For questions regarding the visual system, which serves to transduce light energy into neural impulses, or regarding visual perception, how we interpret such incoming visual information.

learn more… | top users | synonyms (1)

31
votes
5answers
23k views

Why would the brain flip the images perceived by your eyes?

The following is a common scientific statement, which you don't have to google long for to find: The eye views images upside-down in the manner of a camera lens, but our brains reinterpret this ...
5
votes
2answers
1k views

Where is the visual “image” that we “see” finally assembled?

David Hubel's online book, Eye, Brain and Vision describes in great detail our early visual system. The image that we are conscious of when we open our eyes goes through a complex path: The final ...
18
votes
3answers
841 views

Is it possible for certain people to perceive colors differently?

What if someone perceives a color as 'red' when it is actually 'green'? Since different people have preferences for different colors, and colors are perhaps constructed in the mind, is it possible ...
5
votes
2answers
231 views

Is there a difference between visual short term memory and visual working memory?

As far as I can tell the two terms are used interchangeably. Do these two separate terms exist for historical reasons, or is there a distinction I'm missing?
8
votes
3answers
1k views

Are colors real?

We know that we distinguish colors when they fall on our photo receptors in our eyes and neurons pass its signals to our brain to recognise them as the specific colors. How accurate is it? For ...
9
votes
2answers
996 views

What's the explanation of this optical illusion where many coloured arcs radiate from a central point?

I saw the image below on facebook. At first, I thought it's a GIF animation since it doesn't appear static but it turned out to be a static JPEG image and the apparent motion is caused by the brain. ...
4
votes
1answer
393 views

Does looking into a mirror relieve eye strain in a similar way to looking at distant objects?

Sometimes when having an eye exam the eye chart is viewed through a mirror to increase the distance between the person and the chart. When using consoles, it is recommended to look away from the ...
11
votes
3answers
1k views

Is it possible to improve reading speed and visual comprehension by doing exercises?

Background I'm trying to capture detailed information from the images in my visual memory, mainly text. My daily life requires reading many documents on varying topics. I want to increase my reading ...
11
votes
2answers
190 views

To what extent do individuals vary in their ability to mentally visualise?

Background: Yesterday I was shocked when a friend of mine told me that he can see only "completely black darkness" when he closes he eyes. When I close my eyes, I can see some images or "movies" of ...
20
votes
5answers
674 views

Why do we prefer visually aligned objects?

We all know visual alignment is one of the foundations of design. Everything must be aligned with everything else. We also know that when things are aligned it is easier to process information. My ...
13
votes
2answers
338 views

What concepts of perception should designers be aware of when designing?

Visual perception is a huge topic, much of which is relevant to the work of a designer. I have identified topics in visual memory, visual cognition and colour perception that are relevant, and I'm ...
11
votes
1answer
250 views

How do humans control saccades?

I've gathered the standard rational for a visual system utilizing saccades from perception textbooks: the neural cost of processing an entire scene at a high level of detail would be prohibitive, but ...
21
votes
1answer
1k views

Why is white on black considered higher contrast than black on white?

While researching to answer Why are "Inverted Colors" considered an accessibility feature? I noticed the puzzling claim that "White text on a black background is a higher contrast to the opposite, so ...
14
votes
1answer
168 views

How is the size of a video related to its perceived quality?

Video is often presented at different sizes. On the Internet, many websites provide quite a few size settings. In the store, you can buy TVs of many different sizes. In both cases, it's the same ...
10
votes
1answer
144 views

Are the center surround receptive fields learnt or inherited?

I know that neurons higher in visual pathways can learn their receptive fields after birth, but what about the connections between bipolar cells and Amacarine cells which form center/surround on/off ...
8
votes
2answers
479 views

Does perception have a “frame rate”?

Are the objects of visual perception processes divisible into individual, still frames, like video is? If so: Are the perceptions from different senses synced to the same frequency? Are these ...
7
votes
2answers
142 views

Are there physical techniques to relieve eye strain? [closed]

I asked a question about eye strain Does looking into a mirror relieve eye strain in a similar way to looking at distant objects?. Are there any physical exercises or techniques that can help to ...
7
votes
1answer
1k views

Is Apple's iPhone Retina Display really accurate to human eye resolution?

Apple based their Retina Display on the following claim, as cited by Wikipedia: The display has a contrast ratio of 800:1. The screen is marketed by Apple as the "Retina Display", based on the ...
3
votes
1answer
174 views

Are there any cognitive models for image interpretation?

Are there any cognitive models which can be used for image interpretation. I have tried to find some specific models which can be used for image interpretation but have not been able to find any ...
2
votes
1answer
119 views

Effective sampling rate in human visual system

The [stroboscopic effect][1] is often explained as one of the problems of sampling. If sample rate is too low, you might have the impression of the signal frequency being low or even reverse. There ...