Abstract: A method is provided for determining the actual amplitude of a signal relative to a predetermined amplitude. According to the method, two samples of the signal are squared to produce two squared samples, and the sum of the two squared samples minus the square of the predetermined amplitude is calculated to produce a difference of squares. A shift operation is performed on the difference of squares to determine a difference between the actual amplitude and the predetermined amplitude. In a preferred embodiment, two consecutive samples of the signal are taken at four times the frequency of the signal. Also provided is a circuit device that includes an A/D converter, a variable gain amplifier, and a feedback loop. The A/D converter converts an analog signal into a digital signal, and the variable gain amplifier adjusts the amplitude of the analog signal. The feedback loop controls the variable gain amplifier based on a difference between the amplitude of the analog signal and a predetermined amplitude.

Abstract: A method in digital stereo camera for creating anaglyphs of a given subject with a pre-set stereoscopic distance (Sd). The camera has a pre-set distance (D) between and an scene plane and a lens plane defined by pair of first and second lenses aligned along a plane. The camera includes a pre-set distance (p) between the lens plane and an image plane. The pair of lenses is coupled to a pair of imagers. The method comprising the steps of: producing a pair of stereo images each having three color channels; cropping each of the pair of images by an amount (b), where b=Sd*(p/D); and combining one color channel from one of the pair of stereo images with two color channels from a second of the pair of stereo images, so that the resulting image comprises three orthogonal color channels. In another embodiment, a digital stereoscopic camera and a computer readable medium for carrying out the above method is described.

Abstract: A method for estimating the motion between a first image and a second image in a system for creating a panoramic image from a plurality of images taken by a camera, the method comprising the steps of: downsampling a first image in a first direction and in a second direction; downsampling a second image in a first direction and in a second direction; filtering the first and the second image so as to filter out any global illumination changes between the first image and the second image; calculating a first displacement along the first direction between the first downsampled image along the first direction and the second downsampled image along the first direction; and calculating a second displacement along the second direction between the first downsampled image along the second direction and the second downsampled image along the second direction. In an alternate embodiment, a device and computer readable medium corresponding to the above method is described.