Chapter 1, Problem 10CRP

Explanation of Solution

Determine the number of photographs stored in a digital camera:

The storage capacity of digital camera is $256\text{MB}$.

• To find the number of pixels occupied by a photograph, multiply the pixels per row by the pixels per column of the photograph as shown below:

$\begin{array}{c}\text{The number of pixels occupied by the photograph}=1024\times 1024\\ =1048576\end{array}$

• Thus, if $1024\text{pixels}$ per row and $1024\text{pixels}$ per column are used to store one photograph in camera, then to store one photograph $1048576\text{pixels}$ are needed.
• If each pixel requires three bytes of storage, convert pixels into bytes by multiplying the above result by $3$.

$\begin{array}{c}\text{Number}\text{of}\text{bytes}=1048576\times 3\text{bytes}\\ =\text{3145728}\text{bytes}\end{array}$

• To represent the above result in megabytes, convert the bytes into megabytes by dividing the result by $1,000,000$