mlib_ImageInvert(3MLIB) mediaLib Library Functions mlib_ImageInvert(3MLIB)NAME
mlib_ImageInvert - invert
SYNOPSIS
cc [ flag... ] file... -lmlib [ library... ]
#include <mlib.h>
mlib_status mlib_ImageInvert(mlib_image *dst, const mlib_image *src);
DESCRIPTION
The mlib_ImageInvert() function performs the inversion of an image such that white becomes black, light gray becomes dark gray, and so on.
It uses the following equation:
dst[x][y][i] = (Gwhite + Gblack) - src[x][y][i]
The values of Gwhite and Gblack for different types of images are:
Image Type Gwhite Gblack Gwhite + Gblack
MLIB_BYTE 255 0 255(0xFF)
MLIB_SHORT 32767 -32768 -1(0xFFFF)
MLIB_USHORT 65535 0 65535(0xFFFF)
MLIB_INT 2147483647 -2147483648 -1(0xFFFFFFFF)
Given that integer data are in the two's complement representation, mlib_ImageInvert() is the same as mlib_ImageNot(), while mlib_ImageIn-
vert_Inp() is the same as mlib_ImageNot_Inp().
PARAMETERS
The function takes the following arguments:
dst Pointer to destination image.
src Pointer to source image.
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_ImageInvert_Inp(3MLIB), mlib_ImageInvert_Fp(3MLIB), mlib_ImageInvert_Fp_Inp(3MLIB), attributes(5)SunOS 5.10 10 Nov 2004 mlib_ImageInvert(3MLIB)
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mlib_ImageColorHSV2RGB(3MLIB) mediaLib Library Functions mlib_ImageColorHSV2RGB(3MLIB)NAME
mlib_ImageColorHSV2RGB - HSV to RGB color conversion
SYNOPSIS
cc [ flag... ] file... -lmlib [ library... ]
#include <mlib.h>
mlib_status mlib_ImageColorHSV2RGB(mlib_image *dst, const mlib_image *src);
DESCRIPTION
The mlib_ImageColorHSV2RGB() function performs a conversion from hue/saturation/value to red/green/blue. The source and destination images
must be three-channel images.
It uses the following equations:
P = V*(1 - S)
Q = V*(1 - S*fraction(H*6))
T = V*(1 - S*(1 - fraction(H*6)))
R, G, B = V, T, P if 0 <= H < 1/6
R, G, B = Q, V, P if 1/6 <= H < 2/6
R, G, B = P, V, T if 2/6 <= H < 3/6
R, G, B = P, Q, V if 3/6 <= H < 4/6
R, G, B = T, P, V if 4/6 <= H < 5/6
R, G, B = V, P, Q if 5/6 <= H < 1
where 0 <= H < 1 and 0 <= S, V, P, Q, T, R, G, B <= 1.
Assuming a pixel in the source image is (h, s, v) and its corresponding pixel in the destination image is (r, g, b), then for MLIB_BYTE
images, the following applies:
H = h/256
S = s/255
V = v/255
r = R*255
g = G*255
b = B*255
for MLIB_SHORT images, the following applies:
H = (h + 32768)/65536
S = (s + 32768)/65535
V = (v + 32768)/65535
r = R*65535 - 32768
g = G*65535 - 32768
b = B*65535 - 32768
for MLIB_USHORT images, the following applies:
H = h/65536
S = s/65535
V = v/65535
r = R*65535
g = G*65535
b = B*65535
and for MLIB_INT images, the following applies:
H = (h + 2147483648)/4294967296
S = (s + 2147483648)/4294967295
V = (v + 2147483648)/4294967295
r = R*4294967295 - 2147483648
g = G*4294967295 - 2147483648
b = B*4294967295 - 2147483648
PARAMETERS
The function takes the following arguments:
dst Pointer to destination image.
src Pointer to source image.
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_ImageColorHSV2RGB_Fp(3MLIB), mlib_ImageColorRGB2HSV(3MLIB), mlib_ImageColorRGB2HSV_Fp(3MLIB), attributes(5)SunOS 5.10 10 Nov 2004 mlib_ImageColorHSV2RGB(3MLIB)