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These are results for outside of 3d mirrors and printed images what dimension flattened are cameras or eyes in usages not 3d?
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AI Overview
+12
Outside of 3D mirrors and printed images, standard cameras and human eyes naturally flatten the 3D world into two-dimensional (2D) planar projections. The 3D world is reduced to a 2D representation consisting of length and width (pixels/retina cells) on a flat image plane, losing depth.
Facebook·People Incorrectly Correcting Other People
+3
Here are the specific, non-3D flattened usages:
1. Optical/Biological Image Planes (Retinas & Sensors)
Human Eye (The Retina): The retina at the back of the eye is a 2D surface that receives an inverted 2D image projected by the lens. The brain later interprets this as 3D.
Camera Sensors (CCD/CMOS): Digital cameras convert 3D light rays onto a 2D grid of pixels.
Pinhole Camera: Light passes through an aperture, projecting an inverted 2D scene onto a back plane, demonstrating the mathematical projection of 3D to 2D.
Facebook·People Incorrectly Correcting Other People
+4
2. Digital & Computer Vision Representations
2D Machine Vision (Inspection/Sorting): Cameras used in robotics or automation capture 2D images to analyze length and width for pattern recognition, barcode reading, or quality inspection without measuring depth.
RGB Images (Standard Photography): Standard photographs or video frames (e.g., JPEG) are digital 2D representations, with pixels storing only color information, losing the true 3D spatial relationship.
Grayscale Images/Canny Edges: A 3D object can be flattened into a 2D, monochrome sketch focusing only on outlines.
Orthographic Projections: Engineering or CAD software converts 3D models into 2D orthogonal views (top, side, front) which show true dimensions without perspective distortion.
Medium·Vikram Setty
+4
3. Data & Sensory Reductions
2D Pose Estimation: Cameras track human joint locations and map them onto a 2D plane (x, y) rather than a 3D volume (x, y, z), useful for motion tracking.
Focus Mapping: A camera or eye uses lens focus to estimate distance (focusing back and forth), but the input itself remains a flat image.
Time-series/Memory: A 3D object in motion can be represented as a sequence of 2D snapshots, which the brain or computer combines to understand change over time (1 spatial + 1 temporal mapping).
PubMed Central (PMC) (.gov)
+3
5:24
How does the eye compare to a camera? How do they work, and ...
Facebook·Physics Girl
What would seeing in 3D look like, I mean real 3D not 2D ... - Quora
Feb 11, 2020 — * Human eyes only see in 2D. Theoretically, how would an eye that sees in 3D work? How would it look? * The light from the objects don't really have any 3D info...
Quora
9:25
TIL that human are only capable of seeing in 2D not 3D, our brain ...
Reddit·Up and Atom
ELI5: Do we SEE in 3D or is our Space 3D? To see things in 4D do ...
Nov 27, 2022 — We see in 2D. Our brain does its best to extrapolate an image of reality, which is 3D. To "see" in 4D space , you need a brain that has experience with 4D space...
2D vs 3D Vision: Understanding Differences, Depth Perception ...
Basics of 2D and 3D Machine Vision Systems. ... Two-dimensional (2D) machine vision systems can capture images and analyze them on a single plane, that is, they...
Mécatronique Solutions inc.
Scene Representations in 3D Computer Vision | by Vikram Setty
Aug 17, 2024 — Vikram Setty. 7 min read. Aug 17, 2024. 13. 1. The most common way to represent scenes in 2D Computer Vision is using images with pixels. But how do we do it in...
Medium·Vikram Setty
Natural scenes reveal diverse representations of 2D and 3D body ...
Jun 3, 2024 — By projecting joint locations from 3D to 2D and thus discarding depth information, we further calculated view-dependent 2D pose dissimilarity using 2D joint loc...
PubMed Central (PMC) (.gov)
Inside Machine Vision Systems: How 2D and 3D Vision Works?
Jan 13, 2025 — In 2D machine vision, image formation relies on the light reflected from the target object. Variations in ambient or artificial lighting within the field of vie...
www.photoneo.com
Do humans see in 2D or 3D? - Facebook
Jun 24, 2024 — I'm going to put this right here real quick. This is a scientific fact. It's not an interpretation or an opinion. We have known this fact for decades. Go read t...
Facebook·People Incorrectly Correcting Other People
Canon Science Lab | Photographs
Digital Cameras Record Light as Digital Data Digital cameras employ image sensors, such as CCDs or CMOS sensors, in place of film. CCDs are collections of tiny,
Canon Global
12:54
Image formation: pinhole camera: perspective projection, 2-D
YouTube·Hany Farid, Professor at UC Berkeley
Class 7 chapter 15 Representation of 3D in 2D Explain - Filo
Sep 20, 2025 — Common methods to represent 3D objects in 2D: * Orthographic Projection: Shows different views of the object (front, top, side) separately. ... * Isometric Draw...
Filo
As 3-dimensional beings, do we really have 3-dimensional vision?
Aug 14, 2013 — Our vision really isn't really 3-dimensional in the usual sense. If you fix your vision to a single point at something which is not moving, there's no way for y...
Physics Stack Exchange
50s
Can you see the 3d image in this 2d image?
YouTube·vt.physics
Scene Representations in 3D Computer Vision | by Vikram Setty
Aug 17, 2024 — The only difference is that 2D computer vision methods represent 3D scenes as some form of a 2D image (grayscale, RGB, panoptic segmentation, Canny Edges, etc).
Medium
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Me and my friend were discussing why looking at yourself in the mirror is different from looking through the camera on your phone, and I said it was because ...
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Your friend is wrong. The mirror works with angles and so the light that strikes your right ...
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You'll have to clarify what you mean by "different." Depending on what you mean, there could ...
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I suspect you haven’t done any, or at least very little, research on this Olli? When added ...
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Top answer · 30 votes
This is a pretty good description of it. So yes, they were pretty much correct
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Well our brains do a lot of heavy lifting. We do live in a 3d world. Each eye only sees ...
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I love when the admins let in one that just embarrasses the OP 😂🤣🤦🏻♀️
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harsh. I guess they meant your one eye sees more or less an image with up-down left-right, ...
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How brave of you to put yourself as the incorrector! ✅ People ✅ incorrectly ...
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The Science Behind 3D Vision | Pennachio Eye | Clermont
3D vision, also known as stereopsis, is the ability to perceive the world in 3 dimensions—height, width and depth. This depth perception is essential for ...
scienceforums.com
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Mirror, 2D or 3D? - Physics and Mathematics - Science Forums
Mar 1, 2006 — A mirror image is depending on what it mirrors. A flat mirror in 3D space will have a 2D surface. A curved mirror in 3D space will have a 3D surface.
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2.8K+ reactions · 2 months ago
How does the eye compare to a camera? How do they work ...
It's not the focus of the eye, it is the alignment of the images from the 2 eyes. You have to look past the picture.
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We can only see things by processing the sensory inputs in our brains. It’s not possible ...
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Viewing 3D Photographs - Richard A. Bartle
The technique I use here for 3D images assumes on stereoscopic vision. It therefore follows that if you don't have stereoscopic vision (eg. you have a lazy eye) ...
Missing: mirrors printed
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