Customized function to generates ACF costomized image display.

acf_image_function.php

<?php
/**
* Custom function for ACF to display an customized image field.
* 
*/

function tabs_image($img){

    $image = get_sub_field($img); //replace get_sub_field by get_field if not subfield

    if( !empty($image) ):

        // vars
        $url = $image['url'];
        $title = $image['title'];
        $alt = $image['alt'];
        $caption = $image['caption'];

        // thumbnail
        $size = 'tabs-thumb';
        $thumb = $image['sizes'][ $size ];
        $width = $image['sizes'][ $size . '-width' ];
        $height = $image['sizes'][ $size . '-height' ];

        if( $caption ):

            echo '<div class="wp-caption">';

        endif;
        
//Uncomment to create link to image
//        echo '<a href="' . $url . '" title="' . $title . '">'; 


        echo '<img src="' . $thumb . '" alt="' . $alt . '" width="' . $width . '" height="' . $height . '" />';

//        echo '</a>';
//Uncomment to create link to image

        if( $caption ):

            echo '<p class="wp-caption-text">' . $caption . '</p>';

            echo '</div>';

        endif;
    endif;
}
?>


<?php
/**
* USAGE: 
* Simply compy pase this in your code by replacing the 'your_image_field_name' parameter
*/
echo tabs_image('your_image_field_name'); ?>