MWE:
using OpenCV
using ImageCore
img = rand(RGB{N0f8}, 100, 200)
_, data = OpenCV.imencode(".jpg", collect(rawview(channelview(img)))) # data is a Vector{UInt8}
OpenCV.imdecode(data, -1)throws the following error.
ERROR: MethodError: no method matching imdecode(::Vector{UInt8}, ::Int64)
The function `imdecode` exists, but no method is defined for this combination of argument types.
Closest candidates are:
imdecode(::Union{OpenCV.CxxMat, AbstractArray{T, 3} where T<:Union{Float32, Float64, Int16, Int32, Int8, UInt16, UInt8}}, ::Int64)
@ OpenCV ~/.julia/artifacts/12890b1eaf53ee776ede25d1cb4b8dba6d1a55ab/OpenCV/src/cv_cxx_wrap.jl:2123
Stacktrace:
[1] top-level scope
@ REPL[13]:1Why the first argument, which is a byte array, represented as a 3D array?
Julia and package versions:
julia> versioninfo()
Julia Version 1.11.3
Commit d63adeda50d (2025-01-21 19:42 UTC)
Build Info:
Official https://julialang.org/ release
Platform Info:
OS: macOS (arm64-apple-darwin24.0.0)
CPU: 10 × Apple M1 Max
WORD_SIZE: 64
LLVM: libLLVM-16.0.6 (ORCJIT, apple-m1)
Threads: 1 default, 0 interactive, 1 GC (on 8 virtual cores)
(jl_JUYJaI) pkg> st
Status `/private/var/folders/ss/xkdtgy8n4rs0jtwqygpb2dch0000gn/T/jl_JUYJaI/Project.toml`
[a09fc81d] ImageCore v0.10.5
[f878e3a2] OpenCV v4.6.1
(jl_JUYJaI) pkg> st --manifest
Status `/private/var/folders/ss/xkdtgy8n4rs0jtwqygpb2dch0000gn/T/jl_JUYJaI/Manifest.toml`
[3da002f7] ColorTypes v0.12.0
[c3611d14] ColorVectorSpace v0.11.0
[5ae59095] Colors v0.13.0
[1f15a43c] CxxWrap v0.16.2
[5789e2e9] FileIO v1.17.0
[53c48c17] FixedPointNumbers v0.8.5
[a09fc81d] ImageCore v0.10.5
[692b3bcd] JLLWrappers v1.7.0
[1914dd2f] MacroTools v0.5.15
[dbb5928d] MappedArrays v0.4.2
[e94cdb99] MosaicViews v0.3.4
[6fe1bfb0] OffsetArrays v1.15.0
[f878e3a2] OpenCV v4.6.1
[5432bcbf] PaddedViews v0.5.12
[aea7be01] PrecompileTools v1.2.1
[21216c6a] Preferences v1.4.3
[189a3867] Reexport v1.2.2
[ae029012] Requires v1.3.1
[cae243ae] StackViews v0.1.1
[10745b16] Statistics v1.11.1
[62fd8b95] TensorCore v0.1.1
[6e34b625] Bzip2_jll v1.0.9+0
[2702e6a9] EpollShim_jll v0.0.20230411+1
[2e619515] Expat_jll v2.6.5+0
[a3f928ae] Fontconfig_jll v2.15.0+0
[d7e528f0] FreeType2_jll v2.13.3+1
[78b55507] Gettext_jll v0.21.0+0
[7746bdde] Glib_jll v2.82.4+0
⌅ [e9f186c6] Libffi_jll v3.2.2+2
[d4300ac3] Libgcrypt_jll v1.11.0+0
[7e76a0d4] Libglvnd_jll v1.7.0+0
[7add5ba3] Libgpg_error_jll v1.51.1+0
[94ce4f54] Libiconv_jll v1.18.0+0
[4b2f31a3] Libmount_jll v2.40.3+0
[38a345b3] Libuuid_jll v2.40.3+0
[33b9d88c] OpenCV_jll v4.10.0+0
