debugging

demo.jl

@@ -29,7 +29,7 @@ function test(mats)
             frame = @view mat[:, :, i]
             imfilter!(r_noncached, f2, frame, kernel)
             imfilter!(r_cached, f1, frame, kernel)
-            @show f1[1, 1], f2[1, 1]
+            @show f1[1:2, 1:2] f2[1:2, 1:2]
             all(f1 .≈ f2) || error("f1 !≈ f2")
         end
         return

src/imfilter.jl

@@ -872,15 +872,22 @@ function planned_fft(A::AbstractArray{T,N},
 end
 
 function filtfft(A, krn, planned_rfft1::Function, planned_rfft2::Function, planned_irfft::Function)
-    B = planned_rfft1(A)
-    complex(B) .*= conj!(complex(planned_rfft2(krn)))
-    return real(planned_irfft(complex(B)))
+    B = complex(planned_rfft1(A)) * FFTW.AbstractFFTs.to1(A)
+    _B = rfft(A)
+    @show B[1:4] _B[1:4]
+    B .*= conj!(complex(planned_rfft2(krn)))
+    out = irfft(B, length(axes(A, 1)))
+    @show complex(B)[1:2,1:2] axes(complex(B)) out[1:2,1:2]
+    return out
+    # return real(planned_irfft(complex(B)))
 end
 filtfft(A, krn, ::Nothing, ::Nothing, ::Nothing) = filtfft(A, krn)
 function filtfft(A, krn)
     B = rfft(A)
     B .*= conj!(rfft(krn))
-    irfft(B, length(axes(A, 1)))
+    out = irfft(B, length(axes(A, 1)))
+    @show B[1:2,1:2] axes(B) out[1:2,1:2]
+    return out
 end
 function filtfft(A::AbstractArray{C}, krn) where {C<:Colorant}
     Av, dims = channelview_dims(A)