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hasdata

Returns true if more data is available in blockedImageDatastore

    Description

    example

    tf = hasdata(bimds) returns a logical scalar, true or false, indicating the availability of data in the blockedImageDatastore bimds. Use hasdata in conjunction with the read function to read all the data within the datastore. Call hasdata before calling read.

    Examples

    collapse all

    Create a blocked image from a sample image.

    bim = blockedImage('tumor_091R.tif');

    Create a blockedImageDatastore object from the blocked image, bim.

    bimds = blockedImageDatastore(bim);

    Read blocks from the blockedImageDatastore until there is no more data to read, that is, until hasdata returns false.

    while hasdata(bimds)
        [data, info] = read(bimds);
        disp(info);
    end
           BlockSub: [1 1 1]
              Start: [1 1 1]
                End: [1024 1024 3]
              Level: 1
        ImageNumber: 1
         BorderSize: [0 0 0]
          BlockSize: [1024 1024 3]
    
           BlockSub: [1 2 1]
              Start: [1 1025 1]
                End: [1024 2048 3]
              Level: 1
        ImageNumber: 1
         BorderSize: [0 0 0]
          BlockSize: [1024 1024 3]
    
           BlockSub: [1 3 1]
              Start: [1 2049 1]
                End: [1024 3072 3]
              Level: 1
        ImageNumber: 1
         BorderSize: [0 0 0]
          BlockSize: [1024 1024 3]
    
           BlockSub: [1 4 1]
              Start: [1 3073 1]
                End: [1024 4096 3]
              Level: 1
        ImageNumber: 1
         BorderSize: [0 0 0]
          BlockSize: [1024 1024 3]
    
           BlockSub: [1 5 1]
              Start: [1 4097 1]
                End: [1024 5120 3]
              Level: 1
        ImageNumber: 1
         BorderSize: [0 0 0]
          BlockSize: [1024 1024 3]
    
           BlockSub: [1 6 1]
              Start: [1 5121 1]
                End: [1024 6144 3]
              Level: 1
        ImageNumber: 1
         BorderSize: [0 0 0]
          BlockSize: [1024 1024 3]
    
           BlockSub: [2 1 1]
              Start: [1025 1 1]
                End: [2048 1024 3]
              Level: 1
        ImageNumber: 1
         BorderSize: [0 0 0]
          BlockSize: [1024 1024 3]
    
           BlockSub: [2 2 1]
              Start: [1025 1025 1]
                End: [2048 2048 3]
              Level: 1
        ImageNumber: 1
         BorderSize: [0 0 0]
          BlockSize: [1024 1024 3]
    
           BlockSub: [2 3 1]
              Start: [1025 2049 1]
                End: [2048 3072 3]
              Level: 1
        ImageNumber: 1
         BorderSize: [0 0 0]
          BlockSize: [1024 1024 3]
    
           BlockSub: [2 4 1]
              Start: [1025 3073 1]
                End: [2048 4096 3]
              Level: 1
        ImageNumber: 1
         BorderSize: [0 0 0]
          BlockSize: [1024 1024 3]
    
           BlockSub: [2 5 1]
              Start: [1025 4097 1]
                End: [2048 5120 3]
              Level: 1
        ImageNumber: 1
         BorderSize: [0 0 0]
          BlockSize: [1024 1024 3]
    
           BlockSub: [2 6 1]
              Start: [1025 5121 1]
                End: [2048 6144 3]
              Level: 1
        ImageNumber: 1
         BorderSize: [0 0 0]
          BlockSize: [1024 1024 3]
    
           BlockSub: [3 1 1]
              Start: [2049 1 1]
                End: [3072 1024 3]
              Level: 1
        ImageNumber: 1
         BorderSize: [0 0 0]
          BlockSize: [1024 1024 3]
    
           BlockSub: [3 2 1]
              Start: [2049 1025 1]
                End: [3072 2048 3]
              Level: 1
        ImageNumber: 1
         BorderSize: [0 0 0]
          BlockSize: [1024 1024 3]
    
