setBlock

Create a blocked image to which you can write data. You specify the format of the blocked image in the destination parameter. To write to memory, specify an empty matrix. You must also specify the size of the image and the size of the blocks into which you want the image chunked. The initial value parameter depends on the format you specified in destination. To create a writable blocked image, specify the 'Mode' parameter with the value 'w' for write mode.

destination = [];
imgsize = [5 7];
blocksize = [2 2];
initval = uint8(0);
bim = blockedImage(destination,imgsize,blocksize,initval, "Mode", 'w');

Write data to the specified blocks in the blocked image by using the setBlock object function. The blocksubs parameter specifies the coordinates of the block to which you want to write data. The blockdata parameter specifies the data to write to the specified block. The size of blockdata must match the block size.

blocksubs = [1 1];
blockdata = ones(2,2,"uint8");
setBlock(bim, blocksubs, blockdata)

Close the image for writing.

Switch the blocked image to read mode by setting the 'Mode' parameter to 'r' for read.

bim.Mode = 'r'

bim = 

  blockedImage with properties:

   Read only properties
             Source: "    {5×7 uint8}↵"
            Adapter: [1×1 images.blocked.InMemory]
               Size: [5 7]
       SizeInBlocks: [3 4]
    ClassUnderlying: "uint8"

   Settable properties
          BlockSize: [2 2]

Create the full image by using the gather function to collect all the individual blocks.

fullImage = gather(bim);

Display details of the blocked image at the command line.

disp(fullImage)

   1   1   0   0   0   0   0
   1   1   0   0   0   0   0
   0   0   0   0   0   0   0
   0   0   0   0   0   0   0
   0   0   0   0   0   0   0