DIS Image Acquisition & Capture 3

Question 1

In a RAW file workflow, which step converts linear light data captured by the sensor into a perceptually uniform image?

Accepted Answer

Gamma encoding / tone curve application

Answer

Gamma encoding (e.g., applying a gamma of ~2.2) redistributes linear sensor data so that midtone gradations appear visually smooth to human perception.

Question 2

A lens's 'maximum magnification ratio' of 1:1 means:

Accepted Answer

The subject is reproduced at life-size on the sensor

Answer

A 1:1 magnification ratio means the image of the subject projected onto the sensor is the same physical size as the subject itself.

Question 3

What is 'pixel binning' used for in digital cameras?

Accepted Answer

Combining adjacent pixels to improve low-light sensitivity at reduced resolution

Answer

Pixel binning groups neighboring photosites and sums or averages their signals, boosting effective sensitivity while reducing resolution and noise.

Question 4

When using a polarizing filter for outdoor photography, maximum polarization effect is achieved when the camera is pointed:

Accepted Answer

At a 90-degree angle to the sun

Answer

A linear or circular polarizing filter has maximum effect when the subject is at approximately 90° to the sun, cutting reflected glare and deepening sky blues.

Question 5

HDR (High Dynamic Range) image capture typically involves:

Accepted Answer

Merging multiple exposures taken at different shutter speeds or exposure values

Answer

HDR merges bracketed exposures—typically 3 to 7 frames at different EVs—to retain detail in both shadows and highlights beyond a single exposure's range.

(DIS) Digital Imaging Specialist Certification Practice Test

(DIS) Digital Imaging Specialist Certification Practice Test

DIS Image Acquisition & Capture 3