Abstract: To provide an information handling system and a method of controlling the same which allows the state of the system to be saved without destructing other user data on an external storage device. When a predetermined event occurs, the system saves hibernation information in a hibernation information storing area on a hard disk. A hibernation managing information storing area is provided in the outermost cylinder of the hard disk. A boot sector already exists in the outermost cylinder. Therefore, the hibernation managing information is written in the outermost cylinder after the boot sector has been sheltered to the hibernation information storing area. After such series of processes have been completed, the system shifts to a hibernation mode. On the other hand, when power feeding to the system is resumed, the hibernation information is read out to check whether or not the system was in the hibernation mode, etc.

Abstract: A method for transmitting a halftone image using the dither method is provided. In accordance with the present invention, an original image to be transmitted is divided into a plurality of regions corresponding in pattern and shape to the dither matrix used. And, each of the regions thus divided is further subdivided into a plurality of subregions of predetermined shape and then the average value of density for each of the regions is calculated. This average value is then compared with each of the thresholds of the corresponding group in the dither matrix to determine the location of a maximum threshold among those thresholds which are equal to or less than (or less than) the average value to determine an address for each of the regions. Then, such a string of addresses is subjected to a predetermined coding for compression of data to be transmitted. Upon receipt of such data, the process described above is basically reversed to reconstruct a dither-processed halftone image.