Histograms - Pixel operations

Question 1

Describe histogram specification + exercize.

Question 2

Describe histogram equalization + exercize.

Question 3

Describe histograms.

Answer 3

Tool in Image processing. Graphical representation of the distribution of data. An image histogram gives a graphical representation of the distribution of pixel intensities in a digital image.

Question 4

Define Negative image, Log transformation and Gamma transformation.

Answer 4

1) s = (L-1) - r
2) 𝑠 = 𝑐 log(1 + 𝑟)
3) 𝑠 = 𝑐𝑟^y where 𝑐 = (𝐿 − 1)^1−y

Question 5

What is the Intensity slicing and the bit plane slicing?

Answer 5

Intensity slicing: modify only a set of pixels

Bit plane slicing: pixel importance