Random image size

[creation-handicap]

Hello!

Is there a way to display images in random size in PS 1.7.x?

I'm building a masonry gallery on my frontpage with http://miromannino.github.io/Justified-Gallery/

When I set up a new image I have to put in the height and the width. Is there a possibility that I only write the height of an image and then the width is calculated accordingly?

[creation-handicap]

Update: We just took the original images as workaround.

We also took this module to achieve this:
https://addons.prestashop.com/en/products-homepage/17183-home-categories.html

In the template modules/homecategories/views/templates/hook/homecategories.tpl of this "Home Categories Module" I've put in this code for showing the original image:

<img src="{$img_cat_dir|escape:'htmlall':'UTF-8'}{$category.id_category|intval}.jpg" alt="{$category.name|escape:'htmlall':'UTF-8'}" title="{$category.name|escape:'htmlall':'UTF-8'}" class="categoryImage" />