June 2018 Update

Task/Bitmap-Histogram/Julia/bitmap-histogram.julia

@@ -1,15 +1,9 @@
-using Color, Images, FixedPointNumbers
+using Images, FileIO
 
-ima = imread("bitmap_histogram_in.jpg")
-imb = convert(Image{Gray{Ufixed8}}, ima)
+ima = load("data/lenna50.jpg")
+imb = Gray.(ima)
 
-# calculate histogram
-a = map(x->x.val.i, imb.data)
-(nothing, h) = hist(reshape(a, length(a)), -1:typemax(Uint8))
-
-g = float(imb.data)
-b = g .> median(g)
-fill!(imb, Gray(0.0))
-imb[b] = Gray(1.0)
-
-imwrite(imb, "bitmap_histogram_out.png")
+medcol = median(imb)
+imb[imb .≤ medcol] = Gray(0.0)
+imb[imb .> medcol] = Gray(1.0)
+save("data/lennaGray.jpg", imb)