US 12,411,058 B2
Method and apparatus for aligning lens assembly of camera
Nandagopalan V, Chennai (IN); and Pavithra S, Chennai (IN)
Assigned to E-CON SYSTEMS INDIA PRIVATE LIMITED., Chennai (IN)
Filed by E-CON SYSTEMS INDIA PRIVATE LIMITED., Chennai (IN)
Filed on Mar. 3, 2023, as Appl. No. 18/178,011.
Prior Publication US 2024/0295462 A1, Sep. 5, 2024
Int. Cl. G01M 11/02 (2006.01)
CPC G01M 11/0264 (2013.01) [G01M 11/0292 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A method for aligning a lens assembly of a camera, the method comprising:
obtaining, by an image processor, at least one image frame being captured by the camera;
determining, by the image processor, at least one slant edge spread over at least one region of the at least one image frame by analyzing each image frame, wherein the at least one slant edge defines a contrast of the at least one image frame and the at least one region being comprising at least one template or at least one contour of a test chart;
estimating, by the image processor, contrast variations in the at least one slant edge spread over the at least one region of the at least one image frame using Modulation Transfer Function (MTF), wherein the contrast variations in the at least one slant edge identify a black and white transition in the at least one image frame; and
aligning, by the image processor, the lens assembly of the camera in accordance with the estimated contrast variations in the at least one slant edge spread over the at least one region of the at least one image frame.