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Add function to an 'id' attrib when using the DecisionTreeClassifier #93

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joa-quim merged 1 commit into from
May 20, 2026
Merged

Add function to an 'id' attrib when using the DecisionTreeClassifier #93

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48 changes: 35 additions & 13 deletions src/utils.jl
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Original file line number Diff line number Diff line change
Expand Up @@ -119,7 +119,7 @@ end

# ----------------------------------------------------------------------------------------------------------
# This method fall into the description of the general 'truecolor(bndR, bndG, bndB)'
function truecolor(bandR::T, bandG::T, bandB::T) where {T<:Union{GMTgrid{<:AbstractFloat, 2},Matrix{<:AbstractFloat}}}
function truecolor(bandR::T, bandG::T, bandB::T) where {T<:Union{GMT.GMTgrid{<:AbstractFloat, 2},Matrix{<:AbstractFloat}}}
@assert size(bandR) == size(bandG) == size(bandB)
n1 = length(bandR); n2 = 2 * n1; n3 = 3 * n1
img = Array{UInt8}(undef, size(bandR,1), size(bandR,2), 3)
Expand All @@ -140,39 +140,42 @@ function truecolor(bandR::T, bandG::T, bandB::T) where {T<:Union{GMTgrid{<:Abstr
return isa(bandR, GMTgrid) ? mat2img(img, bandR) : mat2img(img)
end

truecolor(cube::GMT.GMTimage{UInt16, 3}, layers::Vector{Int}) = truecolor(cube, layers=layers)
function truecolor(cube::GMT.GMTimage{UInt16, 3}; layers::Vector{Int}=Int[])
truecolor(cube::GMT.GMTimage{UInt16, 3}, layers::Vector{Int}; stretch=true) = truecolor(cube, layers=layers, stretch=stretch)
function truecolor(cube::GMT.GMTimage{UInt16, 3}; layers::Vector{Int}=Int[], stretch=true)
(length(layers) != 3) && error("For an RGB composition 'bands' must be a 3 elements array and not $(length(layers))")
(cube.layout[3] != 'B') && error("For an RGB composition the image object must be Band interleaved and not $(cube.layout)")
img = Array{UInt8, 3}(undef, size(cube,1), size(cube,2), 3)
layers = find_layers(cube, layers, 3)
_ = mat2img(@view(cube[:,:,layers[1]]), stretch=true, img8=view(img,:,:,1), scale_only=1)
_ = mat2img(@view(cube[:,:,layers[2]]), stretch=true, img8=view(img,:,:,2), scale_only=1)
_ = mat2img(@view(cube[:,:,layers[3]]), stretch=true, img8=view(img,:,:,3), scale_only=1)
stch = (stretch == 1) ? true : stretch # This bloody type unstable and does not test stupid inputs
_ = mat2img(@view(cube[:,:,layers[1]]), stretch=stch, img8=view(img,:,:,1), scale_only=1)
_ = mat2img(@view(cube[:,:,layers[2]]), stretch=stch, img8=view(img,:,:,2), scale_only=1)
_ = mat2img(@view(cube[:,:,layers[3]]), stretch=stch, img8=view(img,:,:,3), scale_only=1)
Io = mat2img(img, cube); Io.layout = "TRBa"
Io
end

truecolor(cube::GMT.GMTgrid{Float32, 3}, layers::Vector{Int}) = truecolor(cube, layers=layers)
truecolor(cube::GMT.GMTgrid{Float32, 3}, layers::Vector{Int}; stretch=true) = truecolor(cube, layers=layers, stretch=stretch)
function truecolor(cube::GMT.GMTgrid{Float32, 3}; bands::Vector{Int}=Int[], layers::Vector{Int}=Int[],
bandnames::Vector{String}=String[], type::DataType=UInt8)
bandnames::Vector{String}=String[], stretch=true, type::DataType=UInt8)
(isempty(bands) && isempty(bandnames) && isempty(layers)) && (bandnames = ["red", "green", "blue"])
isempty(layers) && (layers = find_layers(cube, bandnames, bands))
(length(layers) != 3) && error("For an RGB composition 'bands' must be a 3 elements array and not $(length(layers))")
stch = (stretch == 1) ? true : stretch # This bloody type unstable and does not test stupid inputs
img = Array{type, 3}(undef, size(cube,1), size(cube,2), 3)
img[:,:,1] = rescale(@view(cube[:,:,layers[1]]), stretch=true, type=type)
img[:,:,2] = rescale(@view(cube[:,:,layers[2]]), stretch=true, type=type)
img[:,:,3] = rescale(@view(cube[:,:,layers[3]]), stretch=true, type=type)
img[:,:,1] = rescale(@view(cube[:,:,layers[1]]), stretch=stch, type=type)
img[:,:,2] = rescale(@view(cube[:,:,layers[2]]), stretch=stch, type=type)
img[:,:,3] = rescale(@view(cube[:,:,layers[3]]), stretch=stch, type=type)
Io = mat2img(img, cube); Io.layout = "TRBa"
Io
end

function truecolor(cube::String; bands::Vector{Int}=Int[], layers::Vector{Int}=Int[], bandnames::Vector{String}=String[], raw::Bool=false)
function truecolor(cube::String; bands::Vector{Int}=Int[], layers::Vector{Int}=Int[], bandnames::Vector{String}=String[],
raw::Bool=false, stretch=true)
# The `raw` option returns a GMTimage{UInt16, 3} and does not convert to UInt8 with auto-stretch (default)
(isempty(bands) && isempty(bandnames) && isempty(layers)) && (bandnames = ["red", "green", "blue"])
rgb = subcube(cube, bands=bands, layers=layers, bandnames=bandnames)
(raw) && return rgb
return (eltype(rgb) <: AbstractFloat) ? truecolor(rgb, layers=[1,2,3]) : mat2img(rgb, stretch=:auto)
return (eltype(rgb) <: AbstractFloat) ? truecolor(rgb, layers=[1,2,3], stretch=stretch) : mat2img(rgb, stretch=stretch)
end

# ----------------------------------------------------------------------------------------------------------
Expand Down Expand Up @@ -850,6 +853,9 @@ Returns the trained model and the class names.
"""
function train_raster(cube::GItype, train::Union{Vector{<:GMTdataset}, String}; np::Int=0, density=0.1, max_depth=3)
samples = isa(train, String) ? gmtread(train) : train
get(samples[1].attrib, "class", "") == "" && error("The datasets used for training MUST have an attribute called 'class'.")
(get(samples[1].attrib, "id", "") == "") && add_class_id!(samples) # If no 'id' attribute, create one from 'class'

pts = randinpolygon(samples, np=np, density=density)
LCsamp = grdinterpolate(cube, S=pts, nocoords=true)
features = GMT.ds2ds(LCsamp)
Expand All @@ -861,6 +867,22 @@ function train_raster(cube::GItype, train::Union{Vector{<:GMTdataset}, String};
return model, classes
end

function add_class_id!(D::Vector{<:GMTdataset})
seen = Dict{String,Int}()
n = 0
for d in D
v = d.attrib["class"]
cls = v isa Vector ? first(v) : v
haskey(seen, cls) || (n += 1; seen[cls] = n)
end
for d in D
v = d.attrib["class"]
cls = v isa Vector ? first(v) : v
d.attrib["id"] = string(seen[cls])
end
return nothing
end

# ----------------------------------------------------------------------------------------------------------
#=
From https://rspatial.org/rs/5-supclassification.html
Expand Down
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