ACE Color Correction and Management 3 — Questions and Answers
Question 1: In the Lab color mode, which channel exclusively controls lightness independent of color?
- a channel
- b channel
- L channel (Correct answer)
- K channel
Correct answer: L channel
The L (Luminosity) channel in Lab mode stores only brightness information, completely separate from the a and b color channels.
Question 2: What adjustment layer would you use to shift a specific range of hues without affecting others?
- Color Balance
- Hue/Saturation with targeted color range (Correct answer)
- Vibrance
- Photo Filter
Correct answer: Hue/Saturation with targeted color range
Hue/Saturation allows you to select a specific color range (Reds, Yellows, etc.) and shift only that range's hue independently.
Question 3: Which panel shows a live tonal distribution of your image's highlights, midtones, and shadows?
- Layers panel
- Histogram panel (Correct answer)
- Properties panel
- Channels panel
Correct answer: Histogram panel
The Histogram panel displays a real-time graph of pixel distribution across the tonal range for the current document.
Question 4: You see a warning triangle in Photoshop's Color Picker. What does this indicate?
- The color is outside the web-safe palette
- The color is out of the printable CMYK gamut (Correct answer)
- The color exceeds Lab gamut boundaries
- The color has been previously sampled
Correct answer: The color is out of the printable CMYK gamut
The gamut warning triangle in Color Picker alerts you that the selected color cannot be reproduced in the current CMYK output color space.
Question 5: When correcting a blue color cast in shadows using the Color Balance adjustment, which slider should you move and in which direction?
- Yellow–Blue slider toward Yellow (Correct answer)
- Cyan–Red slider toward Red
- Magenta–Green slider toward Green
- Yellow–Blue slider toward Blue
Correct answer: Yellow–Blue slider toward Yellow
Moving the Yellow–Blue slider toward Yellow in the Shadows tone balance subtracts blue from dark areas, neutralizing a blue cast.
Question 6: Which Camera Raw / Lightroom panel control is equivalent to a targeted midtone brightness adjustment in Curves?
- Blacks slider
- Exposure slider (Correct answer)
- Shadows slider
- Gamma slider
Correct answer: Exposure slider
The Exposure slider in Camera Raw acts as an overall brightness/midtone control, similar to moving the midpoint of the Curves adjustment.
Question 7: Soft proofing in Photoshop simulates how an image will look when:
- Viewed on a calibrated monitor
- Printed or displayed on a device with a specific ICC profile (Correct answer)
- Converted to 8-bit from 16-bit
- Uploaded to a web server
Correct answer: Printed or displayed on a device with a specific ICC profile
Soft proofing uses an output device's ICC profile to simulate how the image will appear when reproduced on that device.
ACE Color Correction and Management 3
In the Lab color mode, which channel exclusively controls lightness independent of color?