Category: reference
reference
Human cell model
This is the most detailed model of a human cell to date. Taken using X-ray, nuclear magnetic resonance and cryonelectron microscopy datasets. c/o Ingerson and McGill
Internet Archive – a non-profit digital library
Internet Archive is a non-profit library of millions of free books, movies, software, music, websites, and more.
Free HDRI libraries
noahwitchell.com
http://www.noahwitchell.com/freebies
locationtextures.com
https://locationtextures.com/panoramas/
maxroz.com
https://www.maxroz.com/hdri/list
HDRI Haven
https://hdrihaven.com/
Poly Haven
https://polyhaven.com/hdris
Domeble
https://www.domeble.com/
IHDRI
https://www.ihdri.com/
HDRMaps
https://hdrmaps.com/
NoEmotionHdrs.net
http://noemotionhdrs.net/hdrday.html
OpenFootage.net
https://www.openfootage.net/hdri-panorama/
HDRI-hub
https://www.hdri-hub.com/hdrishop/hdri
.zwischendrin
https://www.zwischendrin.com/en/browse/hdri
Longer list here:
https://cgtricks.com/list-sites-free-hdri/
Cinematographers Blueprint 300dpi poster
The 300dpi digital poster is now available to all PixelSham.com subscribers.
If you have already subscribed and wish a copy, please send me a note through the contact page.
copypastecharacter.com – alphabets, special characters and symbols library
https://www.copypastecharacter.com
Most used ones:
Alt + 0149 • bullet point
Alt + 0153 ™ trademark symbol
Alt + 0169 © copyright symbol
Alt + 0174 ® registered trademark symbol
Alt + 0176 ° degree symbol
Alt + 0177 ± plus-or-minus sign
Alt + 0215 × multiplication sign
Alt + 12 ♀ female sign
Alt + 11 ♂ male sign
Alt + 13 ♪ eighth note
Alt + 14 ♫ beamed eighth note
Alt + 251 √ square root check mark
Alt + 8236 ∞ infinity
Alt + 24 ↑ up arrow
Alt + 25 ↓ down arrow
Alt + 26 → right arrow
Alt + 27 ← left arrow
Alt + 29 ↔ left right arrow
All of them:
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Photography basics: Production Rendering Resolution Charts
https://www.urtech.ca/2019/04/solved-complete-list-of-screen-resolution-names-sizes-and-aspect-ratios/
Resolution – Aspect Ratio | 4:03 | 16:09 | 16:10 | 3:02 | 5:03 | 5:04 |
CGA | 320 x 200 | |||||
QVGA | 320 x 240 | |||||
VGA (SD, Standard Definition) | 640 x 480 | |||||
NTSC | 720 x 480 | |||||
WVGA | 854 x 450 | |||||
WVGA | 800 x 480 | |||||
PAL | 768 x 576 | |||||
SVGA | 800 x 600 | |||||
XGA | 1024 x 768 | |||||
not named | 1152 x 768 | |||||
HD 720 (720P, High Definition) | 1280 x 720 | |||||
WXGA | 1280 x 800 | |||||
WXGA | 1280 x 768 | |||||
SXGA | 1280 x 1024 | |||||
not named (768P, HD, High Definition) | 1366 x 768 | |||||
not named | 1440 x 960 | |||||
SXGA+ | 1400 x 1050 | |||||
WSXGA | 1680 x 1050 | |||||
UXGA (2MP) | 1600 x 1200 | |||||
HD1080 (1080P, Full HD) | 1920 x 1080 | |||||
WUXGA | 1920 x 1200 | |||||
2K | 2048 x (any) | |||||
QWXGA | 2048 x 1152 | |||||
QXGA (3MP) | 2048 x 1536 | |||||
WQXGA | 2560 x 1600 | |||||
QHD (Quad HD) | 2560 x 1440 | |||||
QSXGA (5MP) | 2560 x 2048 | |||||
4K UHD (4K, Ultra HD, Ultra-High Definition) | 3840 x 2160 | |||||
QUXGA+ | 3840 x 2400 | |||||
IMAX 3D | 4096 x 3072 | |||||
8K UHD (8K, 8K Ultra HD, UHDTV) | 7680 x 4320 | |||||
10K (10240×4320, 10K HD) | 10240 x (any) | |||||
16K (Quad UHD, 16K UHD, 8640P) | 15360 x 8640 |
colorhunt.co
Color Hunt is a free and open platform for color inspiration with thousands of trendy hand-picked color palettes.
