Question

WRITE A C++ PROGRAM TO ANSWER THE QUESTIONS BELOW.

You are provided with an image in a new file format called JBC

Here is an example of the format:

2 3

100 50 40

200 66 56

12 45 65

23 67 210

0 255 100

45 32 123

The first line means that this is a 2 (width) by 3 (height) image of pixels. Then,

each line represents the color of a pixel. The numbers are from 0 to 255. The

first number is the amount of red, the second number is the amount of green,

and the third number is the amount of blue.

The pixels in the file are ordered starting at the top left. The first row is given

(left to right), then the next row, all the way to the bottom.

So this file is really

(100 50 40)(200 66 56)

(12 45 65)(23 67 210)

(0 255 100)(45 32 123)

where the () indicate “pixels” in a 2 by 3 grid. Each pixel has an

<x,y>

location.

The top left pixel is

<0,0>

and in this case the bottom right pixel location is

<1,2>

Q1 Black pixel count

A black pixel is (0,0,0).

How many black pixels are in the image?

1

Q2 Brightest Pixel

The brightness (actually, relative luminance, but we will call it brightness) of a

pixel is defined as:

Y=(0.2126R+0.7152G+0.0722B)/255

and is a real number between 0 and 1.

What is the location

<x,y>

of the brightest pixel, not counting the white ones?

white pixel is (255, 255, 255)

Q3 Different colors

Determine how many different colors are in the image.

Q4 Most common color

What is the most common color

other

than black or white. (question 4a) and

how many times does it occur in the image (question 4b)?