Thread: Dog vision. Interesting simulation.

How do you know what I can see?

Originally Posted by Gibo

How do you know what I can see?

I have stellar vision Gibo. In the dark at night I can even see distant stars that are gazillions of miles away.

Originally Posted by Ruff

Movement? They see that better than you!

I wish my dog had seen the movement of the car that smashed into her on Sunday morning before it was too late

No major damage fortunately

I realise that most things posted on the internet are 100% correct and reliable, but I would still like to read the research that this video is purportedly based upon. I am not sure that this is a correct representation. Dogs, like many mammals have dichromatic vision. This means that they do not possess all of cones in the eye that we do. The cone that they are missing is the one that is sensitive to longer wavelengths such as red and orange. Similar to someone who is colour blind they have trouble distinguishing between middle-wavelength light (which includes green) and the longer wavelengths (red and orange). What they do possess are the cones sensitive to short-wave length light which includes the blue portion of the colour spectrum. While we can't talk to dogs we can talk to people who are colour blind and they see clearly, albeit with a limited range of colours. A study published in the journal for the Royal Society for Biological sciences in the early 90s showed that colour blind people (who have dichromatic vision) performed far between than people with normal vision in identifying camouflaged objects.

When I am training a dog I will often hide from them. When they are young I can hide from them in an open field. I just lie on the ground. But as they get older they find me quickly and can even find me reasonably quickly in heavy cover. I take from this that the dog's eyesight is not getting better it is just that they are learning to use all their senses. So while we think that they see us they have probably just smelt us.

I think the video is a screw up, technically if your alright on video editing you could tweek the colour fields and get it way more realistic.
They don't see in colour as we do so why not do the job properly?

With those colour changes clarity will change. That's just an out of focus mess that's NOT a real representation.

Oh hell, Pengy ... hope she ok ...

Originally Posted by EeeBees

Oh hell, Pengy ... hope she ok ...

All good thanks EeeBees. Luckily the car that hit her had a low front spoiler, so she basically got pushed along a bit.
A few staples and some TLC and she is well on the mend

Originally Posted by Pengy

Attachment 69647

As if you don't have enough to put up with that waddling owner you have! Get well wee dog.

Lucky wee dog ...

Close call pengy. Glad she's ok

Lucky escape Pengy! Hope she's on the mend.

A mere 48 hours after the event, little dog was acting like nothing happened

Hopefully (keeping thread on track here) she will make better use of her eyes around vehicles, in future.

what a load of bollocks. Where are the research links to back up the claim they have such poor resoution at distance,.

It's a fairly natural reaction Headcasee when your experiences with dogs, based 100% on how you see the world would find some of this hard to accept, primarily because you not in possession of the information of how they do work. When you actually understand the animal better, you train it better and the dog is more relaxed and accepting of lessons.

Here is some back ground information on that specific video.

Published on 23 Dec 2013
This is a rough simulation I rendered through the eyes of a dog. A dog's eyesight is very limited to color in respect to what we see; they can see (a lighter shade of) blue and yellow, but cannot distinguish red and green. They also have a visual acuity (contrast) of much less detail than we do. It is believed that most dogs have an eyesight equivalent from 20/50 to 20/75, however they have been known to identify their owner at a range of 800-900 meters due to their ability to visually discriminate motion (impressive)!

BTW, this is my Labrador. His name is Wilbur!


---------------------------------

Dog Vision filter details:

(Photoshop CS5 - rendering frames from original video)
Channel Mixer values


Output Channel: Red
R= +32%
G= +85%
B= -17%

Output Channel: Green
R= +25%
G= +68%
B= +7%

Output Channel: Blue
R= -1%
G= +1%
B= +100%

---------------------------------

(PowerDirector v12)
Visual acuity filter simulated through a configuration degree of "4" in the "Blur" effect filter.

Brightness effect reduced by a factor of 20% (this, however, does not account for lighter color tones, since there is a relative measure of brightness-detection with dogs due to their tapetum lucidum [a layer of tissue in the back of the eye which reflects visible light]).

(Video to Picture Image Converter)
Extract still frames from original video footage (.mts) from my Panasonic Lumix TS4.

(Photo Lapse 3)
Convert the edited images back to high-quality .avi format

For some reason, the recompiled video was slower, so I had to modify the length of the edited video to match the original.

Thank you for watching! As time progresses, so will my videos. Enjoy!

dichromacy color blind dogs red green blue yellow dog dogs eyesight eye vision see sees dog vision black white myth real actual accurate video footage simulation presentation

But let's look at the same information differently.


Before you jump and decide to make an internet dogs breakfast of a seriously important aspect of dealing with dogs... just think about this, and then think about how now knowing the strengths and weaknesses of your dogs vision how you will now be able to discern when they are using scent, or movement, hearing, or can see ducks after dark, or can't see something 20 feet away that is red..... The impact this knowledge makes is significant, but may seem subtle at first!

As you probably assumed... I'll have more for you.