diff --git a/src/Images.jl b/src/Images.jl
index 0a8b72c8..a0498347 100644
--- a/src/Images.jl
+++ b/src/Images.jl
@@ -84,7 +84,6 @@ using TiledIteration: EdgeIterator
 include("misc.jl")
 include("labeledarrays.jl")
 include("algorithms.jl")
-include("exposure.jl")
 include("deprecations.jl")
 include("corner.jl")
 include("edge.jl")
@@ -152,7 +151,6 @@ export
     clearborder,
 
     #Exposure
-    complement,
     imhist,
     histeq,
     adjust_gamma,
diff --git a/src/algorithms.jl b/src/algorithms.jl
index 347703e5..d5ead017 100644
--- a/src/algorithms.jl
+++ b/src/algorithms.jl
@@ -1,7 +1,7 @@
 using Base: axes1, tail
 using OffsetArrays
 import Statistics
-using Statistics: mean, var
+using Statistics: mean
 import AxisArrays
 using ImageMorphology: dilate!, erode!
 
@@ -76,26 +76,6 @@ function sumfinite!(S, K, A::AbstractArray{T,N}) where {T,N}
 end
 _newindexer(ax) = Base.Broadcast.shapeindexer(ax)
 
-function Statistics.var(A::AbstractArray{C}; kwargs...) where C<:AbstractGray
-    imgc = channelview(A)
-    base_colorant_type(C)(var(imgc; kwargs...))
-end
-
-function Statistics.var(A::AbstractArray{C,N}; kwargs...) where {C<:Colorant,N}
-    imgc = channelview(A)
-    colons = ntuple(d->Colon(), Val(N))
-    inds1 = axes(imgc, 1)
-    val1 = Statistics.var(view(imgc, first(inds1), colons...); kwargs...)
-    vals = similar(imgc, typeof(val1), inds1)
-    vals[1] = val1
-    for i in first(inds1)+1:last(inds1)
-        vals[i] = Statistics.var(view(imgc, i, colons...); kwargs...)
-    end
-    base_colorant_type(C)(vals...)
-end
-
-Statistics.std(A::AbstractArray{C}; kwargs...) where {C<:Colorant} = mapc(sqrt, Statistics.var(A; kwargs...))
-
 # Entropy for grayscale (intensity) images
 function _log(kind::Symbol)
     if kind == :shannon
diff --git a/src/exposure.jl b/src/exposure.jl
deleted file mode 100644
index 56143b05..00000000
--- a/src/exposure.jl
+++ /dev/null
@@ -1,13 +0,0 @@
-# This functionality ought to be moved to another package.
-# Perhaps ImageMorphology.jl ?
-
-"""
-    y = complement(x)
-
-Take the complement `1-x` of `x`.  If `x` is a color with an alpha channel,
-the alpha channel is left untouched. Don't forget to add a dot when `x` is
-an array: `complement.(x)`
-"""
-complement(x::Union{Number,Colorant}) = oneunit(x)-x
-complement(x::TransparentColor) = typeof(x)(complement(color(x)), alpha(x))
-@deprecate complement(x::AbstractArray) complement.(x)
diff --git a/test/algorithms.jl b/test/algorithms.jl
index 06eb4933..cb3fd3e5 100644
--- a/test/algorithms.jl
+++ b/test/algorithms.jl
@@ -67,14 +67,6 @@ using Test
 
     Random.seed!(1234)
 
-    @testset "Complement" begin
-        @test complement.([Gray(0.2)]) == [Gray(0.8)]
-        @test complement.([Gray{N0f8}(0.2)]) == [Gray{N0f8}(0.8)]
-        @test complement.([RGB(0,0.3,1)]) == [RGB(1,0.7,0)]
-        @test complement.([RGBA(0,0.3,1,0.7)]) == [RGBA(1.0,0.7,0.0,0.7)]
-        @test complement.([RGBA{N0f8}(0,0.6,1,0.7)]) == [RGBA{N0f8}(1.0,0.4,0.0,0.7)]
-    end
-
     @testset "Entropy" begin
         img = rand(1:10,10,10)
         img2 = rand(1:2,10,10)
diff --git a/test/exposure.jl b/test/exposure.jl
index f0de92c7..85a461c0 100644
--- a/test/exposure.jl
+++ b/test/exposure.jl
@@ -515,11 +515,6 @@ eye(m,n) = Matrix{Float64}(I,m,n)
         @test eltype(imadjustintensity(img)) == Gray{N0f16}
 
         img = Gray{N0f16}.([0.01164 0.01118; 0.01036 0.01187])
-        @test complement(Gray(0.5)) == Gray(0.5)
-        @test complement(Gray(0.2)) == Gray(0.8)
-        @test all(complement.(img) .== 1 .- img)
-        # deprecated (#690)
-        @test all(complement.(img) .== 1 .- img)
 
         hist = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]