I am a very visually oriented person. I find that if a visual image can be made of an idea, I usually find it much easier to understand. So, I want to build a model that will allow me visualize the output of the retina, beginning with the fovea.
Well, I have not really developed this model to any great extent, but some primitive ideas that will form the base of this model can be seen in the this powerpoint presentation. Keep in mind, it is a module developed to introduce some of the implications of receptive fields to undergraduates. Its summation model is primitive and only the equivalent of X cells are indicated. One of the current great limitations of this demonstration is how fixed all the parameters of the model are.
The current model development has proceeded along two lines: a simple one-dimensional model using excel, and a full-two dimensional model using Mathematica®. The excel version is nice because its results are manipulable directly through the web on pages that I have posted, as long as you have the Office 2000tm web components on your computer. You can begin these pages here. The current limitations of this Excel model are briefly noted here.
The Mathematica® cannot be used directly through the web, but I am creating pages showing you the results and you can download the notebook files and run them on your machine if you so desire.
Ultimately, I would like to manipulate the following aspects of the model:
This model also needs to be two-dimensional as well.
In the Mathematic version of the model you can: