Global MTF measurement system
AssigneeNeuromedical Systems, Inc.
InventorEran Kaplan
Life of this patent
Estimating the term…
Abstract
The MTF for an optical or electronic device(s) is evaluated over a substantial portion of an image signal. As a result, a composite MTF representing a more global evaluation is achieved. Furthermore, the MTF for all or part of a system can be evaluated in situ.
Claims21
In a system having one or more optical or electronic elements for obtaining an image of an object, means for obtaining a modulation transfer function comprising:
- means for imaging the object in an image frame based on the elements;
- means for determining a modulation transfer function with respect to each of a plurality of locations within the image frame, the plurality of locations being substantially distributed within the image frame;
- and
- means for processing the modulation transfer functions obtained with respect to the plurality of locations to obtain a composite modulation transfer function for at least part of the system.
In a system having one or more optical or electronic elements for obtaining an image of an object, a method for obtaining a modulation transfer function comprising:
- imaging the object in an image frame via the elements;
- determining a modulation transfer function with respect to each of a plurality of locations within the image frame, the plurality of locations being substantially distributed within the image frame;
- and
- processing the modulation transfer functions obtained with respect to the plurality of locations to obtain a composite modulation transfer function for at least part of the system.
In a system having a plurality of optical or electronic elements cascaded together for obtaining an image of an object, means for obtaining a modulation transfer function comprising:
- means for imaging the object in an image frame based on the elements;
- and
- means for determining a modulation transfer function for at least part of the elements in situ based on the image frame.
Dependencies are inferred from the claim text.