[458c3c95] OpenSSL_jll v3.0.16+0
⌅ [c0090381] Qt6Base_jll v6.7.1+1
[a44049a8] Vulkan_Loader_jll v1.3.243+0
[a2964d1f] Wayland_jll v1.21.0+2
[2381bf8a] Wayland_protocols_jll v1.36.0+0
[02c8fc9c] XML2_jll v2.13.6+1
[aed1982a] XSLT_jll v1.1.42+0
[f67eecfb] Xorg_libICE_jll v1.1.1+0
[c834827a] Xorg_libSM_jll v1.2.4+0
[4f6342f7] Xorg_libX11_jll v1.8.6+3
[0c0b7dd1] Xorg_libXau_jll v1.0.12+0
[a3789734] Xorg_libXdmcp_jll v1.1.5+0
[1082639a] Xorg_libXext_jll v1.3.6+3
[ec84b674] Xorg_libXrandr_jll v1.5.4+0
[ea2f1a96] Xorg_libXrender_jll v0.9.11+1
[14d82f49] Xorg_libpthread_stubs_jll v0.1.2+0
[c7cfdc94] Xorg_libxcb_jll v1.17.0+3
[cc61e674] Xorg_libxkbfile_jll v1.1.2+1
[e920d4aa] Xorg_xcb_util_cursor_jll v0.1.4+0
[12413925] Xorg_xcb_util_image_jll v0.4.0+1
[2def613f] Xorg_xcb_util_jll v0.4.0+1
[975044d2] Xorg_xcb_util_keysyms_jll v0.4.0+1
[0d47668e] Xorg_xcb_util_renderutil_jll v0.3.9+1
[c22f9ab0] Xorg_xcb_util_wm_jll v0.4.1+1
[35661453] Xorg_xkbcomp_jll v1.4.6+1
[33bec58e] Xorg_xkeyboard_config_jll v2.39.0+0
[c5fb5394] Xorg_xtrans_jll v1.5.1+0
[35ca27e7] eudev_jll v3.2.9+0
[1a1c6b14] gperf_jll v3.1.1+1
⌅ [3eaa8342] libcxxwrap_julia_jll v0.13.4+0
[2db6ffa8] libevdev_jll v1.11.0+0
[36db933b] libinput_jll v1.18.0+0
[009596ad] mtdev_jll v1.1.6+0
[d8fb68d0] xkbcommon_jll v1.4.1+2
[0dad84c5] ArgTools v1.1.2
[56f22d72] Artifacts v1.11.0
[2a0f44e3] Base64 v1.11.0
[ade2ca70] Dates v1.11.0
[f43a241f] Downloads v1.6.0
[7b1f6079] FileWatching v1.11.0
[b27032c2] LibCURL v0.6.4
[76f85450] LibGit2 v1.11.0
[8f399da3] Libdl v1.11.0
[37e2e46d] LinearAlgebra v1.11.0
[56ddb016] Logging v1.11.0
[d6f4376e] Markdown v1.11.0
[ca575930] NetworkOptions v1.2.0
[44cfe95a] Pkg v1.11.0
[de0858da] Printf v1.11.0
[9a3f8284] Random v1.11.0
[ea8e919c] SHA v0.7.0
[fa267f1f] TOML v1.0.3
[a4e569a6] Tar v1.10.0
[cf7118a7] UUIDs v1.11.0
[4ec0a83e] Unicode v1.11.0
[e66e0078] CompilerSupportLibraries_jll v1.1.1+0
[deac9b47] LibCURL_jll v8.6.0+0
[e37daf67] LibGit2_jll v1.7.2+0
[29816b5a] LibSSH2_jll v1.11.0+1
[c8ffd9c3] MbedTLS_jll v2.28.6+0
[14a3606d] MozillaCACerts_jll v2023.12.12
[4536629a] OpenBLAS_jll v0.3.27+1
[efcefdf7] PCRE2_jll v10.42.0+1
[83775a58] Zlib_jll v1.2.13+1
[8e850b90] libblastrampoline_jll v5.11.0+0
[8e850ede] nghttp2_jll v1.59.0+0
[3f19e933] p7zip_jll v17.4.0+2
Info Packages marked with ⌅ have new versions available but compatibility constraints restrict them from upgrading. To see why use `status --outdated -m`
MWE:
throws the following error.
Why the first argument, which is a byte array, represented as a 3D array?
Julia and package versions: