A graph that is made by perceiving it – Mind Hacks
The distinction sensitivity serve as displays how our sensitivity to contrasts is affected by spatial frequency. You can check it the use of gratings of alternating mild and darker color. Ian Goodfellow has this neat statement:
It’s a graph that makes itself! The symbol is the uncooked knowledge, and by interacting together with your visible gadget, you understand a discontinuity which illustrates the bounds of your belief.
Spatial frequency approach how frequently issues exchange in area. High spatial frequency adjustments approach a number of small element. Spatial frequency is unusually essential to our visible gadget – a number of elementary options of the visible international, like orientation or movement, are processed first in step with which spatial frequency the ideas is to be had at.
Spatial frequency is at the back of the Einstein-Marilyn phantasm, wherein you spot Albert Einstein if the picture is massive or shut up, and Marilyn Monroe if the picture is small / noticed from a distance (check out it! You’ll have to stroll away out of your display screen to peer it exchange).
Depending on distance, other spatial frequencies are more straightforward to peer, and if the ones spatial frequencies encode other data then you’ll be able to make a hybrid symbol which switches as you adjust your distance from it.
Spatial frequency is additionally why, while you’re flying over the sea, you’ll be able to see waves which seem to not transfer. Although you imaginative and prescient is delicate sufficient to peer the wave, the movement delicate a part of your visible gadget isn’t as just right on the nice spatial frequencies – which creates a herbal phantasm of static waves.
The distinction sensitivity symbol on the head of this submit varies distinction most sensible to backside (low to prime) and spatial frequency left to proper (low to prime). The level at which the bars forestall taking a look distinct selections out a ridge which rises (to a most at about about 10 cycles in line with levels of attitude) after which drops off. Where this ridge is will range relying in your specific visible gadget and what distance you view the picture at. It is without equal individualised knowledge visualisation – it selections out the specific sensitivity of your individual visible gadget, in actual time. It’s even interactive, right away adjusting for non permanent adjustments in parameters like brightness!
More on hybrid pictures (together with some neat examples): Oliva, A., Torralba, A., & Schyns, P. G. (2006, July). Hybrid pictures. In ACM Transactions on Graphics (TOG) (Vol. 25, No. three, pp. 527-532). ACM.
More at the visible gadget, together with the distinction sensitivity serve as: Frisby, J. P., & Stone, J. V. (2010). Seeing: The computational solution to organic imaginative and prescient. The MIT Press.