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Senior Software Engineer

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**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

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

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

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

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

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

Version	Release Date	Download Link
2.1.0	April 27, 2020
1. Initial release (1.0.0) 2. Second release (2.0.0) contains: output parameter rename (breaking change) redesigned & fixed user interface 3. Third release (2.1.0) contains: user interface fixes related to box heights
2.0.0	April 21, 2020
1. Initial release 2. Second release contains: output parameter rename (breaking change) redesigned & fixed user interface
1.0.0	April 10, 2019
Initial release
1.0.0	April 12, 2019
Initial release

Image Activities - Image Comparison