mmreadgray - Read an image from a commercial file format and stores it as a gray-scale image.

Synopsis

y = mmreadgray( filename )

Input

filename: String. Name of file. Possible extensions: tif, hdf, jpg, bmp, pcx, xwd.

Output

y: Gray-scale (uint8 or uint16) or binary image (logical uint8).

Description

mmimread reads the image in filename and stores it in y, an uint8 gray-scale image (without colormap). If the input file is a color image, it is converted to gray-scale. This function calls the MATLAB function imread.

Examples

a=mmreadgray('small_bw.tif'); mmshow(a) a_aux(:,:,1) = Columns 1 through 12 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 255 255 0 0 0 0 0 0 0 0 0 255 255 255 255 0 0 0 0 0 0 0 255 255 255 255 255 255 0 0 0 0 0 255 255 255 255 255 255 255 255 0 0 0 255 255 255 255 255 255 255 255 255 0 0 255 255 255 255 255 255 255 255 255 255 0 255 255 255 255 255 255 255 255 255 255 255 0 255 255 255 255 255 255 255 255 255 255 255 0 255 255 255 255 255 255 255 255 255 255 255 0 0 255 255 255 255 255 255 255 255 255 255 0 0 0 255 255 255 255 255 255 255 255 255 0 0 0 0 0 0 0 255 255 0 0 0 0 0 0 0 0 0 255 255 255 255 0 0 0 0 0 0 0 255 255 255 255 255 255 0 0 0 0 0 0 0 0 0 0 0 0 0 Columns 13 through 16 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 255 0 0 0 255 255 0 0 255 255 255 0 255 255 255 0 255 255 255 0 255 255 0 0 255 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 a_aux(:,:,2) = Columns 1 through 12 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 255 255 0 0 0 0 0 0 0 0 0 255 255 255 255 0 0 0 0 0 0 0 255 255 255 255 255 255 0 0 0 0 0 255 255 255 255 255 255 255 255 0 0 0 255 255 255 255 255 255 255 255 255 0 0 255 255 255 255 255 255 255 255 255 255 0 255 255 255 255 255 255 255 255 255 255 255 0 255 255 255 255 255 255 255 255 255 255 255 0 255 255 255 255 255 255 255 255 255 255 255 0 0 255 255 255 255 255 255 255 255 255 255 0 0 0 255 255 255 255 255 255 255 255 255 0 0 0 0 0 0 0 255 255 0 0 0 0 0 0 0 0 0 255 255 255 255 0 0 0 0 0 0 0 255 255 255 255 255 255 0 0 0 0 0 0 0 0 0 0 0 0 0 Columns 13 through 16 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 (a)

Equation

where H and W are, respectively, the number of rows and columns of the image f. f(1,1) is the top-left pixel of f.

where k=1, 255 and 65535, respectively, for binary images, uint8, and uint16 gray-scale images.

See Also

mmwrite - Write a gray-scale image into a commercial file format.

Source code

mmreadgray.m

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