OPHTHALMIC REFERENCE IMAGE SELECTION

摘要

A method for selecting a representative image of an eye from a plurality of captured images, comprises associating neighbouring images from the plurality of images with each other to determine a spatial relationship (shift) of the images and an initial quality value for each image. The method determines an accumulated quality value for at least one portion of each image using the initial quality values corresponding to those other images of the plurality of images that are spatially related with the portion. The spatial relationship between a portion of an image and the other images is identified based of the determined spatial arrangement of the images. The method selects a representative image from the plurality of images using, for each image, at least the initial quality value for the image and the accumulated quality value of at least one portion of the image.

主权项

1. A method for selecting a representative image of an eye from a sequence of captured images, the method comprising:
forming at least first and second chains of connected images from the sequence of captured images by associating neighbouring images of the sequence with each other, wherein at least two chains are formed in response to failing to associate at least one pair of neighbouring images, the images in each chain are connected using a relative spatial relationship between the images in the chain; establishing a spatial relationship between the first and second chains by joining the first and the second chains to form a joined chain, the joining being performed by determining a quality value between a first and a second anchor images, the anchor images being determined using initial quality values for images in the corresponding chain; determining an accumulated quality value for at least one portion of each image in the joined chain using the initial quality values for images overlapping said portion, wherein an overlapping between a portion of an image and other images being identified based of the established spatial relationship between the chains and the relative spatial relationship between the images in each chain; and selecting a representative image from the joint chain using at least the initial quality value for the image and the determined accumulated quality value for at least one portion of the image.