b = ImageBuf()
ImageBufAlgo.channel_sum(b, ImageBuf("../oiiotool/tahoe-small.tif"), (0.2126, 0.7152, 0.0722))
write(b, "chsum.tif", oiio.UINT8)
# premult/unpremult
b = make_constimage(100, 100, 4, oiio.FLOAT, (0.1, 0.1, 0.1, 1))
ImageBufAlgo.fill(b, (0.2, 0.2, 0.2, 0.5), oiio.ROI(50, 80, 50, 80))
ImageBufAlgo.unpremult(b, b)
write(b, "unpremult.tif")
ImageBufAlgo.premult(b, b)
write(b, "premult.tif")
b = ImageBuf("../oiiotool/tahoe-small.tif")
ImageBufAlgo.rangecompress(b, b)
write(b, "rangecompress.tif", oiio.UINT8)
ImageBufAlgo.rangeexpand(b, b)
write(b, "rangeexpand.tif", oiio.UINT8)
# FIXME - colorconvert, ociolook need tests
# computePixelStats
compresults = oiio.CompareResults()
ImageBufAlgo.compare(ImageBuf("flip.tif"), ImageBuf("flop.tif"), 1.0e-6, 1.0e-6, compresults)
print "Comparison: of flip.tif and flop.tif"
print " mean =", compresults.meanerror
print " rms =", compresults.rms_error
print " PSNR =", compresults.PSNR
print " max =", compresults.maxerror
print " max @", (compresults.maxx, compresults.maxy, compresults.maxz, compresults.maxc)
print " warns", compresults.nwarn, "fails", compresults.nfail
b = ImageBufAlgo.unpremult(b)
write(b, "unpremult.tif")
b = ImageBufAlgo.premult(b)
write(b, "premult.tif")
b = ImageBufAlgo.contrast_remap(tahoetiny, black=0.1, white=0.75)
write(b, "contrast-stretch.tif")
b = ImageBufAlgo.contrast_remap(tahoetiny, min=0.1, max=0.75)
write(b, "contrast-shrink.tif")
b = ImageBufAlgo.contrast_remap(tahoetiny, scontrast=5.0)
write(b, "contrast-sigmoid5.tif")
b = ImageBuf(OIIO_TESTSUITE_ROOT + "/oiiotool/src/tahoe-small.tif")
b = ImageBufAlgo.rangecompress(b)
write(b, "rangecompress.tif", oiio.UINT8)
b = ImageBufAlgo.rangeexpand(b)
write(b, "rangeexpand.tif", oiio.UINT8)
# FIXME - colorconvert, ociolook need tests
print("\nTesting color conversions:")
b = make_constimage(2, 2, 4, oiio.FLOAT, (0, 0, 0, 1))
b.setpixel(1, 0, (.25, .25, .25, 1))
b.setpixel(0, 1, (.5, .5, .5, 1))
b.setpixel(1, 1, (1, 1, 1, 1))
dumpimg(b, msg="linear src=")
r = ImageBufAlgo.colorconvert(b, "Linear", "sRGB")
dumpimg(r, msg="to srgb =")
r = ImageBufAlgo.colorconvert(r, "sRGB", "Linear")
dumpimg(r, msg="back to linear =")
# Just to test, make a matrix that halves red, doubles green,
# adds 0.1 to blue.
ImageBufAlgo.channel_sum(b, ImageBuf("../oiiotool/tahoe-small.tif"),
(.2126, .7152, .0722))
write(b, "chsum.tif", oiio.UINT8)
# premult/unpremult
b = make_constimage(100, 100, 4, oiio.FLOAT, (.1, .1, .1, 1))
ImageBufAlgo.fill(b, (.2, .2, .2, .5), oiio.ROI(50, 80, 50, 80))
ImageBufAlgo.unpremult(b, b)
write(b, "unpremult.tif")
ImageBufAlgo.premult(b, b)
write(b, "premult.tif")
b = ImageBuf("../oiiotool/tahoe-small.tif")
ImageBufAlgo.rangecompress(b, b)
write(b, "rangecompress.tif", oiio.UINT8)
ImageBufAlgo.rangeexpand(b, b)
write(b, "rangeexpand.tif", oiio.UINT8)
# FIXME - colorconvert, ociolook need tests
# computePixelStats
compresults = oiio.CompareResults()
ImageBufAlgo.compare(ImageBuf("flip.tif"), ImageBuf("flop.tif"), 1.0e-6,
1.0e-6, compresults)
print "Comparison: of flip.tif and flop.tif"
print " mean =", compresults.meanerror
print " rms =", compresults.rms_error
print " PSNR =", compresults.PSNR
print " max =", compresults.maxerror
print " max @", (compresults.maxx, compresults.maxy, compresults.maxz,
b = ImageBufAlgo.unpremult (b)
write (b, "unpremult.tif")
b = ImageBufAlgo.premult (b)
write (b, "premult.tif")
b = ImageBufAlgo.contrast_remap (tahoetiny, black=0.1, white=0.75)
write (b, "contrast-stretch.tif")
b = ImageBufAlgo.contrast_remap (tahoetiny, min=0.1, max=0.75)
write (b, "contrast-shrink.tif")
b = ImageBufAlgo.contrast_remap (tahoetiny, scontrast=5.0)
write (b, "contrast-sigmoid5.tif")
b = ImageBuf ("../oiiotool/src/tahoe-small.tif")
b = ImageBufAlgo.rangecompress (b)
write (b, "rangecompress.tif", oiio.UINT8)
b = ImageBufAlgo.rangeexpand (b)
write (b, "rangeexpand.tif", oiio.UINT8)
# FIXME - colorconvert, ociolook need tests
# computePixelStats
b = ImageBuf ("../oiiotool/src/tahoe-small.tif")
stats = ImageBufAlgo.computePixelStats (b)
print ("Stats for tahoe-small.tif:")
print (" min = ", stats.min)
print (" max = ", stats.max)
print (" avg = ", stats.avg)
print (" stddev = ", stats.stddev)
print (" nancount = ", stats.nancount)
print (" infcount = ", stats.infcount)
print (" finitecount = ", stats.finitecount)
