Archivi categoria: eyes

Photoshop Tip: How to Make Eyes ‘Pop’ in 30 Seconds

There’s a simple way to make your subject’s eyes pop in a portrait, and it doesn’t involve touching vibrance, saturation, luminosity, or any other color-based edit. In fact, you can make the full edit in 30 seconds.

This quick Photoshop tip comes to us from photographer Mathieu Stern, who uses a simple sharpening technique to make his subjects’ eyes stand out. Here’s the step by step:

1. Duplicate your background layer (your portrait).

2. Go to Filter > Other > High Pass and apply a High Pass filter with a radius of 10 pixels.

3. Set the layer blend mode to Soft Light

4. Alt+Click on the layer mask icon to create a black layer mask

5. Use a soft brush to pain white over just your subject’s eyes.

That’s it. Done right, the filter will take your subject’s eyes from this:

To this:

Helping them to stand out without that “nuclear eyes” look that so many saturation-obsessed shooters have accidentally created before. Check out the full demo in the video above, and if you like this video, head over to Mathieu’s YouTube channel for more.

Here’s the Science Behind Those Weird Floaters In Your Eyes

If you look at a blank computer screen or even up at the sky, there's a good chance you'll see some weird floating globs in your field of vision. You can't focus on them and they never stay still, but they're there and they can be really annoying. What are they? Well, the clever animated video above explains just that.

The video also explains the phenomenon where you sometimes see dots of light shooting around in the sky with little dark tails.

If you want a full explanation, you'll have to watch the video because paraphrasing medical jargon is not my specialty, but I can say that floaters in your eye don't mean that you're dying and there's also not gunk on the surface of your eyes.

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Scritto da Popular Photography

Cockroaches Have Eyes Capable of Long Exposures for Seeing in the Dark

cockroach

Did you know that some creatures can actually see the world in long exposures? Scientists recently discovered that cockroaches are the latest insect found to have that feature built into their eyes and brains. It allows the resilient little bugs to see in near-pitch black environments.

Scientific American reports that researchers at the University of Oulu in Finland inserted a harmless recording instrument into a roach’s eyeball in order to document electric signals that are generated when the photoreceptor cells detect an incoming photon.

They found that cockroach eyes are able to absorb one photon every 10 seconds in conditions equivalent to a moonless night. Although humans and most creatures wouldn’t be able to process light signals at that rate, cockroaches pool the photon signals they detect over time, forming a long exposure image of the scene that allows them to see the world.

The idea is similar to how cameras can pool photons on film and sensors with long exposure times in order to capture properly exposed photos in low-light settings.

A nocturnal bee and a dung beetle are reportedly two other species that are known to use similar long exposure vision techniques in the dark. Scientists are now trying to figure out how this natural ability works in order to improve our artificial night vision technologies.

(via Scientific American via Imaging Resource)


Image credits: Header photograph by jai Mansson