diff --git a/doc/motionplus_config.html b/doc/motionplus_config.html
index a26abfdb..f8faf36a 100644
--- a/doc/motionplus_config.html
+++ b/doc/motionplus_config.html
@@ -1252,10 +1252,10 @@
           </div>
 
           <div>
-            <i><h4> imagetype </h4></i>
+            <i><h4> image_type </h4></i>
             <ul>
-              <li> Values: full, roi | Default: full </li>
-              Process full image or just the region of interest(roi).
+              <li> Values: full, grey, roi | Default: full </li>
+              Process full color image, the full grey image or just the region of interest(roi).
             </ul>
             <p></p>
           </div>
diff --git a/src/alg_sec.cpp b/src/alg_sec.cpp
index a12cb68b..98f27edd 100644
--- a/src/alg_sec.cpp
+++ b/src/alg_sec.cpp
@@ -226,10 +226,10 @@ static void algsec_image_type(ctx_cam *cam, Mat &mat_dst)
 {
     ctx_algsec_model *algmdl = &cam->algsec->models;
 
-    if ((algmdl->imagetype == "gray") || (algmdl->imagetype == "grey")) {
+    if ((algmdl->image_type == "gray") || (algmdl->image_type == "grey")) {
         mat_dst = Mat(cam->imgs.height, cam->imgs.width
             , CV_8UC1, (void*)cam->algsec->image_norm);
-    } else if (algmdl->imagetype == "roi") {
+    } else if (algmdl->image_type == "roi") {
         /*Discard really small and large images */
         if ((cam->current_image->location.width < 64) ||
             (cam->current_image->location.height < 64) ||
@@ -443,8 +443,8 @@ static void algsec_params_model(ctx_cam *cam)
             algmdl->model_file = param_vl;
         } else if (mystreq(param_nm,"frame_interval")) {
             algmdl->frame_interval = atoi(param_vl);
-        } else if (mystreq(param_nm,"imagetype")) {
-            algmdl->imagetype = param_vl;
+        } else if (mystreq(param_nm,"image_type")) {
+            algmdl->image_type = param_vl;
         } else if (mystreq(param_nm,"threshold")) {
             algmdl->threshold = atof(param_vl);
         } else if (mystreq(param_nm,"threshold_model")) {
@@ -500,7 +500,7 @@ static void algsec_params_defaults(ctx_cam *cam)
 
     util_parms_add_default(algmdl->algsec_params, "model_file", "");
     util_parms_add_default(algmdl->algsec_params, "frame_interval", "5");
-    util_parms_add_default(algmdl->algsec_params, "imagetype", "full");
+    util_parms_add_default(algmdl->algsec_params, "image_type", "full");
     util_parms_add_default(algmdl->algsec_params, "rotate", "0");
 
     if (algmdl->method == "haar") {
diff --git a/src/alg_sec.hpp b/src/alg_sec.hpp
index 03e5b511..27334f6e 100644
--- a/src/alg_sec.hpp
+++ b/src/alg_sec.hpp
@@ -39,7 +39,7 @@ struct ctx_algsec_model {
     int                         frame_interval;
 
     std::string                 method;
-    std::string                 imagetype;
+    std::string                 image_type;
     int                         rotate;
 
     float                       scalefactor;