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

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abory kikla 2016-3-13

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评论： Muhammad Usman Saleem 2016-3-30

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

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Jan 2016-3-14

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?

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Walter Roberson 2016-3-29

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

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abory kikla 2016-3-30

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 2016-3-30

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.

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Geoff Hayes 2016-3-13

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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.

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Geoff Hayes 2016-3-14

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.