Red-eye

Red-eye effect
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Red-Eye Effect
Red-Eye Effect refers to the way in which a subject's eyes tend to turn red in certain pictures.

Red-eye
Red-eye is a photographic phenomenon in which the light from a flash fires directly into a person's eye and reflects off the blood vessels within the eye; the result is an eye with a disconcerting red iris.
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Red-Eye: Sometimes it’s better to turn OFF the RED-EYE feature. There is a delay between the pre-flash which reduces red-eye and the actual exposure. As a result often you miss the shot, especially when photographing children.

Red-Eye Reduction - This flash mode actually sets of a short flash that causes the irises in the subjects eyes to close thereby eliminating the red-eye in the final image.

Red-Eye Correction.
This happens to all of us at some point, even professional photographers.

red-eye reduction
Using a flash can cause subjects in the final print to have red eyes. This is caused by the reflection of the flash burst on the iris of the eye.

Red-Eye The phenomenon in which the center portions of a subject's eyes appear as red spots in flash pictures. Reflected-Light Exposure Meter Measures light reflected from the subject.

Red-Eye Correction: Can be used to remove red-eye from a photo.
Trim: Used to create a cropped copy of a photo.
Monochrome: Converts photos to black and white, sepia and cyanotype.

Red-eye
The red glow from a subject's eyes caused by light from a flash reflecting off the blood vessels behind the retina in the eye. The effect is most common when light levels are low, outdoor at night, or indoor in a dimly-lit room.
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Red-eye reduction mode. A mode that fires a preliminary flash to close the iris of the eye before firing the main flash to take the picture.
Red-eye. An effect that causes peoples eyes to look red in flash exposures.

Red-eye
Appears in portraits as a red glow from the iris of the subject - caused by light reflecting off the retina.

Red-eye - Refers to the red glow from a subject's eyes caused by light from a flash reflecting off the blood vessels behind the retina in the eye.

Red-eye and Red-eye Reduction
Red-eye is an effect caused by an electronic flash reflecting off of the human eye and making it look red.

Red-Eye - An effect caused by an electronic flash reflecting off of the human eye and making it look red. Compact cameras with the flash located close to the lens suffer the worst from this problem.

red-eye
This is a common problem when using a camera mounted flash under low ambient lighting. The bright flash passes through the dilated pupils and iluminates the tissue at the back of the eye which glows red.
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Red-eye. An effect from flash photography that appears to make a person or animal's eyes glow red (or among animals, yellow or green).

Red-eye
The red-retina reflection seen in the center of the eyes when portraits are lit by a flash positioned too close to the lens axis.

Red-eye Reduction Mode
A special flash mode whereby a pre-flash or a series of low-powered flashes are emitted before the main flash goes off to expose the picture. This causes the pupil in the human eye to close and helps eliminate red-eye.

Red-eye Reduction
A method of reducing or eliminating red-eye from flash photographs by using a short burst of light, or pre-flash, to momentarily ‘stop-down’ the pupils of the subject’s eyes prior to the actual flash exposure.

Red-Eye
When photographing people, you'll often see images with what's called "red eye". The light from a flash has entered through the subject's pupil and reflected off the back of the eye (the retina) and back out to the camera.

red-eye reduction
common photography problems
What causes red eye in photographs is a very common question. What is Red Eye
There are probably millions of family albums with red eye in the photographs.

Red-Eye
Also known as pink-eye, this is when the light of an electronic flash hits the retina at the back of the eye directly. You may have seen this effect in wildlife films of animals shot at night.

Red-eye is problematic when using a tiny built-in digital camera flash because of it's proximity to the lens. Here are some techniques to minimize, hopefully eliminate, red-eye in photos.
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Red-eye removal
- On
- Off
Camera tries to digitally remove red eyes from images.

Red-Eye Removal, In-Camera - A technology that instantly removes red-eye from photos right on the camera without using a PC. This feature is unprecedented: an industry first.

Red-eye removal tool looks for the red colored pixels and change them to neutral gray or black. To remove red eye from a photo zoom in close to see the affected eye better. Then click the center of the eye or drag from the center of the eye.

Red-Eye
The un-natural, red-eyed look when photographed by a camera with the flash too close to the lens (as is the case with nearly all consumer digicams and film cameras).

Red-eye is the term used to describe the effect that can occur in photographs where the pupils of the eyes can take on a red color.

The red-eye effect can ruin a good photo
The reason that red eye doesn't occur so frequently in brighter lighting conditions is because the pupils of the human eyes aren't open enough in such conditions to allow enough light in to reflect off the ...

Once red-eye gets past the camera lens, your only real option is to try to correct it with your photo editing program.

