For retinal fundus images, the montaging options are quite simple. Unlike other modalities, there are no layout options because the layout is dictated by the geometry of the retinal surface and by the optics of fundus cameras. The masking process is applied automatically to retinal images. Users who are working with different types of retinal images other than color, red-free and fluoresceins are encouraged to try "Other Modalities".
Blend Options
Three options are offered for blending the intensities of retinal images in forming the montage:
- Full blending implies that i2k Retina's illumination correction and seam selection algorithms, specialized to retinal images, will be applied to the aligned images prior to forming the montage. This gives the cleanest and most seamless result. It also takes the most time since the intensities must be carefully analyzed by the software prior to forming the final montage.
- Feathered blending combines the intensities in a smoothly weighted averaging process, produces a gradual transition between images without correcting for illumination artifacts.
- Choosing "None" implies that the images are combined with a simple averaging process, leaving most seams between images.
Aggressive Registration
Clicking this button tells i2k Retina to be more aggressive than usual in trying to align each pair of images. This allows it to handle tougher cases while taking a bit more computation time. On rare occasions this leads i2k Retina to make mistakes, so this should be used only when ordinary registration fails and when the user is certain the images should be aligned.
