HP: Νέα οθόνη Dreamcolor με δυνατότητα απεικόνισης 1δις. χρωμάτων στα $599

[Odyss3us]

ενα απο τα ευχαριστα του ινσομνια...  να διαβαζω ποστ απο ανηλικα χιπστερς να κραζουν το καθετι αγνωστο που απλα απεχει απο το  γνωστο τους συμπαν και μικροκοσμο τους που δεν ειναι αλλο απο το wannabe hardware  που τρεχει σε fullhd το αγαπημενο τους παιχνιδι σε full detail msaa fxaa triple buffer κλπ σε 60 frames ακατεβατα..

[21century]

Επιτέλους ανεβαίνουν τρομερά οι αναλύσεις..

[michael92]

Άχρηστο... Αν δεν έχει κάποια ειδική χρήση είναι καθαρά κόλπο μαρκετινγκ, αφού οι άνθρωποι μπορούν να ξεχωρίσουν μόνο λίγα εκατομμύρια χρώμματα... Μόνο κάτι πεταλούδες, περιστέρια, γαρίδες και λίγα ακόμη ζώα βλέπουν περισσότερα χρώμματα, αλλά δε φαντάζομαι η οθόνη να απευθύνεται σε αυτά...

 

[kissMA]

Ωραίο ακούγεται αλλά στην πράξη είναι απλά μαρκετίστικο. Ο αριθμός των χρωμάτων είναι μόνο ενα κομμάτι της απεικόνισης. Πρώτα απ όλα υπάρχουν ενα σωρό άλλα πράγματα (ομοιομορφία, contrast, coating κλπ). Μετά πρέπει να τη ρυθμίσεις σωστά (μόνο επαγγελματίες έχουν το πανάκριβο κατάλληλο hardware).

[The_Colonel]

Μπορουμε να ξεχωρισουμε 1 δις χρωματα?

Μωρε μπραβο...

 H σύντομη απάντηση ... ναι... (για φωτογράφους κτλ προορίζονται τα συγκεκριμένα μοντέλα. )

 

Η πιο λεπτομερής απάντηση :

 

 

 

CIE, which began in the 1930's, and progressed again in the 1960's, with some algorithmic and accuracy improvements to formula over the last couple decades. When it comes to the arts, including photography and print, I think that the work done by the CIE is particularly relevant, as it is the basis of color correction and modern mathematical color models and color space conversion.

The CIE, or Commission internationale de l'éclairage, in 1931 established the "CIE 1931 XYZ color space". This color space was a plot of full purity color, mapped from 700nm (near-infrared red) through 380nm (near-UV), and progressed through all the wavelengths of "visible" light. This color space is based on human vision, which is a tri-stimulus created by the three types of cones in our eyes: short, medium and long wavelength cones, which map to 420-440nm, 530-540nm, and 560-580nm wavelengths. These wavelengths correspond to blue, green, and yellow-red (or orangish-red) primary colors. (The red cones are a bit unique, in that their sensitivity has two peaks, the primary one in the 560-580nm range, and also a second one in the 410-440nm range. This double peaked sensitivity indicates that our "red" cones may actually be "magenta" cones in terms of actual sensitivity.) The tristimulus response curves are derived from a 2° field of view of the fovea, where our cones are most concentrated and our color vision, under medium to high lighting intensity, is at its greatest.

The actual CIE 1931 color space is mapped from XYZ tristimulus values, which are generated from red, green, and blue derivatives, which are based on actual red, green, and blue color values (additive model.) The XYZ tristimulus values are adjusted for a "standard illuminant", which is normally a sunlight balanced white of 6500K (although the original CIE 1931 color space was created for three standardized illuminants A 2856K, B 4874K and C 6774K), and weighted according to a "standard observer" (based on that 2° foveal field of view.) The standard CIE 1931 XYZ color plot is horshoe-shaped and filled with a "chromaticity" diagram of pure 'colors', covering the hue range from 700nm through 380nm, and ranging in saturation from 0% centered at the white point to 100% along the periphery. This is a "chromaticity" plot, or color without regard to intensity (or color at maximum intensity, to be most accurate.) This color plot, according to some studies (references pending), represents about 2.38 million colors that the human eye can detect under moderately high intensity lighting approximately the same color temperature and brightness of daylight (not sunlight, which is closer to 5000k, but sunlight + blue sky light, about 6500k.)

So, can the human eye detect only 2.4 million colors? According to the work done by the CIE in the 1930's, under a specific illuminant that equates to the intensity and color temperature of daylight, when factoring in only the 2° of cones concentrated in the fovea of our eyes, then it seems we can indeed see 2.4 million colors.

The CIE specifications are limited in scope, however. They do not account for varying levels of illumination, illuminants of differing intensity or color temperature, or the fact that we have more cones spread across at least a 10° area of our retinas around the fovea. They also do not account for the fact that peripheral cones seem to be more sensitive to blues than the cones concentrated in the fovea (which are primarily red and green cones).

Refinements to the CIE chromaticity plots were made in the '60's and again in 1976, which refined the "standard observer" to include a full 10° color sensitive spot in our retinas. These refinements to CIE's standards have never come into much use, and the extensive color sensitivity research that has been done in relation to CIE's work has been largely limited to the original CIE 1931 XYZ color space and chromaticity plot.

