Is it possible to reduce the spatial resolution of an image without using imresize?

I have an image 3692x2812 pixels and 1250 dpi. I have to successively simulate reducing the spatial resolution by a factor of 2, 4, 8, 16 (~600 dpi, ~300 dpi, ~150dpi and ~72 dpi). Can I do this without using imresize? Will meshgrid and inter2 work?

Answer 1

[Matt J]

griddedInterpolant would be easier/better. No need for meshgrid. E.g.

F=griddedInterpolant({1:3692,1:2812}, Image);

ImageFactor2=F({1:2:3692,1:2:2812});

[P]

Thank you. I agree with you. Griddedinterpolant is much easier.