From 64abcc0603526055069956fdc324293fd28d5fa1 Mon Sep 17 00:00:00 2001
From: Eric Wait <eric@waitphoto.com>
Date: Thu, 30 Mar 2017 16:26:48 -0400
Subject: [PATCH] Auto transfer function will deal with blank or bright images
---
src/matlab/+D3d/+UI/AutoTransferFunction.m | 19 +++++++++++++++++--
1 file changed, 17 insertions(+), 2 deletions(-)
diff --git a/src/matlab/+D3d/+UI/AutoTransferFunction.m b/src/matlab/+D3d/+UI/AutoTransferFunction.m
index e037d5b..c4f3afc 100644
--- a/src/matlab/+D3d/+UI/AutoTransferFunction.m
+++ b/src/matlab/+D3d/+UI/AutoTransferFunction.m
@@ -5,15 +5,30 @@ function AutoTransferFunction(im)
for c=1:size(im,4)
curIm = imC(:,:,:,c,:);
+ if (nnz(curIm(:))==0)
+ lb(c) = 0;
+ ub(c) = 255;
+ continue
+ end
N = histcounts(curIm(curIm>0),255);
forwardSum = cumsum(N);
lowerBound = forwardSum > sum(N)*0.05;
- lb(c) = find(lowerBound,1,'first');
+ l = find(lowerBound,1,'first');
+ if (isempty(l))
+ lb(c) = 0;
+ else
+ lb(c) = l;
+ end
reverseSum = cumsum(N,'reverse');
upperBound = reverseSum < sum(N)*0.005;
- ub(c) = find(upperBound,1,'first');
+ u = find(upperBound,1,'first');
+ if (isempty(u))
+ ub(c) = 255;
+ else
+ ub(c) = u;
+ end
end
[imageData, ucolors, channelData] = D3d.UI.Ctrl.GetUserData();
--
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