Given the limitation of color sensitivity to only a 2° spot in the fovea, there is a strong likelihood that we can see more than 2.4 million colors, particularly extending into the blues and violets. This is corroborated by the1960's refinements to CIE color spaces.

Tone, perhaps better labeled luminosity (the brightness or intensity of a color), is another aspect of our vision. Some models blend chromaticity and luminosity together, while others distinctly separate the two. The human eye contains a retina composed of both cones..."color" sensitive devices, as well as rods, which are color-agnostic but sensitive to changes in luminosity. The human eye has about 20 times as many rods (94 million) as it does cones (4.5 million). Rods are also about 100 times as sensitive to light as cones, capable of detecting a single photon. Rods seem to be most sensitive to the blueish-green wavelengths of light (around 500nm), and have lower sensitivities to reddish and near-UV wavelengths. It should be noted that a rods sensitivity is cumulative, so the longer one observes a static scene, the clearer the levels of luminosity in that scene will be perceived by the mind. Rapid changes in a scene, or panning motion, will reduce the ability to differentiate fine tonal gradation.

Given the rod's far greater sensitivity to light, it seems logical to conclude that humans have a finer, and distinct, sensitivity to variations in light intensity than they do to changes in hue and saturation when one observes a static scene for a time. Exactly how this factors into our perception of color and how it affects the number of colors we can see, I can't exactly say. A simple test of tonal sensitivity can be done on a clear day's evening, just as the sun sets. The blue sky can range from near white-blue to deep dark midnight blue. While the hue of such a sky covers a very small range, the tonal grade is immense and very fine. Observing such a sky, one can see an infinitely smooth change from bright white-blue to sky blue to dark midnight blue.

Studies unrelated to CIE work have indicated a wide range of "maximum colors" that the human eye can perceive. Some have an upper limit of 1 million colors, while others have an upper limit of 10 million colors. More recent studies have shown that some women have a unique fourth cone type, an "orange" cone, that could possibly extend their sensitivity to 100 million, however that study counted both chromaticity andluminosity in their calculation of "color".

That ultimately begs the question, can we separate chromaticity from luminosity when determining "color"? Do we prefer to define the term "color" to mean the hue, saturation, and luminosity of the light we perceive? Or is it better to separate the two, keep chromaticity distinct from luminosity? How many levels of intensity can the eye really see, vs. how many distinct differences in chromaticity? I am not sure these questions have actually been answered in a scientific way yet.

Another aspect of color perception involves contrast. It is easy to perceive a difference in two things when they contrast well with each other. When trying to visually determine how many "colors" one sees when looking at varying shades of red, it can be rather difficult to tell if two similar shades are different or not. However, compare a shade of red with a shade of green, and the difference is very clear. Compare that shade of green in sequence with each shade of red, and the eye can more easily pick up the differences in the red shades in peripheral relation to each other as well as in contrast with the green. These factors are all facets of the vision of our mind, which is a far more subjective device than the eye itself (which makes it hard to scientifically gauge color perception beyond the scope of the eye itself.) Given a setting with appropriate contrast, one may be able to detect far more distinct colors in context than a setting without any contrast at all. 

 

[The_Colonel]

Διορθώσεις στο άρθρο:

Z24x: ανάλυση 1920*1200p

 

Z27x: 27 ιντσών, 100% AdobeRGB  και 99% DCI-P3

 

Συμπληρωματικά

Z24x: IPS pannel, γωνία θέασης 178^ο, 60Ηz, τυπικό contrast 1000:1, latency 20ms και 6ms GtG,ρόνος ζωής λάμπας 30000 minimum

Z27x: IPS pannel, γωνία θέασης 178^ο,60 - 50 -40 Ηz native, ελάχιστο τυπικό κοντράστ 800:1, τυπική απόκριση GtG 12ms, χρόνος ζωής λάμπας 50000 minimum

 

 

Και οι 2 οθόνες έχουν one button πρόσβαση σε αρκετά (εργοστασιακά προ καλιμπραρισμένων) χρωματικά πρότυπα εκ των οποίων ειναι και τα sRGB D65, sRGB D50, Adobe RGB, BT.709, BT.2020 and DCI-P3

 

Επίσης παρέχουν δυνατότητα δημιουργίας εξατομικευμένης παλέτας χρωμάτων παρέχοντας δυνατότητα ρύθμισης της τονικής καμπύλης των χρωμάτων (tone response), των πρωτευόντων/βασικών χρωμάτων (primaries), καθώς και ρύθμισή του λευκού (white point)

Επίσης παρέχουν συνεχόμενη και πιστή αναπαραγωγή 10bit σήματος.

Αποτελούν το αποτέλεσμα της συνεργασίας HP και DreamWorks Animation SKG Inc καθώς και άλλων μεγάλων στούντιο αλλά και χρηστών και στόχο έχει την πιστή αναπαραγωγή του αποτελέσματος στο post production και την μεγάλη οθόνη.

[jimakos1981]

Ένα δις....ωραία... το μάτι μας ξεχωρίζει 45.000 χρώματα. Μπράβο στα κόλπα του μάρκετινγκ που μετατρέπει τις πατάτες σε αγγούρια.

[Thresh]

Σε λίγο θα γράψει κάποιος για καμιά 10αρια χρώματα...