# How to properly configure the two image comparison (diff) function in node/node-red-contrib-image-tools?

**URL:** <https://discourse.nodered.org/t/how-to-properly-configure-the-two-image-comparison-diff-function-in-node-node-red-contrib-image-tools/95063>\
**Category:** General\
**Created:** [2 February 2025 08:52 UTC](https://discourse.nodered.org/t/how-to-properly-configure-the-two-image-comparison-diff-function-in-node-node-red-contrib-image-tools/95063 "2025-02-02T08:52:58Z")\
**Posts on this page:** 1\
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**Author:** ![Steve-Mcl](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/steve-mcl/32/4826_2.png) [@Steve-Mcl](https://discourse.nodered.org/u/Steve-Mcl)\
**Post date:** [2 February 2025 09:25 UTC](https://discourse.nodered.org/t/how-to-properly-configure-the-two-image-comparison-diff-function-in-node-node-red-contrib-image-tools/95063/2 "2025-02-02T09:25:47Z")

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I can't remember if I added a diff option to image-tools but I did do a demo for someone: [Compare to images , get simularity in percentage - #11 by Steve-Mcl](https://discourse.nodered.org/t/compare-to-images-get-simularity-in-percentage/87805/11)

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