Abstract: In a method for providing a network service, a registration signal for waiting is received from a second client device through the network service server when a first client device is utilizing a network service provided by a network service server. Information about the second client device is registered on a waiting list through the network service server. A connection signal is received from a third client device through the network service server when the first client device is disconnected from the network service server. The connection signal from the third client device is utilized for the third client device to request the network service provided by the network service server. The network service is provided to the third client device through the network service server when the information about the third client device is on the waiting list. The present invention also discloses a network service server.

Abstract: A method for adjusting a contrast value of a video capturing end to a optimum contrast value is provided. Firstly, a first video image and a first contrast value of the first video image are gathered by a software part. A reference image is generated according to the first video image. The first video image is compared with the reference image to generate a first image evaluation value and an operation is performed to determine whether the first image evaluation value is greater than a first threshold. When the first image evaluation value is smaller than the first threshold, a second contrast value is generated according to the first contrast value and a dynamical contrast adjusting value. The second contrast value is sent to a firmware part by the software part to adjust a contrast value of the video capturing end according to the second contrast value.

Abstract: A method for adjusting a contrast value of a video capturing end to a optimum contrast value is provided. Firstly, a first video image and a first contrast value of the first video image are gathered by a software part. A reference image is generated according to the first video image. The first video image is compared with the reference image to generate a first image evaluation value and an operation is performed to determine whether the first image evaluation value is greater than a first threshold. When the first image evaluation value is smaller than the first threshold, a second contrast value is generated according to the first contrast value and a dynamical contrast adjusting value. The second contrast value is sent to a firmware part by the software part to adjust a contrast value of the video capturing end according to the second contrast value.