Problem $3$: Functional Expansion $($Matlab$)$

Filename:

expandImage.m

Turn Problem $4$ from HW$08$ into a more flexible and dynamic function: expandlmage

Function Declaration

function $[$resultImageMatrix$]=$ expandImage$($ filename, scaleFactor $)$

$-$ function should accept two arguments:

$-$ a file name of an appropriately bit mapped unit$8$ grayscale image.

$-$ a positive integer value that specifies the scaling factor

$-$ Note the input parameter is the filename! Not the image matrix.

$-$ function should return the resultImageMatrix

$-$ function should not display any images!.

$-$ function should error if the argument is not a positive integer

$-$ is there a limit to integer size your function can deal with? IF so$,$ check for this. Make sure it's in your "help" Problem $4$: Image Inversion

Filename:

invertImage.m

Sample image: CloudyGoldenGate$\_$grayscale.jpg $\backslash (\backslash$downarrow $\backslash )$

Additional image files above.

Write a script

For the image exercises, you can test with any grayscale image that imread is capable of accepting. Please make sure the image truly is stored as $8-$bit grayscale otherwise you will encounter significantly larger and more complex data sets.

Write a program that will invert the negative$/$positive of grayscale image.

The program should input a grayscale bitmap image $($the golden grate bridge file is a good example$)$ and perform mathematical analysis on the image matrix data, inverting the negative$/$positive of the grayscale image. In other words, what was white should be black. What was black should be white. Everything in the middle should proportionally invert. For example, light black should become dark black.

After the conversion, the new, modified image should be output using imshow.