"Red-eye" removal for dogs

You would have to figure out a way to substitute yellow for red in any application that can do that. I tried to modify a Photoshop action to remove redeye without much success. I'm guessing it is due to my lack of knowledge in making actions in the first place. Have you Googled that subject?

I have a couple of actions for Photoshoop that remove redeye very efficiently. But it just doesn't work on animal eyes. Somehow one has to change the red portion of the action to yellow or whatever is the predominate color in animal "red" eye.

If you have PE, use the eyedropper tool to sample the color from a good part of the eye, which will make that the foreground color. Now switch to the Pencil tool. Enlarge the view of the eye until you clearley see the pixels as a grid. Click once in each bad pixel with the pencil tool. Remember to leave a few light pixels for a catchlight.

Loved seeing this topic. Isn't the internet great! Continual surprises.

I have the same problem. My dog's eyes look aqua. The solution suggested didn't work very well for me, partially because the colored area is huge and there was too little variation. (How do you make the pencil partially transparent in PE?)

What I tried was this.
1. In Photoshop Elements, use the red-eye reduction tool. This seems to blur the area and make it gray.
2. use the magic wand to select the colored (now gray) protion of the eye.
3. Adjust the brightness in the selected area as far down as it will go.
4. touch up, especially borders and bright spots.
5. flatten image.
6. save

One of the problems I have is that I don't exactly know what the dog's eye should look like. I don't think the pupil should end up as dark as a human pupil. When it's black, it looks flat and strange.

The borders of the selected area remain a problem; I'd like to soften the transition. Otherwise, a big improvement, but not a solution.

Thanks, Karen P.

I'm making progress, but it's not yet a simple recipe. My dog is big (150 lbs) and his eyes are big.I use Photoshop Elements 2.0, and the tools are there. Getting the eyes right is tricky.

I'm surprised that Photoshop Elements red-eye tool converts the colored area to gray. I guess that is one of it's tricks. But it doesn't seem to change brightness. It also seems to do some local averaging.

John

The Red Eye tool in PE 2 merely changes the hue to that of the chosen replacement color. It doesn't change the saturation or intensity of the original color, which is why it usually just turns red eye from vampire red to werewolf grey. The PE 3 red eye tool is better, but Adobe's tool is not designed for animal green eye, and it never works with blown-out white eyes.

Basically humans have one reflective layer and animals have two. Here is an explanation I found with a Google search:

"The consistently red color of the human reflex derives from the red blood pigment hemoglobin. Light from the flash picks up the red from blood vessels encountered during its bounce off the retina, just as reflected sunlight picks up the color of a red sweater.

Why, then, do animal reflexes come in so many other colors and seldom in red? The answer lies in the tapetum lucidum, a highly reflective, variably pigmented membrane backing the retina in animals with good night vision (including dogs, cats and most domestic animals) but entirely absent in humans. The tapetum lies directly behind the retinal photoreceptors. (Nova's The Nocturnal Eye nicely illustrates the anatomy).

The tapetum enhances low-light vision by giving retinal photoreceptors a 2nd crack at any incoming light that manages to escape absorption (detection) on the first pass. In dogs, at least, an additional boost may come from tapetal fluorescence, which shifts incoming wavelengths into better alignment with the peak spectral sensitivities of the photoreceptors. Tapetal pigments surely come into play here.

When tapetal pigment is present, its color dominates the color of a given animal's reflex. Tapetal color loosely follows coat color. For example, black coats and green reflexes tend to go together. Most dogs and cats show a blue reflex as their eyes mature in the first 6-8 months of life. Pigment-poor animals like blue point Siamese cats with no tapetal pigmentation show a red reflex for the same reason humans do."

Hope this is useful/helpful/just interesting!