In order to solve the transmission question for the infrared images through the low bandwidth data link,a new image segmentation method based on transition region was proposed for ROI automatically detected.Finally,ROI of image compression based on symbol flag lifting SPIHT algorithm was discussed.An experimental study was also conducted after the compression scheme realized on the basic frame of JPEG2000.It is proved that the method of image compression based on region of interest automatic detected was reliable effective,and significant in applications.