Color deficiency
In 2.4, there is a question: Do we really need three sets of receptors? An what if we have only one? In this video, we will introduce some color deficiency, …
Course: Seeing: How the Brain Creates the Visual World
The three basic colors
In the previous week, we have talked about the eyes, and we have known that how neuron activity works. Let’s move on to the light, and see how our visual …
Color perception
We have talked about “to see is to believe,” and we will talk about if this is true by color this week. This is a very interesting topic, and we …
Differnet models of neural coding
We will discuss a philosophical term, qualia, which means the subjective feeling of seeing something. Also, we will introduce some different types of coding about qualia. This is the last …
The primary visual cortex
In this step, we will focus on V1, which is the first stop of the visual cortex. Follow our steps, and find out: were we born to see, or we …
Receptive field
The receptive field is related to lateral inhibition, which also makes us see the world sharper. Why is it? Picture Credit: 1. Cengage Learning 2. Cengage Learning 2014
Lateral inhibition
Have you ever seen the Hermann Grid that combines black square and white intersection? Many of us will find that there are gray dots in every intersection, why? In this …
The structure of retina (Part II)
Why do we have blindspots physically? In 1.3, we have introduced that there are 3 layers in the retina. In the steps, we will continue the structure of the retina, …
Theory of unconscious inference
In our daily life, we are confronted with overwhelming amount of information, how can the information be organized? Actually, our visual system is guessing and inferring all the time. In …
Perceiving scenes: Regularity
Regularity includes physical regularity and semantic regularity. What are they? In this video, we will introduce them.
Object perception Introduction
In the previous week, we learned that our retina is a two-dimensional system. How do we construct the three-dimensional world from the two-dimensional system?
The structure of retina (Part I)
Why is retina important? Because the retina’s function is to convert the light into neural signals. We will introduce the structure of the retina, and what kinds of layers it …
Size-related visual illisions
Have you ever seen that the two lines with outward arrows and inward? Maybe we already know that they are equal in length. But why? In this video, we will …
Stereopsis
Have you ever seen 3D movies? Why do we use special glasses when we are seeing this kind of movie? In this video, we will introduce how we create depth …
Binocular cues: Binocular disparity
In many cases, we use two eyes to see the world and differentiate depth. Therefore, we will discuss binocular cues, which means that we use two eyes.