diff --git a/rtdata/languages/default b/rtdata/languages/default
index 3643bd654..4d999491a 100644
--- a/rtdata/languages/default
+++ b/rtdata/languages/default
@@ -1128,6 +1128,8 @@ HISTORY_MSG_888;Local - Contrast Wavelet Balance Threshold
 HISTORY_MSG_889;Local - Contrast Wavelet Graduated Strength
 HISTORY_MSG_890;Local - Contrast Wavelet Graduated angle
 HISTORY_MSG_891;Local - Contrast Wavelet Graduated
+HISTORY_MSG_892;Local - Encoding log Graduated Strength
+HISTORY_MSG_893;Local - Encoding log Graduated angle
 HISTORY_MSG_CLAMPOOG;Clip out-of-gamut colors
 HISTORY_MSG_COLORTONING_LABGRID_VALUE;CT - Color correction
 HISTORY_MSG_COLORTONING_LABREGION_AB;CT - Color correction
@@ -2352,6 +2354,7 @@ TP_LOCALLAB_GRADANG;Gradient angle
 TP_LOCALLAB_GRADANG_TOOLTIP;Rotation angle in degrees : -180 0 +180
 TP_LOCALLAB_GRADFRA;Graduated Filter
 TP_LOCALLAB_GRADGEN_TOOLTIP;Graduated filter is supplied with Color and Light & merge file, Exposure & mask, Shadows Highlight, Vibrance.\n\nVibrance, Color and Light & merge file, are provided with GF luminance, chrominance, Hue.\nFeather is located in settings. 
+TP_LOCALLAB_GRADLOGFRA;Graduated Filter Luminance
 TP_LOCALLAB_GRADSTR;Gradient strength
 TP_LOCALLAB_GRADSTRAB_TOOLTIP;Filter chroma strength
 TP_LOCALLAB_GRADSTRCHRO;Gradient strength Chrominance
diff --git a/rtengine/iplocallab.cc b/rtengine/iplocallab.cc
index 427c2851e..35379433b 100644
--- a/rtengine/iplocallab.cc
+++ b/rtengine/iplocallab.cc
@@ -236,6 +236,8 @@ struct local_params {
     float angvib;
     float angwav;
     float strwav;
+    float anglog;
+    float strlog;
     float softradiusexp;
     float softradiuscol;
     float softradiuscb;
@@ -835,6 +837,8 @@ static void calcLocalParams(int sp, int oW, int oH, const LocallabParams& locall
     float angvib = ((float) locallab.spots.at(sp).angvib);
     float strwav = ((float) locallab.spots.at(sp).strwav);
     float angwav = ((float) locallab.spots.at(sp).angwav);
+    float strlog = ((float) locallab.spots.at(sp).strlog);
+    float anglog = ((float) locallab.spots.at(sp).anglog);
     float softradiusexpo = ((float) locallab.spots.at(sp).softradiusexp);
     float softradiuscolor = ((float) locallab.spots.at(sp).softradiuscol);
     float softradiusreti = ((float) locallab.spots.at(sp).softradiusret);
@@ -974,6 +978,8 @@ static void calcLocalParams(int sp, int oW, int oH, const LocallabParams& locall
     lp.angvib = angvib;
     lp.strwav = strwav;
     lp.angwav = angwav;
+    lp.strlog = strlog;
+    lp.anglog = anglog;
     lp.softradiusexp = softradiusexpo;
     lp.softradiuscol = softradiuscolor;
     lp.softradiusret = softradiusreti;
@@ -3009,6 +3015,9 @@ void calclocalGradientParams(const struct local_params& lp, struct grad_params&
     } else if (indic == 10) {
         stops = lp.strwav;
         angs = lp.angwav;
+    } else if (indic == 11) {
+        stops = lp.strlog;
+        angs = lp.anglog;
     }
 
 
@@ -9624,7 +9633,25 @@ void ImProcFunctions::Lab_Local(int call, int sp, float** shbuffer, LabImage * o
                 rgb2lab(*tmpImage, *bufexpfin, params->icm.workingProfile);
 
                 delete tmpImage;
+                //here begin graduated filter
+                //first solution "easy" but we can do other with log_encode...to see the results
+                if (lp.strlog != 0.f) {
+                    struct grad_params gplog;
+                    calclocalGradientParams(lp, gplog, ystart, xstart, bfw, bfh, 11);
+#ifdef _OPENMP
+                            #pragma omp parallel for schedule(dynamic,16)
+#endif
 
