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)
image_small = ImageBuf()
# transpose
b = ImageBuf()
ImageBufAlgo.transpose(b, ImageBuf("../oiiotool/image.tif"))
write(b, "transpose.tif")
# circular_shift
b = ImageBuf()
ImageBufAlgo.circular_shift(b, ImageBuf("../oiiotool/image.tif"), 100, 50)
write(b, "cshift.tif")
# clamp
b = ImageBuf()
ImageBufAlgo.resize(b, grid, roi=oiio.ROI(0, 500, 0, 500))
ImageBufAlgo.clamp(b, b, (0.2, 0.2, 0.2, 0.2), (100, 100, 0.5, 1))
write(b, "grid-clamped.tif", oiio.UINT8)
# add
b = ImageBuf()
ImageBufAlgo.add(b, gray128, 0.25)
write(b, "cadd1.exr")
b = ImageBuf()
ImageBufAlgo.add(b, gray128, (0, 0.25, -0.25))
write(b, "cadd2.exr")
b = ImageBuf()
ImageBufAlgo.add(
b,
make_constimage(64, 64, 3, oiio.HALF, (0.1, 0.2, 0.3)),
make_constimage(64, 64, 3, oiio.HALF, (0.1, 0.1, 0.1), 20, 20),
)
image_small = ImageBuf()
# transpose
b = ImageBuf()
ImageBufAlgo.transpose(b, ImageBuf("../oiiotool/image.tif"))
write(b, "transpose.tif")
# circular_shift
b = ImageBuf()
ImageBufAlgo.circular_shift(b, ImageBuf("../oiiotool/image.tif"), 100, 50)
write(b, "cshift.tif")
# clamp
b = ImageBuf()
ImageBufAlgo.resize(b, grid, roi=oiio.ROI(0, 500, 0, 500))
ImageBufAlgo.clamp(b, b, (0.2, 0.2, 0.2, 0.2), (100, 100, 0.5, 1))
write(b, "grid-clamped.tif", oiio.UINT8)
# add
b = ImageBuf()
ImageBufAlgo.add(b, gray128, 0.25)
write(b, "cadd1.exr")
b = ImageBuf()
ImageBufAlgo.add(b, gray128, (0, 0.25, -0.25))
write(b, "cadd2.exr")
b = ImageBuf()
ImageBufAlgo.add(
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, "add.exr")