John : Unfortunatley no.. simply adjusting the hue is only going to acheive a degredation of the entire image. Everything else is fine, the problem is how the image being taken is being transcoded.
The data initally is there in the original photo - Its simple to just slightly filter the CYMK colour level.
Thats why when I did it, the grass has remained the same - not looking like a faded purple photo.