+                    for (int ir = 0; ir < bfh; ir++)
+                        for (int jr = 0; jr < bfw; jr++) {
+                            double factor = 1.0;
+                            factor = ImProcFunctions::calcGradientFactor(gplog, jr, ir);
+                            bufexpfin->L[ir][jr] *= factor;
+                        }
+                }
+                
+                
+                //end graduated
                 transit_shapedetect2(call, 11, bufexporig.get(), bufexpfin.get(), nullptr, hueref, chromaref, lumaref, sobelref, 0.f, nullptr, lp, original, transformed, cx, cy, sk);
 
                 if (params->locallab.spots.at(sp).recurs) {
diff --git a/rtengine/procevents.h b/rtengine/procevents.h
index a90305c1e..8d62b6e0f 100644
--- a/rtengine/procevents.h
+++ b/rtengine/procevents.h
@@ -917,6 +917,8 @@ enum ProcEventCode {
     Evlocallabstrwav = 888,
     Evlocallabangwav = 889,
     Evlocallabwavgradl = 890,
+    Evlocallabstrlog = 891,
+    Evlocallabanglog = 892,
     NUMOFEVENTS
 };
 
diff --git a/rtengine/procparams.cc b/rtengine/procparams.cc
index c458df2cd..4033f4a51 100644
--- a/rtengine/procparams.cc
+++ b/rtengine/procparams.cc
@@ -2815,7 +2815,9 @@ LocallabParams::LocallabSpot::LocallabSpot() :
     whiteEv(10.0),
     detail(0.6),
     sensilog(50),
-    baselog(2.)
+    baselog(2.),
+    strlog(0.0),
+    anglog(0.0)
 
 {
 }
@@ -3241,7 +3243,9 @@ bool LocallabParams::LocallabSpot::operator ==(const LocallabSpot& other) const
         && whiteEv == other.whiteEv
         && detail == other.detail
         && sensilog == other.sensilog
-        && baselog == other.baselog;
+        && baselog == other.baselog
+        && strlog == other.strlog
+        && anglog == other.anglog;
 
 }
 
@@ -4638,6 +4642,8 @@ int ProcParams::save(const Glib::ustring& fname, const Glib::ustring& fname2, bo
                 saveToKeyfile(!pedited || pedited->locallab.spots.at(i).detail, "Locallab", "Detail_" + std::to_string(i), spot.detail, keyFile);
                 saveToKeyfile(!pedited || pedited->locallab.spots.at(i).sensilog, "Locallab", "Sensilog_" + std::to_string(i), spot.sensilog, keyFile);
                 saveToKeyfile(!pedited || pedited->locallab.spots.at(i).baselog, "Locallab", "Baselog_" + std::to_string(i), spot.baselog, keyFile);
+                saveToKeyfile(!pedited || pedited->locallab.spots.at(i).strlog, "Locallab", "Strlog_" + std::to_string(i), spot.strlog, keyFile);
+                saveToKeyfile(!pedited || pedited->locallab.spots.at(i).anglog, "Locallab", "Anglog_" + std::to_string(i), spot.anglog, keyFile);
 
             }
         }
@@ -6203,6 +6209,8 @@ int ProcParams::load(const Glib::ustring& fname, ParamsEdited* pedited)
                 assignFromKeyfile(keyFile, "Locallab", "Detail_" + std::to_string(i), pedited, spot.detail, spotEdited.detail);
                 assignFromKeyfile(keyFile, "Locallab", "Sensilog_" + std::to_string(i), pedited, spot.sensilog, spotEdited.sensilog);
                 assignFromKeyfile(keyFile, "Locallab", "Baselog_" + std::to_string(i), pedited, spot.baselog, spotEdited.baselog);
+                assignFromKeyfile(keyFile, "Locallab", "Strlog_" + std::to_string(i), pedited, spot.strlog, spotEdited.strlog);
+                assignFromKeyfile(keyFile, "Locallab", "Anglog_" + std::to_string(i), pedited, spot.anglog, spotEdited.anglog);
 
 
                 locallab.spots.at(i) = spot;
diff --git a/rtengine/procparams.h b/rtengine/procparams.h
index dcc90bcee..909078d88 100644
--- a/rtengine/procparams.h
+++ b/rtengine/procparams.h
@@ -1359,6 +1359,8 @@ struct LocallabParams {
         double detail;
         int sensilog;
         double baselog;
+        double strlog;
+        double anglog;
 
