Method for determining power-save mode of multimedia application

A method for determining a power-save mode of multimedia application, taking an image data retrieved by an image sensor as a determining reference for controlling a computer system to enter a power-save mode from a normal mode, comprising:

• retrieving a first image data corresponding to a plurality of a user's facial features including a first eigenvector of eyes, a first eigenvector of nose and a first eigenvector of mouth by the image sensor, when the user operates the computer system through a peripheral input device;
• storing the first image data to the computer system;
• confirming whether an input signal from the peripheral input device is received or not within a preset time by the computer system;
• retrieving a second image data including a second eigenvector of eyes, a second eigenvector of nose and a second eigenvector of mouth through the image sensor once the preset time is reached and the computer system does not receive the input signal from the peripheral input device;
• comparing the second eigenvector of eyes, the second eigenvector of nose and the second eigenvector of mouth in the second image data with the first eigenvector of eyes, the first eigenvector of nose and the first eigenvector of mouth in the first image data by the computer system;
• the computer system entering the power-save mode, if a matching rate between the second eigenvector of eyes, the second eigenvector of nose and the second eigenvector of mouth in the second image data and the first eigenvector of eyes, the first eigenvector of nose and the first eigenvector of mouth in the first image data falls out of a specific range;
• retrieving a third image data including a third eigenvector of eyes, a third eigenvector of nose and a third eigenvector of mouth by the image sensor, when the computer system which is in the power-save mode confirms that the input signal is received;
• comparing the third eigenvector of eyes, the third eigenvector of nose and the third eigenvector of mouth in the third image data with the first eigenvector of eyes, the first eigenvector of nose and the first eigenvector of mouth in the first image data by the computer system;
• and
• the computer system entering the normal mode from the power-save mode, if a matching rate between the third eigenvector of eyes, the third eigenvector of nose and the third eigenvector of mouth in the third image data and the first eigenvector of eyes, the first eigenvector of nose and the first eigenvector of mouth in the first image data falls within the specific range.