Single pixel operations

Question 1

Log transformation is not tunable
True or False

Answer 1

True.
Log transformation– Highlight the differences among pixels in given
conditions

Gamma transformation– Similar to log, but tunable

Question 2

Contrast– difference between lowest and highest intensity level in the image

Answer 2

False.
Contrast– difference between highest and lowest intensity level in the image

Question 3

Gamma is a single pixel operation defined by a set of segments

Answer 3

False
Contrast stretching is used to enhance the contrast of an image– A single-pixel operation like gamma/log/…– Defined by a set of segment

Question 4

Gamma transformation is centered at 1.

Answer 4

True
Check the graph.
values less than 1 and above 1 become darker and has high contrast for the value of gamma

Question 5

Log transformation highlights the differences among pixels in given conditions

Answer 5

True
Log transformation highlights the differences among pixels in given conditions

Question 6

Negative image can switch light to dark. the opposite is not possible

Answer 6

False
Negative image– Switch dark and light