%BFT_SUM_IMAGES Sum 2 low resolution images in 1 high resolution.%%USAGE  : [hi_res] = bft_sum_images(image1, ele1, image2, ele2, time)%%INPUT  : image1 - Matrix with the RF data for the image. The number%                  of columns corresponds to the number of lines%         ele1   - Number of emitting element used to obtain the image. %         image2 - Matrix with the RF data for the image. The number%                  of columns corresponding to the number of lines%         ele2   - Number of emitting element used to obtain the image.%         time   -  The arrival time of the first samples. The two images%                   must be aligned in time%%OUTPUT : hi_res - Higher resolution image%%VERSION:1.0 Feb.18 2000, Svetoslav Nikolovfunction [hi_res] = bft_sum_images(image1, ele1, image2, ele2, time)[hi_res] = bft(12, image1, ele1, image2, ele2, time);