% Function Name: imageInterp % Inputs (3): - (uint8) An image array % - (double)

Question

% Function Name: imageInterp

% Inputs (3): - (uint8) An image array

% - (double) The new number of rows the image should have

% - (double) The new number of columns the image should have

% Output (1): - (uint8) A resized image using interpolation

%

% Function Description:

% Write a function called "imageInterp" that takes in an image array and

% the new dimensions of the images and scales the image using

% interpolation. Scaling using interpolation results in clearer images

% when resizing versus traditional techniques.

%

% To scale an image with interpolation, the function first scales the

% width of the image to the new column amount. This can be accomplished by

% iterating through each row of image and using the interp() function to

% find the new pixel values. The interp() function takes in a vector of

% x-values, a vector of corresponding y-values, and a vector of new

% x-values within the same range as the original, and gives back what the

% probable new y-values would be if there was a linear relationship

% between the data sets. For additional information, please type 'help

% interp' in the Command Window.

%

% When performing the linear interpolation, the x-values are taken to be

% the column indices of the image, and the y-values are the current values

% at a layer. The new x-values are then the indices found using the

% conventional re-indexing formula taught in class, except that the

% round() is not applied. Essentially, the new x-values should equal the

% linspace(1, col, new_col). After all the rows are scaled, the image has

% been scaled to the given width. The same process is then repeated except

% we now loop through the columns and use the row indices as the

% x-values, completing the resizing of the image.

%

% Test Cases:

% img = imread('sample.png');

% new_img = imageInterp(img, 400, 400);

% imshow(new_img)

% => Should look like imageInterp1.png

%

% img = imread('buzz.png');

% new_img = imageInterp(img, round(336*1.4), round(445*1.4));

% imshow(new_img)

% => Should look like imageInterp2.png

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