def ImageBufWeight(weight, inputBuffer, gamma=0.75, clip=0.05, lut=None):
'''
Apply a bell / triangular weight function to an Image Buffer
'''
(channelType, width, height, channels, orientation, metadata,
inputSpec) = ImageAttributes(inputBuffer)
temp = ImageBufMakeConstant(width, height, channels, oiio.HALF)
grey05 = ImageBufMakeConstant(width, height, channels, oiio.HALF,
tuple([0.5] * channels))
if lut:
ImageBufAlgo.add(temp, temp, inputBuffer)
if 1 in lut:
ImageBufAlgo.clamp(temp, temp, tuple([0.5] * channels),
tuple([1.0] * channels))
if 2 in lut:
ImageBufAlgo.clamp(temp, temp, tuple([0.0] * channels),
tuple([0.5] * channels))
#print( "\tLUT application : %s" % result )
ImageBufAlgo.absdiff(temp, grey05, temp)
else:
ImageBufAlgo.absdiff(temp, grey05, inputBuffer)
ImageBufAlgo.sub(temp, grey05, temp)
ImageBufAlgo.div(temp, temp, 0.5)
ImageBufAlgo.sub(temp, temp, clip)
ImageBufAlgo.mul(temp, temp, 1.0 / (1.0 - clip))
ImageBufAlgo.clamp(temp, temp, tuple([0.0] * channels),
tuple([1.0] * channels))
ImageBufAlgo.pow(weight, temp, gamma)
def ImageBufWeight(weight, inputBuffer, gamma=0.75, clip=0.05, lut=None):
'''
Apply a bell / triangular weight function to an Image Buffer
'''
(channelType, width, height, channels, orientation, metadata, inputSpec) = ImageAttributes(inputBuffer)
temp = ImageBufMakeConstant(width, height, channels, oiio.HALF )
grey05 = ImageBufMakeConstant(width, height, channels, oiio.HALF, tuple([0.5]*channels) )
if lut:
ImageBufAlgo.add(temp, temp, inputBuffer)
if 1 in lut:
ImageBufAlgo.clamp(temp, temp, tuple([0.5]*channels), tuple([1.0]*channels))
if 2 in lut:
ImageBufAlgo.clamp(temp, temp, tuple([0.0]*channels), tuple([0.5]*channels))
#print( "\tLUT application : %s" % result )
ImageBufAlgo.absdiff(temp, grey05, temp)
else:
ImageBufAlgo.absdiff(temp, grey05, inputBuffer)
ImageBufAlgo.sub(temp, grey05, temp)
ImageBufAlgo.div(temp, temp, 0.5)
ImageBufAlgo.sub(temp, temp, clip)
ImageBufAlgo.mul(temp, temp, 1.0/(1.0-clip))
ImageBufAlgo.clamp(temp, temp, tuple([0.0]*channels), tuple([1.0]*channels))
ImageBufAlgo.pow(weight, temp, gamma)
b = ImageBuf()
ImageBufAlgo.sub(
b, make_constimage(64, 64, 3, oiio.HALF, (.1, .2, .3)),
make_constimage(64, 64, 3, oiio.HALF, (.1, .1, .1), 20, 20))
write(b, "sub.exr")
# Test --absdiff and --abs
# First, make a test image that's 0.5 on the left, -0.5 on the right
a = ImageBuf(ImageSpec(128, 128, 3, oiio.HALF))
ImageBufAlgo.fill(a, (0.5, 0.5, 0.5))
ImageBufAlgo.fill(a, (-0.25, -0.25, -0.25), oiio.ROI(0, 64, 0, 128))
b = ImageBuf()
ImageBufAlgo.abs(b, a)
write(b, "abs.exr", oiio.HALF)
b = ImageBuf()
ImageBufAlgo.absdiff(b, a, (0.2, 0.2, 0.2))
write(b, "absdiff.exr", oiio.HALF)
a = ImageBuf()
# mul
b = ImageBuf()
ImageBufAlgo.mul(b, gray128, 1.5)
write(b, "cmul1.exr")
b = ImageBuf()
ImageBufAlgo.mul(b, gray128, (1.5, 1, 0.5))
write(b, "cmul2.exr")
# FIXME -- image multiplication; it's not in testsuite/oiiotool either
# b = ImageBuf()
# ImageBufAlgo.mul (b, make_constimage(64,64,3,oiio.HALF,(.1,.2,.3)),
# make_constimage(64,64,3,oiio.HALF,(.1,.1,.1),20,20))
# write (b, "mul.exr")
# sub
b = ImageBuf()
