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LATEST POSTS
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Tracing Spherical harmonics and how Weta used them in production
A way to approximate complex lighting in ultra realistic renders.
All SH lighting techniques involve replacing parts of standard lighting equations with spherical functions that have been projected into frequency space using the spherical harmonics as a basis.
http://www.cs.columbia.edu/~cs4162/slides/spherical-harmonic-lighting.pdf
Spherical harmonics as used at Weta Digital
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The illusion of sex 2009
Richard Russell Harvard University, USA
In the Illusion of Sex, two faces are perceived as male and female.
However, both faces are actually versions of the same androgynous face.
One face was created by increasing the contrast of the androgynous face, while the other face was created by decreasing the contrast. The face with more contrast is perceived as female, while the face with less contrast is perceived as male. The Illusion of Sex demonstrates that contrast is an important cue for perceiving the sex of a face, with greater contrast appearing feminine, and lesser contrast appearing masculine.
Russell, R. (2009) A sex difference in facial pigmentation and its exaggeration by cosmetics. Perception, (38)1211-1219.
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FEATURED POSTS
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Back Button Focus advantages
http://thephotographerwithin.com/2015/05/back-button-focus/
What are the advantages of BBF?
Faster shooting with static subjects: you can lock focus with the AF-ON button once then let go of the button for subjects that don’t move. Great for landscapes, macro, even sleepy newborns. No need to refocus every time you press the shutter.
Easier to focus and recompose: you can lock focus using your center focal point with the AF-ON button then let go of the button and recompose your image very easily without having to re-do your focus each and every time you press the shutter. Useful for Canon cameras with limited focal points or if your initial composition isn’t optimal.
Better focus for moving subjects: you can shoot continuously with the AF-ON button depressed and your focus will track your moving subject.
Override and fine-tune autofocus: you can ensure tack sharp images when using Live View and zooming your focal point in to 100%, then locking in that focus by using the AF-ON button. You can even adjust your focus manually by turning your focus ring on the lens without turning the switch to MF on the front of the camera (if required).
And finally, and this is the HUGEST advantage I’ve found, you never, ever need to change your auto focus mode again. Setting it to AF-C/AI Servo AF and using BBF allows you to access all of the focus modes with this one button. BBF eliminates the need for switching focus modes between AF-S/One Shot, AF-C/AI Servo, and AF-Auto. BBF makes AF-C/AI Servo AF usable for both moving and stationary subjects. Wow, right?!
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Mike Wong – AtoMeow – A Blue noise image stippling in Processing
https://github.com/mwkm/atoMeow
https://www.shadertoy.com/view/7s3XzX
This demo is created for coders who are familiar with this awesome creative coding platform. You may quickly modify the code to work for video or to stipple your own Procssing drawings by turning them into
PImageand run the simulation. This demo code also serves as a reference implementation of my article Blue noise sampling using an N-body simulation-based method. If you are interested in 2.5D, you may mod the code to achieve what I discussed in this artist friendly article.Convert your video to a dotted noise.