           BlockSub: [3 3 1]
              Start: [2049 2049 1]
                End: [3072 3072 3]
              Level: 1
        ImageNumber: 1
         BorderSize: [0 0 0]
          BlockSize: [1024 1024 3]
    
           BlockSub: [3 4 1]
              Start: [2049 3073 1]
                End: [3072 4096 3]
              Level: 1
        ImageNumber: 1
         BorderSize: [0 0 0]
          BlockSize: [1024 1024 3]
    
           BlockSub: [3 5 1]
              Start: [2049 4097 1]
                End: [3072 5120 3]
              Level: 1
        ImageNumber: 1
         BorderSize: [0 0 0]
          BlockSize: [1024 1024 3]
    
           BlockSub: [3 6 1]
              Start: [2049 5121 1]
                End: [3072 6144 3]
              Level: 1
        ImageNumber: 1
         BorderSize: [0 0 0]
          BlockSize: [1024 1024 3]
    
           BlockSub: [4 1 1]
              Start: [3073 1 1]
                End: [4096 1024 3]
              Level: 1
        ImageNumber: 1
         BorderSize: [0 0 0]
          BlockSize: [1024 1024 3]
    
           BlockSub: [4 2 1]
              Start: [3073 1025 1]
                End: [4096 2048 3]
              Level: 1
        ImageNumber: 1
         BorderSize: [0 0 0]
          BlockSize: [1024 1024 3]
    
           BlockSub: [4 3 1]
              Start: [3073 2049 1]
                End: [4096 3072 3]
              Level: 1
        ImageNumber: 1
         BorderSize: [0 0 0]
          BlockSize: [1024 1024 3]
    
           BlockSub: [4 4 1]
              Start: [3073 3073 1]
                End: [4096 4096 3]
              Level: 1
        ImageNumber: 1
         BorderSize: [0 0 0]
          BlockSize: [1024 1024 3]
    
           BlockSub: [4 5 1]
              Start: [3073 4097 1]
                End: [4096 5120 3]
              Level: 1
        ImageNumber: 1
         BorderSize: [0 0 0]
          BlockSize: [1024 1024 3]
    
           BlockSub: [4 6 1]
              Start: [3073 5121 1]
                End: [4096 6144 3]
              Level: 1
        ImageNumber: 1
         BorderSize: [0 0 0]
          BlockSize: [1024 1024 3]
    
           BlockSub: [5 1 1]
              Start: [4097 1 1]
                End: [5120 1024 3]
              Level: 1
        ImageNumber: 1
         BorderSize: [0 0 0]
          BlockSize: [1024 1024 3]
    
           BlockSub: [5 2 1]
              Start: [4097 1025 1]
                End: [5120 2048 3]
              Level: 1
        ImageNumber: 1
         BorderSize: [0 0 0]
          BlockSize: [1024 1024 3]
    
           BlockSub: [5 3 1]
              Start: [4097 2049 1]
                End: [5120 3072 3]
              Level: 1
        ImageNumber: 1
         BorderSize: [0 0 0]
          BlockSize: [1024 1024 3]
    
           BlockSub: [5 4 1]
              Start: [4097 3073 1]
                End: [5120 4096 3]
              Level: 1
        ImageNumber: 1
         BorderSize: [0 0 0]
          BlockSize: [1024 1024 3]
    
           BlockSub: [5 5 1]
              Start: [4097 4097 1]
                End: [5120 5120 3]
              Level: 1
        ImageNumber: 1
         BorderSize: [0 0 0]
          BlockSize: [1024 1024 3]
    
           BlockSub: [5 6 1]
              Start: [4097 5121 1]
                End: [5120 6144 3]
              Level: 1
        ImageNumber: 1
         BorderSize: [0 0 0]
          BlockSize: [1024 1024 3]
    

    Input Arguments

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    Blocked image datastore, specified as a blockedImageDatastore object.

    Output Arguments

    collapse all

    Data availability, returned as a logical scalar, true or false.

    Introduced in R2021a