Релакс

<img src="image.png" height="450" width="300" id="picture">
<script>
$(document).ready(function() {
var width = $('#picture').width();
var height = $('#picture').height();
console.log('ширина = '+width+' высота = '+height);
});
</script>

$('img').removeAttr('width').removeAttr('height').width();

$width = imagesx ('/images/'.$path.'/'.$picture);
echo $width;

var img = document.querySelector('img');
console.log(img.naturalWidth);