diff --git a/matlab/+SSF/quantize8.m b/matlab/+SSF/quantize8.m
index 19cb715d54f6792ecc8917b10fb14a564292fb1f..5921f9b3c2a745562199febfbdedffdcedc004f5 100644
--- a/matlab/+SSF/quantize8.m
+++ b/matlab/+SSF/quantize8.m
@@ -4,11 +4,11 @@ function [im, clipLimits] = quantize8(im_in,clipLimits)
 if isa(im,'uint8')
     return
 end
-
+im = im_in;
 for c = 1:size(im,4)
-    im(:,:,:,c) = max(im_in(:,:,:,c),clipLimits(c,1));
-    im(:,:,:,c) = min(im_in(:,:,:,c),clipLimits(c,2));
-    im(:,:,:,c) = (im_in(:,:,:,c) - clipLimits(c,1)) ./ (clipLimits(c,2) - clipLimits(c,1));
+    im(:,:,:,c) = max(im(:,:,:,c),clipLimits(c,1));
+    im(:,:,:,c) = min(im(:,:,:,c),clipLimits(c,2));
+    im(:,:,:,c) = (im(:,:,:,c) - clipLimits(c,1)) ./ (clipLimits(c,2) - clipLimits(c,1));
 end
 im = im2uint8(im);
 im(0 == im_in) = 0;
\ No newline at end of file