Look at the above image. The higher the peaks, the more sensitive your eyes are to contrasts at those frequencies. Ian Goodfellow spotted the image in a scientific paper
about spatial frequency analysis and brilliantly observed
that "It's like a graph that is made by perceiving the graph itself." Over at Mind Hacks, Tom Stafford explains the science of spatial frequency, the same concept behind the classic "Marilyn Einstein
" image below that was created by Aude Oliva in 2007. From Mind Hacks
Spatial frequency means how often things change in space. High spatial frequency changes means lots of small detail. Spatial frequency is surprisingly important to our visual system – lots of basic features of the visual world, like orientation or motion, are processed first according to which spatial frequency the information is available at...
Spatial frequency is also why, when you’re flying over the ocean, you can see waves which appear not to move. Although your vision is sensitive enough to see the wave, the motion sensitive part of your visual system isn’t as good at the fine spatial frequencies – which creates a natural illusion of static waves.
See Einstein below? Now go a few steps back from your screen and look again:
At this year’s Conference on Computer Vision and Pattern Recognition, researcher Chen Chen presented a cool project that vastly improves the quality of images captured in low-light conditions. Via his presentation: Imaging in low light is challenging due to low photon count and low SNR. Short-exposure images suffer from noise, while long exposure can induce […]
Yeast has brought a lot of joy into the world, but its evolutionary origins were unclear until scientists did a worldwide genomic survey of the humble organism. Based on the genetic diversity of strains found in China, they concluded that its origin is almost certainly in that part of the world.
I'm one of several guests appearing at the first-ever Interplanetary Festival, coming up Jun 7/8 in Santa Fe, New Mexico; it's a science festival that's part of the larger Futurition|Santa Fe festival, which includes live music, open air events, gaming, art installations, performances, and all-ages events.
The workday is long, and inevitably, you’re going to find yourself needing to take a break from the daily grind. With Mini Materials Miniature Cinder Blocks, you can take some time for yourself and decompress by turning your desk into a miniature construction site. They’re available today in the Boing Boing Store for $22.49. Handmade […]
Handheld radios might seem a bit archaic, but in an emergency situation, few things will keep you as reliably connected to the outside world. This Emergency Multi-Function Radio & Flashlight takes the utility of the tried-and-true radio and combines it with a powerful flashlight and self-sufficient energy system. It’s available in the Boing Boing Store for […]
Few programming languages boast the versatility and user-friendliness of Python, which is why it’s the first language of choice for many aspiring programmers. Regardless of your experience level, you can take the first step to becoming Python-savvy with the Python 3 Bootcamp Bundle, available in the Boing Boing Store for $35 this week. Featuring more than […]