Without red-eyed tree frogs, what would we shoot in Costa Rica?
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Sorry, but I have no idea why some of you can't get the link to DuChemin's eBooks to work.

For most red-eye, this technique will suffice. In extreme cases, more artistry is required. I usually try to avoid these extreme cases.
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FotoNation Red-Eye Technology automatic detection and correction of red-eye will be available on the Nokia N73, N80 and N93 series of camera phones.

example of red-eye caused by flash
Some camera flashes have a red-eye reduction mode, which sends a series of smaller flashes before the exposure so that the subject's pupils are contracted during the actual flash.

Get rid of red-eye. Some programs have a "red-eye removal" function built in. You can also do it manually by selecting the subject's eyes and altering the color balance to reduce redness.

Anti Red-eye Facility
Feature found in most cameras which reduces red-eye by firing a series of weak pre-flashes before the final flash exposure is made.
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Modify your pictures with Instant Fix (general correction), Adjust Brightness and Contrast, Sharpen (make details a little clearer), Trim (crop), Remove Red-Eye (for topside pictures), or the final option, ...

To be able to avoid red-eye, sometimes you need to avoid using flash. But in order to do this, you must have enough available lighting. So when you're doing this technique, you must be able to take portraits in well-lit areas.

With image editing software, you can darken or lighten a photo, rotate it, adjust its contrast, crop out extraneous detail, remove red-eye and more.

External flashes are used for many things including increased flash range and red-eye reduction.
Film: A photographic emulsion of an image that is fixed on a flexible, transparent base.

To overcome this, many cameras have a red-eye reduction mode, but it is, as the name suggests, only a reducer. It works by firing a pre flash to reduce the size of the pupils, and in doing so reduces the area of red.

Anti red-eye is used to reduce red-eye when taking a picture of a person looking straight at the camera.

I've experimented with its different flash modes and I found that the Fill-In flash works better than the Automatic Flash or Red-Eye Reduction mode. Even in taking pictures indoors with even lighting, I use the Fill-In flash mode.

- You could try to turn on the anti-red-eye function that probably exists on your camera. This function usually sends off a few short flashes, or it will shine some other sharp light into your "victim's" eyes.

Digital images are cool for emailing, and its great that you can fix red-eye or your friend's wrinkles using software, but just because you take digital images you don't have to learn to use a computer.

Be sure to get a camera with red-eye reduction mode. This works with a pre-flash prior to the flash used for exposure and does reduce the red-eye effect often seen when photographing people indoors.

Common edits to photos include the elimination of red-eye, which many software packages can do with a simple click of a button, and the removal of an unwanted item from a scene, ...

To avoid red-eye, have your subject look directly at the nearest light source right before they look at the camera. You can also use Automatic In-Camera Red-Eye fix to avoid the problem.

Face Detection and Automatic Red-eye Removal:To provide perfectly exposed and focused portrait shots, the XP170 uses Fujifilm’s latest Face Detection technology which is able to track up to 6 faces simultaneously.

A flash flattens children's faces, especially babies, and often causes red-eye. Instead, move the children near a brightly lit window for softer, more natural light.

Such flash units have several disadvantages - high risk of red-eye, poor modelling and low power - but they are hugely convenient and as they’re built into the camera, you’ll never have to scrabble around to find one.

The first and most obvious is that it can often lead to severe red-eye. This is caused by the strongly directional light shining from an angle close to the lens passing through the subject's enlarged pupil and bouncing off his retina.

Red-Eye Tool: You guessed right. It is used to remove red-eye.
Multiple Color Modes. Color modes that includes RGB and CMYK.
Unsharp Mask:. A sharpening tool with full control over amount, radius and threshold.

Technical measures for red-eye reduction effects with flash shooting. Red lightning eyes originate during the reflextion of the flash light in the retina of the eye.

Full, fill flash and flash with red-eye reduction. Full flash is for indoor or night time flash photography. Fill flash is for when your subject is back lit and you need to fill in the shadows.

Simple edits, like cropping, red-eye removal, etc. can make a mediocre photo look great. But use caution when making these types of edits.

Take a tour to see how HP in-camera red-eye removal works.
Using an HP printer
Red-eye removal is also available on many HP Photosmart printers and all-in-ones.

With an image editor you can make simple adjustments to your photos as cropping (resizing), color and exposure adjustment, red-eye removal and other simple adjustments that can make an otherwise bad photo a winner.

The other flash mode available is the red-eye reduction mode which we discussed earlier on the limitation of built-in flash. The default mode of most built-in flash is usually the auto mode, the camera will decide when it should fire the flash.

See also: Camera, Flash, Light, Photograph, Digital