mkimage -- Make or modify and image with simple values
mkimage image option value [ndim dims]
An image is created or modified using simple values. This task is intended for test and demonstration purposes. A image may be created of a specified size, dimensionality, and pixel datatype. The pixel values used in creating or editing an image consist of a sloped plane (which repeats for dimensions greater than 2) with pseudo-Gaussian noise. The sloped plane is defined such that:
pix[i,j] = value + slope * ((ncols + nlines) / 2 - 1) + slope * (i + j)
where i and j are the pixel indices (starting with 1) and ncols and nlines are the number of columns and lines. The interpretation of "value" is that it is the mean of the plane. The Gaussian noise is only approximately random for purposes of speed!
1. To create an 2 dimensional real image of size 100 x 200 with all zero values:
cl> mkimage name make 0 2 "100 200"
Note that the dimension string is quoted because of the blank separated values.
2. To add noise with a sigma of 5:
cl> mkimage name add 0 sigma=5
2. To replace a region of the image with the value 10:
cl> mkimage name[10:20,30:40] replace 10