If you please I want to link this instruction{ rgbImage = cat(3, redChannel, greenChannel, blueChannel);} with the rand() function until I get the following result ,,,How to do it

If you please I want to link this instruction{ rgbImage = cat(3, redChannel, greenChannel, blueChannel);} with the rand() function until I get the following result ,,,How to do it

[Jan]

The question is not clear. Do you know how to create the image? Should the image appear in a figure or do you want to save it in an image file? Does the size of the patchs matter?

Answer 1

[Walter Roberson]

Hint: randomly select color numbers. kron() with ones() to make copies of the numbers.

[abory kikla]

Well I have used it,, but the picture show without color,, only black and white,, I want color.

This is my work,,What is missing to show color image:

J=checkerboard(64,4,4);

J=J>0;

x=ones(8);

A=kron(x,J);

imshow(A);

[Walter Roberson]

I said nothing about checkerboard. I said "randomly select color numbers". Where is your random selection of color numbers?

[Image Analyst]

Are you still trying to get this to work after more than 2 weeks?

[abory kikla]

Yes Mr. analyzer. I will not lose hope

[abory kikla]

Mr. Walter. But required me to also used checkerboard function in the code

[Walter Roberson]

Earlier you wrote the requirement as

",This required: Create checkerboard image using the matrix manipulation to implement a color chessboard image size 1024* 1024 ,where each stone size 32 * 32 without any loop statement.and by Using Conversion ,Rand function"

That does not require that you use the checkerboard() function. "Checkerboard" is the style of grid.

[abory kikla]

This was the first required,,,The third required is: Use checkerboard/kron function to implement a color chessboard image size 1024* 1024 ,where each stone size 32 * 32.

[Walter Roberson]

However, it does not need to be randomly colored. Also it is not clear that it requires using both of those: it could be requiring that you use at least one of them.

Answer 2

[Geoff Hayes]

abory - it isn't clear to me why you need to use cat or how you would link this with rand. Presumably, you wish to create randomly coloured squares and then patch them together. Rather than use cat and rand, I may do something like

 % define the number of squares per edge (where the edge is the row or column)
 numSqrsPerEdge = 8;

 % define the number of pixels per square edge
 numPixelsPerSqrEdge = 25;

The above would give us an 8x8 square of squares, where each sub-square is 25x25 whose colour is randomly generated.

To generate any one sub-square, you could do randi as

 % generate the random colour
 sqrColour = uint8(randi(256,1,1,3) - 1);

 % create the sub-square
 subSquare = repmat(sqrColour, numPixelsPerSqrEdge, numPixelsPerSqrEdge);

You can use the above for each of the 64 (8x8) sub-squares, concatenating or (perhaps better) inserting each sub-square into an already sized 8x8 (or 200x200x3) array.

[abory kikla]

Required of me create a 3 matrices Then merged into with some by cat function..Then make a the merged matrix Taking the values of rand function,,Here it is required of me to be All matrix cells Colored random colors,,I mean, like the previous image

[Geoff Hayes]

abory - why three matrices? Why merge with some only? By matrix cells do you mean a cell array? Please clarify the algorithm that you are required to implement.

[abory kikla]

Geoff Hayes,,This required: Create checkerboard image using the matrix manipulation to implement a color chessboard image size 1024* 1024 ,where each stone size 32 * 32 without any loop statement.and by Using Conversion ,Rand function

[Geoff Hayes]

So each square is 32x32 pixels, and there are 32 squares in each row (and column). Since you can't use a loop statement, what are you allowed to use? What is the Conversion function?

As this is homework, please present what you have tried so far.

[Geoff Hayes]

I hadn't realized that you had already posted this question earlier at http://www.mathworks.com/matlabcentral/answers/271727-i-am-new-at-matlab-and-i-want-create-color-checkerboard. Please don't post duplicate questions.

Answer 3

[Muhammad Usman Saleem]

use imread and then imshow.. Not understand your question?

[abory kikla]

Mohammed understand the Arabic language

[abory kikla]

Mr. Mohammed How do I use kron() &chessboard() function with some for the next image.

color chessboard image

[Walter Roberson]

The probability that you will get that exact output is virtually non-existent in practice. You would be running for millions of years, as there are 2^512 different color checkerboard patterns.

[abory kikla]

I will explain to you my question by code...is this OK?

[Muhammad Usman Saleem]

you are little confuse. Please be confident always.