ImageBufAlgo.sub (b, make_constimage(64,64,3,oiio.HALF,(.1,.2,.3)),
make_constimage(64,64,3,oiio.HALF,(.1,.1,.1),20,20))
write (b, "sub.exr")
# Test --absdiff and --abs
# First, make a test image that's 0.5 on the left, -0.5 on the right
a = ImageBuf (ImageSpec(128,128,3,oiio.HALF))
ImageBufAlgo.fill (a, (0.5,0.5,0.5))
ImageBufAlgo.fill (a, (-0.25,-0.25,-0.25), oiio.ROI(0,64,0,128))
b = ImageBuf()
ImageBufAlgo.abs (b, a)
write (b, "abs.exr", oiio.HALF)
b = ImageBuf()
ImageBufAlgo.absdiff (b, a, (0.2,0.2,0.2))
write (b, "absdiff.exr", oiio.HALF)
a = ImageBuf()
# mul
b = ImageBuf()
ImageBufAlgo.mul (b, gray128, 1.5)
write (b, "cmul1.exr")
b = ImageBuf()
ImageBufAlgo.mul (b, gray128, (1.5,1,0.5))
write (b, "cmul2.exr")
b = ImageBuf()
ImageBufAlgo.mul (b, make_constimage(64,64,3,oiio.HALF,(.5,.5,.5)),
make_constimage(64,64,3,oiio.HALF,(1.5,1,0.5)))
write (b, "mul.exr", oiio.HALF)
write(b, "add.exr")
# sub
b = ImageBufAlgo.sub(
make_constimage(64, 64, 3, oiio.HALF, (.1, .2, .3)),
make_constimage(64, 64, 3, oiio.HALF, (.1, .1, .1), 20, 20))
write(b, "sub.exr")
# Test --absdiff and --abs
# First, make a test image that's 0.5 on the left, -0.5 on the right
a = ImageBuf(ImageSpec(128, 128, 3, oiio.HALF))
ImageBufAlgo.fill(a, (0.5, 0.5, 0.5))
ImageBufAlgo.fill(a, (-0.25, -0.25, -0.25), oiio.ROI(0, 64, 0, 128))
b = ImageBufAlgo.abs(a)
write(b, "abs.exr", oiio.HALF)
b = ImageBufAlgo.absdiff(a, (0.2, 0.2, 0.2))
write(b, "absdiff.exr", oiio.HALF)
a = ImageBuf()
# mul
b = ImageBufAlgo.mul(gray128, 1.5)
write(b, "cmul1.exr")
b = ImageBufAlgo.mul(gray128, (1.5, 1, 0.5))
write(b, "cmul2.exr")
b = ImageBufAlgo.mul(make_constimage(64, 64, 3, oiio.HALF, (.5, .5, .5)),
make_constimage(64, 64, 3, oiio.HALF, (1.5, 1, 0.5)))
write(b, "mul.exr", oiio.HALF)
# mad
b = ImageBufAlgo.mad(
make_constimage(64, 64, 3, oiio.HALF, (.5, .5, .5)),
make_constimage(64,64,3,oiio.HALF,(.1,.1,.1),20,20))
write (b, "add.exr")
# sub
b = ImageBufAlgo.sub (make_constimage(64,64,3,oiio.HALF,(.1,.2,.3)),
make_constimage(64,64,3,oiio.HALF,(.1,.1,.1),20,20))
write (b, "sub.exr")
# Test --absdiff and --abs
# First, make a test image that's 0.5 on the left, -0.5 on the right
a = ImageBuf (ImageSpec(128,128,3,oiio.HALF))
ImageBufAlgo.fill (a, (0.5,0.5,0.5))
ImageBufAlgo.fill (a, (-0.25,-0.25,-0.25), oiio.ROI(0,64,0,128))
b = ImageBufAlgo.abs (a)
write (b, "abs.exr", oiio.HALF)
b = ImageBufAlgo.absdiff (a, (0.2,0.2,0.2))
write (b, "absdiff.exr", oiio.HALF)
a = ImageBuf()
# mul
b = ImageBufAlgo.mul (gray128, 1.5)
write (b, "cmul1.exr")
b = ImageBufAlgo.mul (gray128, (1.5,1,0.5))
write (b, "cmul2.exr")
b = ImageBufAlgo.mul (make_constimage(64,64,3,oiio.HALF,(.5,.5,.5)),
make_constimage(64,64,3,oiio.HALF,(1.5,1,0.5)))
write (b, "mul.exr", oiio.HALF)
# mad
b = ImageBufAlgo.mad (make_constimage(64,64,3,oiio.HALF,(.5,.5,.5)),
make_constimage(64,64,3,oiio.HALF,(1.5,1,0.5)),
