Category: reference

https://free3d.com/3d-models/tree

 

http://lilsuika.deviantart.com/art/Evolution-of-Chinese-Clothing-and-Cheongsam-Qipao-353219884

http://mymodernmet.com/animals-eyes-up-close/

http://vesner.deviantart.com/art/100-texture-studies-360570335

http://www.derekjenson.com/3d-blog/ies-light-profiles

 

https://ieslibrary.com/en/browse#ies

 

https://leomoon.com/store/shaders/ies-lights-pack

 

https://docs.arnoldrenderer.com/display/a5afmug/ai+photometric+light

 

IES profiles are useful for creating life-like lighting, as they can represent the physical distribution of light from any light source.

The IES format was created by the Illumination Engineering Society, and most lighting manufacturers provide IES profile for the lights they manufacture.

 

 

Arnold file

 

https://www.real-ies.com/

http://digitalsynopsis.com/design/photography-creative-lighting-techniques/

http://techlog360.com/2016/10/best-web-design-tools/

http://www.3ders.org/articles/20160724-3d-animation-breakthrough-by-disney-enables-realistic-3d-eye-reconstruction-from-a-single-photo.html

https://logopond.com/

http://fontello.com/

https://www.google.com/fonts

https://voxilion.com/

http://www.lightillusion.com/luts.html

https://www.shutterstock.com/blog/how-use-luts-color-grading

 

A LUT (Lookup Table) is essentially the modifier between two images, the original image and the displayed image, based on a mathematical formula. Basically conversion matrices of different complexities. There are different types of LUTS – viewing, transform, calibration, 1D and 3D.

 

http://www.xdcam-user.com/2014/05/what-is-a-gamut-or-color-space-and-why-do-i-need-to-know-about-it/

 

In video terms gamut is normally related to as the full range of colours and brightness that can be either captured or displayed.

 

Generally speaking all color gamuts recommendations are trying to define a reasonable level of color representation based on available technology and hardware. REC-601 represents the old TVs. REC-709 is currently the most distributed solution. P3 is mainly available in movie theaters and is now being adopted in some of the best new 4K HDR TVs. Rec2020 (a wider space than P3 that improves on visibke color representation) and ACES (the full coverage of visible color) are other common standards which see major hardware development these days.

 

 

To compare and visualize different solution (across video and printing solutions), most developers use the CIE color model chart as a reference.
The CIE color model is a color space model created by the International Commission on Illumination known as the Commission Internationale de l’Elcairage (CIE) in 1931. It is also known as the CIE XYZ color space or the CIE 1931 XYZ color space.
This chart represents the first defined quantitative link between distributions of wavelengths in the electromagnetic visible spectrum, and physiologically perceived colors in human color vision. Or basically, the range of color a typical human eye can perceive through visible light.

 

Note that while the human perception is quite wide, and generally speaking biased towards greens (we are apes after all), the amount of colors available through nature, generated through light reflection, tend to be a much smaller section. This is defined by the Pointer’s Chart.

 

In short. Color gamut is a representation of color coverage, used to describe data stored in images against available hardware and viewer technologies.

 

Camera color encoding from
https://www.slideshare.net/hpduiker/acescg-a-common-color-encoding-for-visual-effects-applications

 

CIE 1976

http://bernardsmith.eu/computatrum/scan_and_restore_archive_and_print/scanning/

 

https://store.yujiintl.com/blogs/high-cri-led/understanding-cie1931-and-cie-1976

 

The CIE 1931 standard has been replaced by a CIE 1976 standard. Below we can see the significance of this.

 

People have observed that the biggest issue with CIE 1931 is the lack of uniformity with chromaticity, the three dimension color space in rectangular coordinates is not visually uniformed.

 

The CIE 1976 (also called CIELUV) was created by the CIE in 1976. It was put forward in an attempt to provide a more uniform color spacing than CIE 1931 for colors at approximately the same luminance

 

The CIE 1976 standard colour space is more linear and variations in perceived colour between different people has also been reduced. The disproportionately large green-turquoise area in CIE 1931, which cannot be generated with existing computer screens, has been reduced.

