Based on (AdaptiveResize)[https://github.com/obukhow/AdaptiveResize] for Magento 1

Examples:

1. $this->helper('Trive\AdaptiveResize\Helper\Image')->init($_product)->adaptiveResize(240,300);
2. $this->helper('Trive\AdaptiveResize\Helper\Image')->init($_product,'category_page_grid')->adaptiveResize(240,300);
3. $this->helper('Trive\AdaptiveResize\Helper\Image')->init($_product,'category_page_grid')->setCropPosition('top')->adaptiveResize(240);

You can use following parameters with setCropPosition function:

• top
• top-left
• top-right
• bottom
• bottom-left
• bottom-right
• center
• center-left
• center-right