Is packbits compression supported?

[jessjaco]

Does TiffImages support packbits compression? It's part of the 6.0 baseline spec but I can't seem to open a packbits compressed file.

[tlnagy]

Sorry for the delayed response, but basic packbits compressed images are supported:

TiffImages.jl/src/compression.jl

Lines 12 to 29 in 562225e

	function Base.read!(tf::TiffFile, arr::AbstractArray{T, N}, ::Val{COMPRESSION_PACKBITS}) where {T, N}
	pos = 1
	nbit = Array{Int8}(undef, 1)
	nxt = Array{T}(undef, 1)
	while pos < length(arr)
	read!(tf, nbit)
	n = nbit[1]
	if 0 <= n <= 127
	read!(tf, view(arr, pos:pos+n))
	pos += n
	elseif -127 <= n <= -1
	read!(tf, nxt)
	arr[pos:(pos-n)] .= nxt[1]
	pos += -n
	end
	pos += 1
	end
	end

Did you get an error message when you loaded the image? Could you share that? If you want, you can send me a link to an example TIFF file to the email listed on my profile page and I could take a look.