Capturing the world in HDR for real time projects – Call of Duty: Advanced Warfare
Real-World Measurements for Call of Duty: Advanced Warfare
www.activision.com/cdn/research/Real_World_Measurements_for_Call_of_Duty_Advanced_Warfare.pdf
Local version
Real_World_Measurements_for_Call_of_Duty_Advanced_Warfare.pdf
The difference between eyes and cameras
https://www.quora.com/What-is-the-comparison-between-the-human-eye-and-a-digital-camera
https://medium.com/hipster-color-science/a-beginners-guide-to-colorimetry-401f1830b65a
There are three types of cone photoreceptors in the eye, called Long, Medium and Short. These contribute to color discrimination. They are all sensitive to different, yet overlapping, wavelengths of light. They are commonly associated with the color they are most sensitive too, L = red, M = green, S = blue.
Different spectral distributions can stimulate the cones in the exact same way
A leaf and a green car that look the same to you, but physically have different reflectance properties. It turns out every color (or, unique cone output) can be created from many different spectral distributions. Color science starts to make a lot more sense when you understand this.
When you view the charts overlaid, you can see that the spinach mostly reflects light outside of the eye’s visual range, and inside our range it mostly reflects light centered around our M cone.
This phenomenon is called metamerism and it has huge ramifications for color reproduction. It means we don’t need the original light to reproduce an observed color.
http://www.absoluteastronomy.com/topics/Adaptation_%28eye%29
The human eye can function from very dark to very bright levels of light; its sensing capabilities reach across nine orders of magnitude. This means that the brightest and the darkest light signal that the eye can sense are a factor of roughly 1,000,000,000 apart. However, in any given moment of time, the eye can only sense a contrast ratio of one thousand. What enables the wider reach is that the eye adapts its definition of what is black. The light level that is interpreted as “black” can be shifted across six orders of magnitude—a factor of one million.
https://clarkvision.com/articles/eye-resolution.html
The Human eye is able to function in bright sunlight and view faint starlight, a range of more than 100 million to one. The Blackwell (1946) data covered a brightness range of 10 million and did not include intensities brighter than about the full Moon. The full range of adaptability is on the order of a billion to 1. But this is like saying a camera can function over a similar range by adjusting the ISO gain, aperture and exposure time.
In any one view, the eye eye can see over a 10,000 range in contrast detection, but it depends on the scene brightness, with the range decreasing with lower contrast targets. The eye is a contrast detector, not an absolute detector like the sensor in a digital camera, thus the distinction. The range of the human eye is greater than any film or consumer digital camera.
As for DSLR cameras’ contrast ratio ranges in 2048:1.
(Daniel Frank) Several key differences stand out for me (among many):
- The area devoted to seeing detail in the eye — the fovea — is extremely small compared to a digital camera sensor. It covers a roughly circular area of only about three degrees of arc. By contrast, a “normal” 50mm lens (so called because it supposedly mimic the perspective of the human eye) covers roughly 40 degrees of arc. Because of this extremely narrow field of view, the eye is constantly making small movements (“saccades”) to scan more of the field, and the brain is building up the illusion of a wider, detailed picture.
- The eye has two different main types of light detecting elements: rods and cones. Rods are more sensitive, and detect only variations in brightness, but not color. Cones sense color, but only work in brighter light. That’s why very dim scenes look desaturated, in shades of gray, to the human eye. If you take a picture in moonlight with a very high-ISO digital camera, you’ll be struck by how saturated the colors are in that picture — it looks like daylight. We think of this difference in color intensity as being inherent in dark scenes, but that’s not true — it’s actually the limitation of the cones in our eyes.
- There are specific cones in the eye with stronger responses to the different wavelengths corresponding to red, green, and blue light. By contrast, the CCD or CMOS sensor in a color digital camera can only sense luminance differences: it just counts photons in tens of millions of tiny photodetectors (“wells”) spread across its surface. In front of this detector is an array of microscopic red, blue, and green filters, one per well. The processing engine in the camera interpolates the luminance of adjacent red-, green-, or blue-filtered detectors based on a so-called “demosaicing” algorithm. This bears no resemblance to how the eye detects color. (The so-called “foveon” sensor sold by Sigma in some of its cameras avoid demosaicing by layering different color-sensing layers, but this still isn’t how the eye works.)
- The files output by color digital cameras contain three channels of luminance data: red, green, and blue. While the human eye has red, green, and blue-sensing cones, those cones are cross-wired in the retina to produce a luminance channel plus a red-green and a blue-yellow channel, and it’s data in that color space (known technically as “LAB”) that goes to the brain. That’s why we can’t perceive a reddish-green or a yellowish-blue, whereas such colors can be represented in the RGB color space used by digital cameras.
- The retina is much larger than the fovea, but the light-sensitive areas outside the fovea, and the nuclei to which they wire in the brain, are highly sensitive to motion, particularly in the periphery of our vision. The human visual system — including the eye — is highly adapted to detecting and analyzing potential threats coming at us from outside our central vision, and priming the brain and body to respond. These functions and systems have no analogue in any digital camera system.