Magento Addon. Customizable Product From Customer

This Project involves around the creation of an addon feature for a Magento Website. This includes a “create your own product?? feature for the customer. The eshop sells wallpapers for house walls and the customer will have to be able to upload an image and set a height width parameter in order to create his own wallpaper. The application required is exactly what can be found under the following website: [login to view URL] The website is provided only in Greek but an understanding of the requirements and specifications can be acquired in detailed. As it can be seen in the second step a number of mathematical calculations are performed including locked aspect ratios etc from where the user can also select which specific part of the scaled/cropped image to be applied to his wallpaper. A preview of the result will be included next to it in order to be able to view the outcome which will change real time according to the modifications. Finally the price should be calculated according to width and height inserted previously and a method of providing discounts according to the dimensions should exists. The outcome will then need to be sent to the checkout from where the customer can purchase it. Specifications will be discussed in more detail after assignment of the project has been performed. Any suggestions regarding the modification are welcome.