Is Correct My Solutions

I have this question :

1-Read an image.

2-Show that image.

3-Write the image to the disk by new name.

4-Show additional info about image.

5-How to get the size of that image.

6-What is the intensity value of the pixel located at position(4,7)?

*I solved the previous six questions, but Is the Solution is correct ?

figure

image_mat = rgb2gray(imread('Picture3.jpg')); % image_mat is simply a matrix

disp(image_mat(4, 7))

imshow(image_mat)

Answer 1

[Image Analyst]

No. Your solution here does not do what steps 1-6 ask. For example, it did not say to convert to gray scale in any of the 6 items. For step 3 I don't see any call to imwrite(). Also, step 4 does not explain what "additional info" is but you might call dir() or imfinfo() and see what those return. For step 5, I don't see where you called the size() or dir() function, depending on what they mean by "size", which can mean dimension lengths, or bytes on disk. Step 6 is pretty vague, like what does "what" mean? Does it want you to get the intensity and store it in a variable, or just display it with disp() or fprintf(), or what does it want if the image is color - convert to grayscale or give each color channel's intensities separately?

[Nour George]

and this is Solution ,is Correct ?

figure

image_mat = imread('Picture3.jpg'); % image_mat is simply a matrix

imshow(image_mat);

imwrite(image_mat,'House.jpg');

information = imfinfo('House.jpg');

information = information.FileSize;

disp(image_mat(4, 7))

imshow(image_mat);

[Image Analyst]

The "show" part of step 4 is missing. You can either leave off the semicolon or use fprintf()

fprintf('The file size is %d', information);

For step 5, you might want to do this

[rows, columns, numberOfColorChannels] = size(image_mat)

[Nour George]

thanks , and what about Question 6 ?

and The picture is colored, should I use rgb2gray()?