a blog of links related to computer animation and production technology Sponsored by ReelMatters.com

Thank you for visiting!! Please bear with us while we go through a redesign of the blog. New features and phone support on the way!

Eye retina’s Bipolar Cells, Horizontal Cells, and Photoreceptors

In the retina, photoreceptors, bipolar cells, and horizontal cells work together to process visual information before it reaches the brain. Here’s how each cell type contributes to vision:

 

1. Photoreceptors

  • Types: There are two main types of photoreceptors: rods and cones.
    • Rods: Specialized for low-light and peripheral vision; they help us see in dim lighting and detect motion.
    • Cones: Specialized for color and detail; they function best in bright light and are concentrated in the central retina (the fovea), allowing for high-resolution vision.
  • Function: Photoreceptors convert light into electrical signals. When light hits the retina, photoreceptors undergo a chemical change, triggering an electrical response that initiates the visual process. Rods and cones detect different intensities and colors, providing the foundation for brightness and color perception.

 

2. Bipolar Cells

  • Function: Bipolar cells act as intermediaries, connecting photoreceptors to ganglion cells, which send signals to the brain. They receive input from photoreceptors and relay it to the retinal ganglion cells.
  • On and Off Bipolar Cells: Some bipolar cells are ON cells, responding when light is detected (depolarizing in light), and others are OFF cells, responding in darkness (depolarizing in the absence of light). This division allows for more precise contrast detection and the ability to distinguish light from dark areas in the visual field.

 

3. Horizontal Cells

  • Function: Horizontal cells connect photoreceptors to each other and create lateral interactions between them. They integrate signals from multiple photoreceptors, allowing them to adjust the sensitivity of neighboring photoreceptors in response to varying light conditions.
  • Lateral Inhibition: This process improves visual contrast and sharpness by making the borders between light and dark areas more distinct, enhancing our ability to perceive edges and fine detail.

 

These three types of cells work together to help the retina preprocess visual information and perception, emphasizing contrast and adjusting for different lighting conditions before signals are sent to the brain for further processing and interpretation.

 

 

Akiyoshi Kitaoka – Surround biased illumination perception

https://x.com/AkiyoshiKitaoka/status/1798705648001327209

 

The left face appears whitish and the right one blackish, but they are made up of the same luminance.

 

 

https://community.wolfram.com/groups/-/m/t/3191015

 

Illusory staircase Gelb effect 
https://www.psy.ritsumei.ac.jp/akitaoka/illgelbe.html

 

(more…)

Riot ‘Arcane’ – the Priciest Animated Series Ever

https://variety.com/2024/biz/news/riot-games-arcane-hollywood-netflix-most-expensive-animated-series-ever-1236196655/

 

Sources familiar with details of the production pegged the cost of the first nine 40-minute episodes at north of $80 million; the second batch of nine about to air has a price tag approaching $100 million. What drove the cost far beyond typical animation expenses, insiders say, were both a labor-intensive approach and frequent cost overruns triggered by delayed script deliveries after the second season was put into production with only a fraction of the season written.

 

But even more eyebrow-raising than the production cost was that Riot spent $60 million of its own money to promote the first season of “Arcane,” exponentially more than a studio would typically spend for a show it isn’t distributing — and far more than Netflix itself spent ($4 million per episode). Reps for the streaming service declined to comment for this article.

 

Popular Searches unreal | pipeline | virtual production | free | learn | photoshop | 360 | macro | google | nvidia | resolution | open source | hdri | real-time | photography basics | nuke

Subscribe to PixelSham.com RSS for free
Subscribe to PixelSham.com RSS for free

FEATURED LIGHTING POSTS