5 results about "Autofocus" patented technology

A method for providing an magnetic resonance imaging (MRI) with nonrigid motion correction of an object is provided. An MRI excitation is applied to the object. A magnetic field read out from the object using a plurality of sensor coils. Spatially localized motion estimates are obtained for each sensor coil of the plurality of sensor coils. The motion estimates are used for each sensor coil to provide motion correction.

The invention relates to the focusing technology and discloses a method for achieving manual adjustment of the focal distance in a smart mobile device. The method specifically comprises the first step that when a viewing frame picture appears on a screen, a detection module in the smart mobile device starts up to detect whether the screen is pressed by a user continuously or not, if yes, the second step is executed to conduct manual focusing, and if not, focusing is conducted according to the automatic focusing process; the second step that when a manual focusing control appears on the screen, a linear adjusting lever is arranged in the manual focusing control, wherein the manual focusing control is a square wireframe; the third step that after the manual focusing control appears, the manual focusing control flickers transiently, then the frame is fixed, and meanwhile light metering is completed once with the center of the square wireframe as the central point; the fourth step that after the frame is fixed, left-right sliding of a finger of the user on the screen is detected, and the linear adjusting lever slides in the sliding direction of the finger of the user; the fifth step that displacement of a camera is adjusted according to sliding of the linear adjusting lever, and therefore manual adjustment of the focal distance is achieved.

The invention provides an automatic focusing method of projection equipment, the projection equipment and a computer readable storage medium. The method comprises the steps that in the automatic focusing process, if the focal length changes, shooting a curtain projection image of projection equipment; Performing gray scale processing on the curtain projection image to obtain a gray scale image; Performing spatial domain filtering processing on the grayscale image; Performing time domain filtering processing on the gray level image after the spatial domain filtering processing; Calculating thesharpness value of the gray level image after the time domain filtering processing; Judging whether the sharpness value of the grayscale image reaches a preset maximum sharpness value or not; If yes,finishing automatic focusing; And if not, returning to the automatic focusing process, and if the focal length is changed, shooting a curtain projection image of the projection equipment to circularlyexecute the process. According to the invention, interference signals and noise points in a shot image can be removed, and the accuracy of automatic focusing effect judgment is improved, so that theprojection equipment can display a clear projection picture after automatic focusing.