 

If we move from CIE 1931 to the CIE 1976 standard colour space we can see that the improvements made in the gamut for the “new” iPad screen (as compared to the “old” iPad 2) are more evident in the CIE 1976 colour space than in the CIE 1931 colour space, particularly in the blues from aqua to deep blue.

 

 

https://dot-color.com/2012/08/14/color-space-confusion/

Despite its age, CIE 1931, named for the year of its adoption, remains a well-worn and familiar shorthand throughout the display industry. CIE 1931 is the primary language of customers. When a customer says that their current display “can do 72% of NTSC,” they implicitly mean 72% of NTSC 1953 color gamut as mapped against CIE 1931.

https://www.yobi3d.com/#!/

http://www.theverge.com/2014/8/8/5982355/yobi3d-is-a-search-engine-for-3d-models

http://3dprintingindustry.com/2016/01/13/64787/

http://www.fabbaloo.com/blog/2015/12/20/yobi3d-makes-searching-for-3d-models-a-lot-more-fun

http://www.3ders.org//articles/20140809-yobi3d-is-google-for-all-3d-printable-models.html

http://www.yeggi.com/

http://www.wikilectures.eu/index.php/Spectral_sensitivity_of_the_human_eye

 

http://www.normankoren.com/Human_spectral_sensitivity_small.jpg

 

Spectral sensitivity of eye is influenced by light intensity. And the light intensity determines the level of activity of cones cell and rod cell. This is the main characteristic of human vision. Sensitivity to individual colors, in other words, wavelengths of the light spectrum, is explained by the RGB (red-green-blue) theory. This theory assumed that there are three kinds of cones. It’s selectively sensitive to red (700-630 nm), green (560-500 nm), and blue (490-450 nm) light. And their mutual interaction allow to perceive all colors of the spectrum.

 

http://weeklysciencequiz.blogspot.com/2013/01/violet-skies-are-for-birds.html

 

 

Sensitivity of human eye Sensitivity of human eyes to light increase with the decrease in light intensity. In day-light condition, the cones cell is responding to this condition. And the eye is most sensitive at 555 nm. In darkness condition, the rod cell is responding to this condition. And the eye is most sensitive at 507 nm.

 

As light intensity decreases, cone function changes more effective way. And when decrease the light intensity, it prompt to accumulation of rhodopsin. Furthermore, in activates rods, it allow to respond to stimuli of light in much lower intensity.

 

https://www.nde-ed.org/EducationResources/CommunityCollege/PenetrantTest/Introduction/lightresponse.htm

The three curves in the figure above shows the normalized response of an average human eye to various amounts of ambient light. The shift in sensitivity occurs because two types of photoreceptors called cones and rods are responsible for the eye’s response to light. The curve on the right shows the eye’s response under normal lighting conditions and this is called the photopic response. The cones respond to light under these conditions.

 

As mentioned previously, cones are composed of three different photo pigments that enable color perception. This curve peaks at 555 nanometers, which means that under normal lighting conditions, the eye is most sensitive to a yellowish-green color. When the light levels drop to near total darkness, the response of the eye changes significantly as shown by the scotopic response curve on the left. At this level of light, the rods are most active and the human eye is more sensitive to the light present, and less sensitive to the range of color. Rods are highly sensitive to light but are comprised of a single photo pigment, which accounts for the loss in ability to discriminate color. At this very low light level, sensitivity to blue, violet, and ultraviolet is increased, but sensitivity to yellow and red is reduced. The heavier curve in the middle represents the eye’s response at the ambient light level found in a typical inspection booth. This curve peaks at 550 nanometers, which means the eye is most sensitive to yellowish-green color at this light level. Fluorescent penetrant inspection materials are designed to fluoresce at around 550 nanometers to produce optimal sensitivity under dim lighting conditions.

 

http://iosres.com/

http://matadornetwork.com/pulse/12-views-new-zealand-locals-rather-keep/

http://www.universetoday.com/123243/new-visualization-shows-incredible-variety-of-extraterrestrial-worlds/

According to NASA’s Exoplanet Archive website, 1,903 extra solar have been discovered since 1988 as of October 22, 2015.