Rescale images for our webshops

Hello, We are searching for someone to rescale images for our webshops. We have 300 product images (isolated) that need to be resized to a square measurement. For every picture, two sizes have to be made: 1 masterpicture of the complete product of 500*500 px, and 1 detailpicture of 250*250 px with a relevant part of the productimage in detail/macro. The original pictures are in different sizes, not square, so they have to be rescaled to a square size mantaining the aspect ratio. Besides rescaling, the masterpicture must also be renamed, containing information about the size: ‘500’ and in case of the detailpicture, about the type: ‘detail', Masterpicture: Brand_productname_color_size_articlenumber Detailpicture: Brand_productname_color_detail There are some further specifications in choosing, for example the detailpicture, but the text as written above will be the basic frame to work in. We would like to start as soon as possible, thus all bids are welcome. An example of the masterpicture and an example of a detailpicture are attached to this project.