Digital cameras and methods that help a user accurately align sequential photographs to create large panoramas and composite photographs derived from a sequence of smaller photographs. The tie layer is made up of the reaction product of a live, grafted polyolefin and an olefin elastomer. The halftone pixels are suitable for containing halftone dots. Also, even if it takes longer time for increasing the pressure within the hydrogen tank at the initial filling state, the delayed time can be caught up and, the apparatus and the process of the present invention can totally attain a rapidly filling with hydrogen. The legs of the clip are trapped between a flange formed at the outer distal end of the male member that extends through and beyond the female component. By the invention, the requirements of a user for the richness and diversity of screen locked interface is satisfied, the availability and friendliness of the mobile terminal device in terms of the screen locked interface is improved and the user experience is improved.