accurcy in align

[ahmed KIMOO]

hello,
what mean accuracy (highest, high, ......) in align step
what mathematically depend on?
thanks,

[Alexey Pasumansky]

Hello ahmed KIMOO,

Please refer to the User Manual:

Higher accuracy settings help to obtain more accurate camera position estimates. Lower accuracy
settings can be used to get the rough camera positions in a shorter period of time.

While at High accuracy setting the software works with the photos of the original size, Medium setting
causes image downscaling by factor of 4 (2 times by each side), at Low accuracy source files are
downscaled by factor of 16, and Lowest value means further downscaling by 4 times more. Highest
accuracy setting upscales the image by factor of 4. Since tie point positions are estimated on the
basis of feature spots found on the source images, it may be meaningful to upscale a source photo
to accurately localize a tie point. However, Highest accuracy setting is recommended only for very
sharp image data and mostly for research purposes due to the corresponding processing being quite
time consuming

[ahmed KIMOO]

thanks,