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In October 2013 National Geographic released a file titled American Blackout which dealt with an imagined large-scale cyber attack on SCADA and the US electrical grid.
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mlib_imagethresh5(3mlib) [sunos man page]

mlib_ImageThresh5(3MLIB)				    mediaLib Library Functions					  mlib_ImageThresh5(3MLIB)

mlib_ImageThresh5 - image thresholding SYNOPSIS
cc [ flag... ] file... -lmlib [ library... ] #include <mlib.h> mlib_status mlib_ImageThresh5(mlib_image *dst, const mlib_image *src, const mlib_s32 *thigh, const mlib_s32 *tlow, const mlib_s32 *gray); DESCRIPTION
The mlib_ImageThresh5() function compares each pixel in the source image to two threshold values, tlow and thigh. If the pixel is in between the lower threshold value, tlow, and the higher threshold value, thigh, (inclusive on both sides), then the destination pixel is set to the value gray. Otherwise, the destination pixel is set to the value of the source pixel. It uses the following equation: dst[x][y][i] = src[x][y][i] if src[x][y][i] < tlow[i] dst[x][y][i] = gray[i] if tlow[i] <= src[x][y][i] <= thigh[i] dst[x][y][i] = src[x][y][i] if src[x][y][i] > thigh[i] PARAMETERS
The function takes the following arguments: dst Pointer to destination image. src Pointer to source image. thigh High threshold value. thigh[i] holds the high threshold for channel i. tlow Low threshold value. tlow[i] holds the low threshold for channel i. gray Output grayscale level. gray[i] holds the output grayscale level for channel i. RETURN VALUES
The function returns MLIB_SUCCESS if successful. Otherwise it returns MLIB_FAILURE. ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Interface Stability |Evolving | +-----------------------------+-----------------------------+ |MT-Level |MT-Safe | +-----------------------------+-----------------------------+ SEE ALSO
mlib_ImageThresh1(3MLIB), mlib_ImageThresh1_Fp(3MLIB), mlib_ImageThresh1_Fp_Inp(3MLIB), mlib_ImageThresh1_Inp(3MLIB), mlib_ImageTh- resh2(3MLIB), mlib_ImageThresh2_Fp(3MLIB), mlib_ImageThresh2_Fp_Inp(3MLIB), mlib_ImageThresh2_Inp(3MLIB), mlib_ImageThresh3(3MLIB), mlib_ImageThresh3_Fp(3MLIB), mlib_ImageThresh3_Fp_Inp(3MLIB), mlib_ImageThresh3_Inp(3MLIB), mlib_ImageThresh4(3MLIB), mlib_ImageTh- resh4_Fp(3MLIB), mlib_ImageThresh4_Fp_Inp(3MLIB), mlib_ImageThresh4_Inp(3MLIB), mlib_ImageThresh5_Fp(3MLIB), mlib_ImageTh- resh5_Fp_Inp(3MLIB), mlib_ImageThresh5_Inp(3MLIB), attributes(5) SunOS 5.10 10 Nov 2004 mlib_ImageThresh5(3MLIB)

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