Modify the images contrast and brightness values.

Modify given file contrast by 100 and brightness by 100


The Contrast/Brightness Block is used for modifying an JPEG or PNG  images contrast or brightness. A value of 100 results in an unmodified property. A lower value will reduce the contrast/brightness. A higher value will result in more contrast/a brighter image.

Use cases

  • Modifying the contrast/brightness of user generated (e.g. signature) or downloaded (probably dynamically generated) images.


Clicking on given file in the title of the building block lets you pick the desired image from your Google Drive.

You can deselect the picked image by clicking on the x button on the right of the selected filename.

If no image has been picked, Ultradox will load the given image that is stored in the input variable.

Clicking on one the 100 lets you pick the corresponding new value. The values are relative.

Questions and Feedback

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Last Updated: 10/1/18