07. Discrete wavelength models sensors - 2011

07. Discrete wavelength models sensors - 2011 - ECE 638:...

Info iconThis preview shows pages 1–7. Sign up to view the full content.

View Full Document Right Arrow Icon
ECE 638: Principles of Digital Color Imaging Systems Lecture 7: Discrete Wavelength Models Sensors
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Synopsis Discretization of model Sensor subspace Decomposition of stimulus into fundamental and nullspace components Graphical interpretation
Background image of page 2
Why discretize the model? So far we have assumed that is continuous Upside of this assumption matches real world Downside of this assumption for computation, we must discretize the model we can gain further intuition if we descretize the model 400 nm ≤ λ ≤ 700 nm
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Discretization of wavelength It is common practice to make the following choices: This implies that we need samples to characterize the visible spectrum. M = 31 λ k = ( k 1) Δλ + min , k = 1, , M min = 1 = 400 nm max = M = 700 nm Δλ = 10 nm
Background image of page 4
Notation This material is taken from the paper by Mark Wolski: “A review of linear color descriptor spaces and their applications,” which is available for download at the course website. Wolski’s notation differs somewhat from that used thus far to describe the continuous-wavelength trichromatic model. For ease of cross-reference between the lecture notes and Wolski’s paper, we will follow his notation here.
Background image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Discrete-wavelength trichomatic model Stimulus
Background image of page 6
Image of page 7
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 19

07. Discrete wavelength models sensors - 2011 - ECE 638:...

This preview shows document pages 1 - 7. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online