By Brand Fortner
Numbering with shades is educational in nature, with many useful examples given in the course of the presentation. it truly is seriously illustrated with gray-scale pictures, but additionally integrated is an 8-page signature of 4-color illustrations to aid the presentation. whereas the association is just a little just like that present in "The facts Handbook," there's little overlap with the content in that book. the 1st part within the booklet discusses colour Physics, body structure and Psychology, speaking concerning the information of the attention, the visible pathway, and the way the mind converts colours into perceptions of colorations. this is often via the second one part, during which colour applied sciences are defined, i.e. how we describe colours utilizing the CIE diagram, and the way colours could be reproduced utilizing a variety of applied sciences resembling offset printing and video monitors. The 3rd portion of the booklet, utilizing colours, relates how scientists and engineers can use colour to assist achieve perception into their info units via real colour, fake colour, and pseudocolor imaging.
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Additional resources for Number by Colors: A Guide to Using Color to Understand Technical Data
Clearly, the blue signal is "boosted" somehow in the visual pathway. 12 is known much more accurately than the heights of each of the curves relative to each other. To state it another way, we do not know the normalization of these curves. This is why we have ignored the relative heights completely, and scaled each so they all peak at the same height. The Visual Pathway and the Lateral Geniculate Nucleus Although we observe light spectra with red, green, and blue sensitive cones, we certainly do not talk about colors in terms of the amount of red, green, and blue light coming from an object.
9. 10 shows the density of rods and cones as a function of distance from the fovea. Note how sharply the number of cones peaks in the fovea, and how there are virtually no rods there. 10 11 . 9. Nonuniform versus uniform spacing of sensors. Our eye has a highly nonuniform sensor spacing. f: x x· Uniform Sensor Spacing • ~. '" Nonuniform Sensor Spacing 9. More precisely, in the primary visual cortex region at the back of our cerebral cortex. 10. For Charge Coupled Detector, an integrated circuit containing a matrix of thousands or millions of tiny detectors.
The thumb experiment mentioned previously is one example of this filling in. A photosensor is activated when a chemical known as a photopigment absorbs a photon, and through a complicated process generates an electrical nerve impulse signal. Photopigments are sensitive to only particular frequencies of photons, and not to others. Rods and the three kinds of cones each use a different photoreceptor, and so are sensitive to different photon frequencies. This selective sensitivity to photons is the key to color vision.
Number by Colors: A Guide to Using Color to Understand Technical Data by Brand Fortner
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