stub in denoising function. webcam isnt working

1 files changed, 31 insertions, 2 deletions

diff --git a/js/photo.js b/js/photo.js
index e1b8079..566a50d 100644
--- a/js/photo.js
+++ b/js/photo.js
@@ -154,13 +154,40 @@ var Photo = (function(){
         pixel[1] = data[t+1]
         pixel[2] = data[t+2]
         pixel[3] = data[t+3]
+        // if (Photo.denoise) { denoise_pixel(data, w, h, x, y, pixel, Photo.denoise) }
         row[j] = closest_to(pixel)
       }
     }
     if (! cb) return rows
     else cb (rows)
   }
-
+  function denoise_pixel (d, w, h, x, y, pixel, exponent){
+    var rr = r, gg = g, bb = b;
+    var color = [0,0,0]
+    var total = 0.0
+    var xx, yy, x0, y0, weight, r, g, b, t
+    for (xx = -4.0; xx <= 4.0; xx += 1.0) {
+      x0 = x+xx
+      if (x0 < 0 || x0 >= w) continue
+      for (yy = -4.0; yy <= 4.0; yy += 1.0) {
+        y0 = y+yy
+        if (y0 < 0 || y0 >= h) continue
+        t = (x+xx + w*(y+yy)) * 4
+        r = d[ t ]
+        g = d[ t+1 ]
+        b = d[ t+2 ]
+        weight = 1.0 - Math.abs( 0.25 * ((rr-r)/255 + (gg-g)/255 + (bb-b)/255) )
+        weight = pow( weight, exponent )
+        color[0] += r * weight
+        color[1] += g * weight
+        color[2] += b * weight
+        total += weight
+      }
+    }
+    pixel[0] = color[0] * 255 / total
+    pixel[1] = color[1] * 255 / total
+    pixel[2] = color[2] * 255 / total
+  }
   function getNaturalDimensions (img) {
     if (img.naturalWidth) {
       return { naturalWidth: img.naturalWidth, naturalHeight: img.naturalHeight }
@@ -255,7 +282,7 @@ var Photo = (function(){
     }, width)
   }
 
-  return {
+  var Photo = {
     colors: COLORS,
     hues: HUES,
     grays: GRAYS,
@@ -273,7 +300,9 @@ var Photo = (function(){
     asciiFromUrl: asciiFromUrl,
     ascii: ascii,
     neighbor: neighbor,
+    denoise: 0,
   }
+  return Photo
 
 })()