Registers – Coded record sensors – Particular sensor structure
Patent
1996-03-29
1998-06-30
Evans, F. L.
Registers
Coded record sensors
Particular sensor structure
2502017, 235462, G06K 710
Patent
active
057738106
ABSTRACT:
A method for generating, substantially in real time, a user perceptible indication of the degree to which the distance between a handheld imaging device and a target object approximates the in-focus distance therebetween. A stored image of the target object is sampled, in accordance with a pattern of sampling addresses, to determine the magnitude of the slopes of the transitions of the stored image. The stored image is also sampled to determine the contrast value of the stored image. The highest magnitude slope values and the image contrast value are combined to produce a focus metric signal that is indicative of the degree to which the imaging device approximates an in-focus condition. The focus metric signal is then used to generate a user perceptible signal that can be utilized by an operator to move the imaging device toward its in-focus distance.
REFERENCES:
patent: 4578571 (1986-03-01), Williams
patent: 4818886 (1989-04-01), Drucker
patent: 4831275 (1989-05-01), Drucker
patent: 4877949 (1989-10-01), Daneilson et al.
patent: 4920255 (1990-04-01), Gabeler
patent: 5003165 (1991-03-01), Sarfati et al.
patent: 5420409 (1995-05-01), Longacre, Jr. et al.
Hussey Robert M.
Longacre Jr. Andrew
Evans F. L.
Welch Allyn Inc.
LandOfFree
Method for generating real time degree of focus signal for handh does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method for generating real time degree of focus signal for handh, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for generating real time degree of focus signal for handh will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1862309