From edb6a0e889886c958c908a61a38d8a0953efcf00 Mon Sep 17 00:00:00 2001
From: Tauranis <rodrigodefreitas12@gmail.com>
Date: Tue, 12 Apr 2016 08:28:38 -0300
Subject: [PATCH] Bug fix for MLP predict for small values to avoid nan
 responses.

---
 modules/ml/src/ann_mlp.cpp | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/modules/ml/src/ann_mlp.cpp b/modules/ml/src/ann_mlp.cpp
index 19ee913..8974b6b 100644
--- a/modules/ml/src/ann_mlp.cpp
+++ b/modules/ml/src/ann_mlp.cpp
@@ -432,8 +432,15 @@ public:
                     double* data = sums.ptr<double>(i);
                     for( j = 0; j < cols; j++ )
                     {
-                        double t = scale2*(1. - data[j])/(1. + data[j]);
-                        data[j] = t;
+                        if(!cvIsInf(data[j]))
+                        {
+                            double t = scale2*(1. - data[j])/(1. + data[j]);
+                            data[j] = t;
+                        }
+                        else
+                        {
+                            data[j] = -scale2;
+                        }
                     }
                 }
                 break;
-- 
2.7.4