1. A method for image stitching, comprising: transforming at least one candidate strip in a first image into at least one transformed strip by mathematical transformation, wherein spatial pixel information within the candidate strip is transformed into frequency domain expression including frequency coefficients with co-existing physical location information including indexes of transform coefficient; calculating featureness of the candidate strip of the image based on energies of transformed regions of the transformed strip, wherein the featureness is a degree of image detail, and describes a high frequency ratio; calculating a candidate feature point of the candidate strip based on a maximum of high frequency coefficients and the corresponding index of transform coefficient; determining a position of a matching block based on the candidate feature point; comparing the matching block with at least one search block in a search area in a second image to calculate correlation coefficients between the matching block and the searching blocks, wherein the correlation coefficient determines similarity between the matching block and the searching block; determining a maximum correlation coefficient, which is a maximum from the correlation coefficients; calculating an offset value from the matching block based on a correlation maximum location, where the searching block is in maximum correlation with the matching block; calculating a strip-offset between the first and second images based on the offset value; and repeating the above steps for remaining images.