Merge 84c5ea4 into 282b59e

REQUIRE

@@ -3,3 +3,4 @@ FITSIO 0.12
 FileIO
 Images
 RecipesBase
+Interact

src/AstroImages.jl

@@ -2,9 +2,9 @@ __precompile__()
 
 module AstroImages
 
-using FITSIO, FileIO, Images
+using FITSIO, FileIO, Images, Interact
 
-export load, AstroImage
+export load, AstroImage, visualize
 
 
 """
@@ -76,4 +76,22 @@ Base.convert(::Type{Matrix{C}}, img::AstroImage{T,C}) where {T,C<:Color} = rende
 include("showmime.jl")
 include("plot-recipes.jl")
 
+"""
+    visualize(image::AstroImage)
+
+Visualize the fits image by changing the brightness and contrast of image.
+Also, threshold filters out(remove) pixels less than it's value.
+"""
+function visualize(img::AstroImage{T,C}) where {T,C}
+    @manipulate for brightness  in 0:255, contrast in 1:1000, threshold in 1:255
+        tmp = img.data/255
+     @. tmp = (tmp * contrast) + brightness/255
+
+        for ind in eachindex(tmp)
+            tmp[ind] = tmp[ind] >= threshold/255 ? tmp[ind] : 0 
+        end
+        colorview(Gray, tmp)             # Currently for GrayScale images only
+    end
+end
+
 end # module