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hhrutter and nigeltao tiff: Add support for CCITT group 3/4 compression
The algorithm is described at https://www.itu.int/rec/T-REC-T.6/en

Fixes golang/go#19443

Change-Id: Ib8a078ab43c78d1f58d2ac849ed455b05dc209e9
Reviewed-on: https://go-review.googlesource.com/c/image/+/174139
Reviewed-by: Benny Siegert <bsiegert@gmail.com>
Reviewed-by: Nigel Tao <nigeltao@golang.org>
Run-TryBot: Benny Siegert <bsiegert@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Latest commit 7e034ca Jun 18, 2019
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blue-purple-pink-large.lossless.webp
blue-purple-pink-large.no-filter.lossy.webp
blue-purple-pink-large.no-filter.lossy.webp.ycbcr.png
blue-purple-pink-large.normal-filter.lossy.webp
blue-purple-pink-large.normal-filter.lossy.webp.ycbcr.png
blue-purple-pink-large.png
blue-purple-pink-large.simple-filter.lossy.webp
blue-purple-pink-large.simple-filter.lossy.webp.ycbcr.png
blue-purple-pink.lossless.webp
blue-purple-pink.lossy.webp
blue-purple-pink.lossy.webp.ycbcr.png
blue-purple-pink.lzwcompressed.tiff
blue-purple-pink.png
bw-deflate.tiff
bw-gopher.png
bw-gopher_ccittGroup3.tiff
bw-gopher_ccittGroup4.tiff
bw-packbits.tiff
bw-uncompressed.tiff
colormap.bmp
colormap.png
go-turns-two-14x18.png
go-turns-two-280x360.jpeg
go-turns-two-down-ab.png
go-turns-two-down-bl.png
go-turns-two-down-cr.png
go-turns-two-down-nn.png
go-turns-two-rotate-ab.png
go-turns-two-rotate-bl.png
go-turns-two-rotate-cr.png
go-turns-two-rotate-nn.png
go-turns-two-up-ab.png
go-turns-two-up-bl.png
go-turns-two-up-cr.png
go-turns-two-up-nn.png
gopher-doc.1bpp.lossless.webp
gopher-doc.1bpp.png
gopher-doc.2bpp.lossless.webp
gopher-doc.2bpp.png
gopher-doc.4bpp.lossless.webp
gopher-doc.4bpp.png
gopher-doc.8bpp.lossless.webp
gopher-doc.8bpp.png
no_compress.tiff
no_rps.tiff
testpattern.png
tux-rotate-ab.png
tux-rotate-bl.png
tux-rotate-cr.png
tux-rotate-nn.png
tux.lossless.webp
tux.png
video-001-16bit.tiff
video-001-gray-16bit.tiff
video-001-gray.tiff
video-001-paletted.tiff
video-001-strip-64.tiff
video-001-tile-64x64.tiff
video-001-uncompressed.tiff
video-001.bmp
video-001.lossy.webp
video-001.lossy.webp.ycbcr.png
video-001.png
video-001.tiff
yellow_rose-small-v5.bmp
yellow_rose-small-v5.png
yellow_rose-small.bmp
yellow_rose-small.png
yellow_rose.lossless.webp
yellow_rose.lossy-with-alpha.webp
yellow_rose.lossy-with-alpha.webp.nycbcra.png
yellow_rose.lossy.webp
yellow_rose.lossy.webp.ycbcr.png
yellow_rose.png
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