How can I read a single band, from a multi-band GeoTiff file?

Question

Ioannis Lantzanakis 2022-3-25

回答： Ashish Uthama 2024-5-10

Hi, i have spent a lot of time to figure out how can i read only a specific band from a geoTiff file.

I have a GeoTiff file with a lot of bands and i need to import to my code, only one of them.

I tried:

imread( 'mybigdata.tif' , 3 );

%Error message : Invalid TIFF image index 3.

tiffreadVolume( 'mybigdata.tif' , 'PixelRegion' , { [1 1 inf] , [1 1 inf] , [3 3] });

%Error message Requested slice 3 is greater than the number of slices (1) in the volume.

if i use X = tiffreadVolume( 'mybigdata.tif' , 'PixelRegion' , { [1 1 inf] , [1 1 inf] , [1 1] });

Name Size Bytes Class Attributes

X 1698x1493x1x13 131825928 single

I can see the 13 bands in this example, in 4th dimension for some reason, but i dont know how to read only the one of them

if i use X = imread( 'mybigdata.tif' ); , the whole image is imported again:

Name Size Bytes Class Attributes

X 1698x1493x13 131825928 single

My tiff file was created using: geotiffwrite.

Any ideas?

Thanks in Advance.

Answer 1

Ashish Uthama 2024-5-10

Please try the 'Bands' Name-Value argument in readgeoraster.