Furthermore, Phillips says, "changes in illumination have adversely affected face-recognition performance from still images.
Most of the invariants need changes in illumination or object position between image acquisitions.
Try to avoid sudden changes in illumination, like having the person go from a brightly lit room to a dark one.
But the shape of a face isn't affected by changes in illumination". Hence, 3-D face recognition might even be used in near-dark conditions.
Second, it enables robust tracking even in the face of sudden and gradual changes in illumination, scale and viewpoint.
Retinal input is riddled with abrupt transients due to self-motion, changes in illumination, object-motion, etc.
The challenge is to resolve salient features of the time series while eliminating noise introduced by ephemeral changes in illumination, phenology, atmospheric condition, and geometric registration.
This allowed them to explore how the clock responds to factors such as changes in illumination patterns and to genetic mutations, a factor that effects how the clock might change over evolutionary time scales.
Recognition can be performed in near real-time and accounts for complexity such as changes in illumination, occlusions, blurring and moving objects.
Motivated by perceptual principles, we derive a new color space in which the associated metric approximates perceived distances and color displacements capture relationships that are robust to spectral changes in illumination.
Experimental results show that the proposed face tracking system is very robust in its ability to handle occlusion, noise, scene clutter and changes in illumination, scale and viewpoint and is also computationally efficient.
