Tiff.computeTile

Returns the index of the tile that contains a given image position.

Category: Data Import and Analysis > Data Import and Export

Syntax

tileNum = computeTile(t, [row col])

Description

The method acts on a Tiff object created with Tiff(filename, mode). Tiled TIFF files split the image into a grid of fixed-size rectangles, whose size is given by the TileWidth and TileLength tags. Tiles are numbered row by row. This image fits inside one tile, so every position falls in tile 1.

Input arguments

t

Tiff object open on a tiled image.

[row col]

Pixel coordinates, counted from 1.

Output arguments

tileNum

Tile index, counted from 1, for use with readEncodedTile.

Example

Tile of a pixel

tag.ImageLength = 4; tag.ImageWidth = 4;
tag.Photometric = Tiff.Photometric.MinIsBlack;
tag.BitsPerSample = 8; tag.SamplesPerPixel = 1;
tag.TileLength = 16; tag.TileWidth = 16;
tag.PlanarConfiguration = Tiff.PlanarConfiguration.Chunky;
w = Tiff('u.tif', 'w'); w.setTag(tag); w.write(uint8(magic(4))); w.close();
r = Tiff('u.tif', 'r');
r.isTiled()
r.computeTile([2 3])
r.close();

ans = logical
   1
ans = 1

See also

Tiff.readEncodedTile Tiff.numberOfTiles Tiff.isTiled Tiff.computeStrip