistics). Set the required **Threshold** value. This represents the upper bound of the distortion based on the selected **ErrorMetric** for the two input images to be considered equal. The activity returns returns the computed **Distortion.** It also returns a boolean that indicates whether or not the two inputted files are equal based on the computed distortion and the **Threshold** value.

  

The supported image file types are:

*   PNG
*   JPEG
*   BMP
*   GIF
*   TIFF

A package containing activities for comparing image files

7300759f-02d8-436f-bc69-8b548a5b4d95.png

6015ba38-866e-4be7-822e-1aa7dc34d269.png

17a9f0a7-f93a-46d7-92cb-b63d6488d354.zip

4404c09f-08f1-4b32-a999-ae7937b6c3a5.nupkg

afdba9ab-c5cd-4762-8281-80b68eb1debc.zip

36122528-47e9-4ff2-8741-fcb870cc57e7.nupkg

ea60f2f0-8803-4c24-93b1-9db25ebbc4cb.zip

fff0ac00-ce69-48cb-aa22-21a60ca898f0.nupkg

b247f063-8c18-4e28-b779-d58ea3dd7f95.zip

Image Activities - Image Comparison