"The second question is unanswerable unless you happen to know exactly how many people carry lighters and are likely to wave them around". Add to that the fact that the flame from each lighter may have a different brightness, just as stars may differ in brightness and planets may differ in size.
It could use this concept to indicate whether two completely unfamiliar visual stimuli were the same or different, irrespective of the dimension in which they differed (shape, brightness, pattern) (Scholtyssek et al. 2013).
That study demonstrated that the seal could use this concept to judge whether completely unfamiliar stimuli were same or different irrespective of the dimension in which they differed (shape, brightness, or pattern).
At the moment, however, FIRST cannot resolve objects that differ in brightness by more than 50-100 times.
A top-hat is a residual filter that preserves those features in an image that can fit within the structuring element and removes those that cannot; in other words, the top-hat transform is used to segment objects that differ in brightness from the surrounding background in images with uneven background intensity.
The morphological top-hat transform is used to enhance ROI images, with the aim of detecting objects that differ in brightness from the surrounding background; in our case, it was used to increase the contrast between the MCs and the background.
Pupil dilation the cinching and uncinching of the muscle around the iris is manipulated with a white L.E.D., shone into the eye at differing degrees of brightness.
Pupil dilation — the cinching and uncinching of the muscle around the iris — is manipulated with a white L.E.D., shone into the eye at differing degrees of brightness.
The hepatocytes formed two distinct populations differing in GFP brightness.
This is important, because elements in a visual scene can differ strongly in brightness: Your keyboard might be dark, whereas your monitor might be bright.
