MATLAB Answers

# Create a mosaic using average color of block given image

조회 수: 4(최근 30일)
Shadi Khansa 19 Oct 2020
댓글: Shadi Khansa 16 Nov 2020
I am required to read an image and generate an 8x8 mosaic using the average color of each block. This is my work so far, however the output is black and white. I need help to get the colors. Thank you.
smashpic = imread('PA6_smashing.png');
myfun = @(block_struct) mean2(block_struct.data) *...
ones(size(block_struct.data),class(block_struct.data));
mosaic = blockproc(smashpic,[8 8],myfun);
imshow(mosaic);

댓글을 달려면 로그인하십시오.

### 채택된 답변

Swatantra Mahato 22 Oct 2020
Hi,
I am assuming you want to get the average of color of each block for each component separately. In your function "myfun" by using "mean2()" you get the mean of the entire block as a single value which is then used for R,G and B values.
One way to get the mosaic in color would be to calculate the average for each color of the block separately and then combine them using the "cat" function. Here is an example :
smashpic = imread('peppers.png');
myfun = @(block_struct) cat(3,mean2(block_struct.data(:,:,1))*ones(block_struct.blockSize,class(block_struct.data))...
,mean2(block_struct.data(:,:,2))*ones(block_struct.blockSize,class(block_struct.data))...
,mean2(block_struct.data(:,:,3))*ones(block_struct.blockSize,class(block_struct.data)));
%myfun = @(block_struct) mean2(block_struct.data) *...
%ones(size(block_struct.data),class(block_struct.data)); %resulting image is black and white
mosaic = blockproc(smashpic,[8 8],myfun);
imshow(mosaic);
Hope this helps
##### 댓글 수: 1표시숨기기 없음
Shadi Khansa 16 Nov 2020
Thank you!

댓글을 달려면 로그인하십시오.

### Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!