make white background for 100 images batch -regular work with time line

we have images for which we need to use them for flipkart, snapdeal and other sites with white background... clarity of images is a must and it is a regular work with time bound work...3 days from the date of sending of images each time have attached the sample showing what type of work is needed to be done .... one image is in white background but still not correct as it has some background stairs showing... we will only be able to transfer files by we transfer and the images file name have to be retained as it it.. if there is some issue please do let me know