DIS Image Processing & Enhancement 3

Question 1

Which color adjustment tool in image editing maps specific input tonal values to desired output values using a custom curve?

Accepted Answer

Curves

Answer

The Curves tool allows precise mapping of input tonal values to output values across the full tonal range, offering fine control over contrast and color.

Question 2

In image processing, morphological dilation of a binary image will:

Accepted Answer

Expand foreground objects by adding pixels at boundaries

Answer

Dilation adds pixels to the boundaries of foreground objects using a structuring element, expanding their size and filling small gaps.

Question 3

What does the 'Threshold' slider in an unsharp mask filter do?

Accepted Answer

Defines how different a pixel must be from its surroundings before sharpening is applied

Answer

The threshold value prevents sharpening of pixels whose tonal difference from neighbors is smaller than the specified value, protecting smooth areas like skin from over-sharpening.

Question 4

Which demosaicing algorithm produces the highest quality output from a Bayer pattern RAW file but requires the most processing time?

Accepted Answer

AHD (Adaptive Homogeneity-Directed) demosaicing

Answer

AHD demosaicing adaptively selects the best interpolation direction for each pixel, producing superior edge detail and color accuracy at the cost of higher computational demand.

Question 5

A 'luminosity mask' in advanced compositing selects pixels based on:

Accepted Answer

Their brightness values relative to the tonal range

Answer

Luminosity masks create selections weighted by pixel brightness, allowing edits to be applied with natural feathering that respects the tonal values in the image.

(DIS) Digital Imaging Specialist Certification Practice Test

(DIS) Digital Imaging Specialist Certification Practice Test

DIS Image Processing & Enhancement 3