A wide gamut display achieves its extended range chiefly by
Answer: A
Purer primaries lie further out on the chromaticity diagram and enclose more area. Quantum dot and laser backlights both work in exactly this way. Purer primaries enclose a larger triangle. Brightness plays no part in the gamut.
Please log in or register to report this question.
Assertion (A): Increasing display brightness does not by itself widen the gamut.
Reason (R): Gamut is bounded by the chromaticities of the primaries rather than their intensity.
Answer: B
Correct answer: Both A and R are true, and R is the correct explanation of A
Both are true and the reason gives the mechanism. The gamut in the chromaticity diagram is the triangle whose vertices are the primaries, and scaling all three intensities together moves the white point up in luminance without moving any vertex. A wider gamut needs more saturated primaries, not brighter ones.
Please log in or register to report this question.
The sRGB colour space was defined to
Answer: C
It became the default assumption for untagged images on the web. Its gamut is notably smaller than modern wide gamut displays can achieve. It became the default for untagged web images. Its gamut is modest by modern standards.
Please log in or register to report this question.
Match each colour space with its characteristic.
List I
A. sRGB
B. Adobe RGB
C. ProPhoto RGB
D. CMYK
List II
1. a very wide gamut with imaginary primaries
2. a modest gamut matched to older displays
3. a device dependent subtractive printing space
4. a wider gamut reaching further into the greens
Answer: D
Each was defined for a different purpose and none is universally correct. Working in too wide a space at low bit depth risks visible banding. Each space was defined for a different purpose. None of them is universally correct.
Please log in or register to report this question.
Assertion (A): Working in a very wide gamut space at eight bits risks visible banding.
Reason (R): The same number of code values must span a much larger range of colours.
Answer: A
Both are true and the reason gives the mechanism, and sixteen bit working avoids it. Gamut width and bit depth must be chosen together. Sixteen bit working avoids the problem entirely. Range and precision must be matched.
Please log in or register to report this question.
Consider the following statements about colour space selection.
1. A wider gamut space needs greater bit depth to avoid banding.
2. sRGB remains the safe default for untagged web images.
3. The widest available gamut is always the best working choice.
Answer: B
Correct answer: 1 and 2 only
Statements 1 and 2 are correct: spreading the same number of code values over a wider range makes each step larger and banding more likely, and sRGB remains the safe assumption for an untagged image. Statement 3 ignores both of those - a wide gamut is a liability without the bit depth to support it and a workflow that carries the profile.
Please log in or register to report this question.
Colour separation for printing converts
Answer: C
The conversion depends on the inks, the paper and the press together. It is the point at which the reproduction becomes device dependent. Inks, paper and press all enter the conversion. Separation is where device dependence enters.
Please log in or register to report this question.
Under colour removal and grey component replacement both
Answer: D
Where all three chromatic inks overlap they produce a grey that black can supply instead. Ink cost, drying and registration all improve as a result. Black replaces the overlapping grey component. Cost and registration both improve.
Please log in or register to report this question.
Assertion (A): Grey component replacement improves the stability of a print run.
Reason (R): Replacing three overlapping inks with black reduces sensitivity to registration error.
Answer: A
Correct answer: Both A and R are true, and R is the correct explanation of A
Both are true and the reason gives the mechanism. Where cyan, magenta and yellow would all be laid down, the common grey component is replaced by black. Three overlapping inks become one, so a small misregistration no longer shifts the colour, and the total ink laid on the sheet falls with it.
Please log in or register to report this question.
Consider the following statements about grey component replacement.
1. It substitutes black for the grey component of three inks.
2. It reduces ink use and improves registration tolerance.
3. It always improves the appearance of dark saturated colours.
Answer: B
Correct answer: 1 and 2 only
Statements 1 and 2 describe grey component replacement correctly. Statement 3 claims too much: replacing chromatic ink with black can flatten the darkest saturated colours, since black contributes no chroma. This is why the amount of replacement is a setting to be judged rather than a switch to be turned fully on.
Please log in or register to report this question.
