The Art, Science and Algorithms
- f Photography
Lenses & Depth of Field (DOF) Optics I CSCI 4900/6900 Maria Hybinette
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- General topic for next couple of weeks
- Cameras: Pinhole Camera and Optics
– Rays of Scene to pixels – Camera without optics – Lens in the camera system – The Lens Equation
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Cameras captures Rays of Light à Get it ta a sensor { Film or Digital} and that creates a photograph
Camera & Rays of Light
- Recall: Context of Computational
Photography
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Slide: Irfan Essa
- How we capture a 3D
scene into 2D array of pixels
- Rays are fundamental
primitives
- Illumination (Light Rays)
follows a path from the source to the scene
– Geometry to extract information of the scene
- Computation can
control the parameters
- f the optics, sensor and
illumination
- Rays to Pixels
History-Science-Art of the Camera
- Mathematicians, scientists (or artists
deeply scientifically motivated) have been the key pushers of the advancement of the camera
- Idea has been around about the 4th, 5th
and 6th Century B.C. (‘aperture’)
– Chines philosopher Mo-Ti “the collecting plate”, “locked treasure room”; – Aristotle & Euclid’s ‘Optica’ talked about a pinhole camera, or the camera obscura) – Byzantine mathematician Anthemius of Tralles used a type of camera obscura in his
- experiments. 6th
4 Maria Hybinette
h@p://en.wikipedia.org/wiki/History_of_photography h@p://www.moGobscura.com/moG_about.html
Camera = Vaulted room Obscura = Dark Camera Obscura = Darkroom
Camera Obscura (pinhole camera)
Maria Hybinette 5
- Abu Ali al-Haytham, mathematician
(around 1000 AD)
v Lights streams of particles travel in
straight lines
- Johannes Kepler (“Astronomiae Pars
Optica” (1604))
v Corrected theory on how camera
- bscura operated
v Inverse square laws of light v Astronomical laws v Human optics v Later “Dioptrice“1611- telescope
h@p://en.wikipedia.org/wiki/Johannes_Kepler
Maria Hybinette 6
h@p://arts.jrank.org/pages/9526/Camera-obscura.html