Abstract: A photographing apparatus includes a storage device for storing a silhouette image; an image sensor for capturing a first image of an object, the first image including a first object image and a first background image; a comparison module for comparing the first object image with respect to the silhouette image to obtaining a base difference; and a correction module for correcting position of the first object image with respect to the first image to obtain a second image of the object according to the base difference. The second image includes a second object image incorporating with the silhouette image to define a first difference that is smaller than a predetermined value.

Abstract: A method and related apparatus for inputting characters. The number of buttons of a portable electric device is smaller than the number of buttons of a keyboard of a computer. Therefore, it takes more time and is more inconvenient to key in characters into the portable electric device. While inputting characters in the portable electric device, two or more adjacent buttons are simultaneously pressed, such that the number of pressing buttons can be reduced.

Abstract: A photographing apparatus includes a storage device for storing a silhouette image; an image sensor for capturing a first image of an object, the first image including a first object image and a first background image; a comparison module for comparing the first object image with respect to the silhouette image to obtaining a base difference; and a correction module for correcting position of the first object image with respect to the first image to obtain a second image of the object according to the base difference. The second image includes a second object image incorporating with the silhouette image to define a first difference that is smaller than a predetermined value.

Abstract: A power source test instrument for a circuit includes a voltage test circuit and a current test circuit. Two operational amplifiers form the voltage test circuit and the current test circuit. The power source test instrument is convenient and saves time when conducing various kinds of tests including: charging, discharging, dummy battery loading, and current testing. Additionally the power source test instrument ensures a full test without damaging or requiring disassembly of the product under test.

Abstract: A method of processing sound signals in a communication device is disclosed. The communication device comprises a sound receiving unit, a storage unit, an processing unit, and a transceiving unit, the method comprises;(a) receiving a first sound signal by using the sound receiving unit; (b) processing the first sound signal and a second sound signal stored in the storage unit by using the processing unit; and (c) sending the processed first sound signal and the processed second sound signal to the transceiving unit, so that a listener is capable of simultaneously listening to the processed first sound signal and the processed second sound signal.

Abstract: A power source test instrument for a circuit includes a voltage test circuit and a current test circuit. Two operational amplifiers form the voltage test circuit and the current test circuit. The power source test instrument is convenient and saves time when conducing various kinds of tests including: charging, discharging, dummy battery loading, and current testing. Additionally the power source test instrument ensures a full test without damaging or requiring disassembly of the product under test.