SLIDE 1
The Art, Science and Algorithms
- f Photography!
(Natural) Light! Direction of Light! CSCI 4900/6900! Maria Hybinette!
1!
- Today: Light, composition so we can lead
into our workshop on Thursday using DIY “Light finders”!
- Focus today: Lighting angles &
composition same principle for both natural and artificial light (Chugh Garner nova.org)!
– Reflector as fill light (lower strength light source)!
2!
What makes ‘good’ light?!
- Soft and Hard Light:!
– What does this mean?!
- Creating objects so they look 3D as we see it,
remembers the scene, and not the camera’s 2D & flat. !
- Why is this hard?!
– We see in 3D, and we need to create a 3D illusion.!
3!
What makes things look 3D?!
- We use three primary cues (there are others)!
– Stereo Vision: !
- We use stereo and that works only for 10 feet, if we need stereo
at larger distances we need our eyes to be further apart.!
– Occlusion: !
- Other reference subject occlude other subjects!
- E.g., I know the tale is further away because you occlude this!
– Parallax: !
- Move your head side to side and watch a subject and its
- background. Things that are closer appear to move more than
things that are further away.!
– Other 3D Cues: Geometry/perspective, if you know the size of an object and see it as a distance you have an idea how far away it is.!
4!
Natural vs. Flattering Lighting.!
- Outdoor natural light:!
– direction of the light is from high angles (most of the day time) ! – Characteristics: Brow shades the eye socket!
- Other ‘Raccoon Eyes’
Culprits: Sky Lights, indoor ceiling lights.!
5!
Avoiding Raccoon Eyes!
- Change the direction of the light:
Move the chin up, to lighten up the eye
- sockets. Bounce light, e.g., alleys!
- Soften (Fill): Shot into the sun – and use
fill light - light up the face with artificial light, sun creates rim light.!
6!