1. A computer-implemented method for transforming feature regions included in a sequence of images, the method comprising: receiving a first sequence of images having a first image format; receiving input specifying a second image format; determining feature regions of the first sequence of images; computing a warp of the first sequence of images from the first image format to the second image format, by optimizing an energy equation having an energy term, wherein at least one feature region of the first sequence of images is transformed based on an affine transformation, wherein the affine transformation comprises a scaling operation based on a predefined scaling factor, wherein the energy term comprises one of a first energy term measuring uniformity of scaling of feature regions and a second energy term measuring bending and blurring of specified edges; and generating a second sequence of images having the second image format, wherein the second sequence of images includes the at least one feature region transformed based on the affine transformation, wherein at least one non-feature region included in the first sequence of images is transformed using the computed warp.