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US 7,116,801 B2Granted
Image qualification for optical navigation sensor
AssigneePixArt Imagning Inc.
InventorChun-Huang Lin
Life of this patent
Estimating the term…
Abstract
An image qualification method. A movements-determining method utilizes the image qualification, the image qualification method of which requires only an image frame to determine if the image frame is qualified. Thus, the image qualification proceeds in real time. The image qualification counts peaks of images of the frame to determine if a number of the peaks exceed a certain number, depending on application.
Claims16
An anti-flicker method for determining the motion of a sensor, the method comprising:
- receiving a group of image frames;
- setting a number n equal to the number of image frames in the group which do not meet quality expectations;
- setting a number m equal to the number of image frames in the group which meet quality expectations;
- after the above steps, receiving a new image frame,
- classifying the new image frame as meeting quality expectations;
- determining that m+1>Nmax2, where Nmax2 is a pre-determined threshold, Nmax2 is the maximum number of frames which do not meet quality expectations;
- setting n=0;
- determining the motion of the sensor based on the new image frame.
5 more elements
An anti-flicker method for determining the motion of a sensor, the method comprising:
- receiving a group of image frames;
- setting a number n equal to the number of image frames in the group which do not meet quality expectations;
- setting a number m equal to the number of image frames in the group which meet quality expectations;
- after the above steps, receiving a new image frame;
- classifying the new image frame as not meeting quality expectations;
- determining that n+1<Nmax1, where Nmax1 is a pre-determined threshold, Nmax1 is the maximum number of frames which do not meet quality expectations;
- and
- determining the motion of the sensor based on either the group of image frames or the new image frame.
5 more elements
Dependencies are inferred from the claim text.