1. A method for developing a new-view image from an original image with a corresponding depth map, the original image having a plurality of original pixels, the new-view image having at least a new-view pixel, the method for developing the new-view image comprising: estimating a corresponding position of each original pixel corresponding the new-view pixel by an estimating unit according to a corresponding depth value of each original pixel; estimating an occupancy proportion of each original pixel occupying the new-view pixel by the estimating unit according to the corresponding position of each original pixel; initially obtaining an estimated color of an estimated partial pixel of the new-view pixel by an analyzing unit according to the occupancy proportion of one selected original pixel; and updating the estimated partial pixel by the analyzing unit according to the occupancy proportions of the other selected original pixels one by one.