 
         LocallabSpot();
diff --git a/rtengine/refreshmap.cc b/rtengine/refreshmap.cc
index 8bc79385d..3b4bca4e4 100644
--- a/rtengine/refreshmap.cc
+++ b/rtengine/refreshmap.cc
@@ -920,7 +920,9 @@ int refreshmap[rtengine::NUMOFEVENTS] = {
     LUMINANCECURVE,         //Evlocallabthreswav
     LUMINANCECURVE,         //Evlocallabstrwav
     LUMINANCECURVE,         //Evlocallabangwav
-    LUMINANCECURVE         //Evlocallabwavgradl
+    LUMINANCECURVE,         //Evlocallabwavgradl
+    LUMINANCECURVE,         //Evlocallabstrlog
+    LUMINANCECURVE         //Evlocallabanglog
 
 };
 
diff --git a/rtgui/locallab.cc b/rtgui/locallab.cc
index fe8d94554..eb771331d 100644
--- a/rtgui/locallab.cc
+++ b/rtgui/locallab.cc
@@ -650,6 +650,8 @@ whiteEv(Gtk::manage(new Adjuster(M("TP_LOCALLAB_WHITE_EV"), 0.0, 32.0, 0.1, 10.0
 detail(Gtk::manage(new Adjuster(M("TP_LOCALLAB_DETAIL"), 0., 1., 0.01, 0.6))),
 sensilog(Gtk::manage(new Adjuster(M("TP_LOCALLAB_SENSILOG"), 0, 100, 1, 50))),
 baselog(Gtk::manage(new Adjuster(M("TP_LOCALLAB_BASELOG"), 1.3, 8., 0.05, 2., Gtk::manage(new RTImage("circle-black-small.png")), Gtk::manage(new RTImage("circle-white-small.png"))))), 
+strlog(Gtk::manage(new Adjuster(M("TP_LOCALLAB_GRADSTR"), -2.0, 2.0, 0.05, 0.))),
+anglog(Gtk::manage(new Adjuster(M("TP_LOCALLAB_GRADANG"), -180, 180, 0.1, 0.))),
 
 // ButtonCheck widgets
 // Color & Light
@@ -786,6 +788,7 @@ compreFrame(Gtk::manage(new Gtk::Frame(M("TP_LOCALLAB_COMPREFRA")))),
 grainFrame(Gtk::manage(new Gtk::Frame(M("TP_LOCALLAB_GRAINFRA")))),
 logFrame(Gtk::manage(new Gtk::Frame(M("TP_LOCALLAB_LOGFRA")))),
 logPFrame(Gtk::manage(new Gtk::Frame(M("TP_LOCALLAB_LOGPFRA")))),
+gradlogFrame(Gtk::manage(new Gtk::Frame(M("TP_LOCALLAB_GRADLOGFRA")))),
 //    retiBox(Gtk::manage(new Gtk::Frame(M("TP_LOCALLAB_CLARIFRA")))),
 retiBox(Gtk::manage(new ToolParamBlock())),
 maskretiBox(Gtk::manage(new ToolParamBlock())),
@@ -3792,6 +3795,8 @@ pe(nullptr)
     blackEv->delay = options.adjusterMaxDelay;
     whiteEv->delay = options.adjusterMaxDelay;
     targetGray->delay = options.adjusterMaxDelay;
+    strlog->delay = options.adjusterMaxDelay;
+    anglog->delay = options.adjusterMaxDelay;
 
     sourceGray->setAdjusterListener(this);
     blackEv->setAdjusterListener(this);
@@ -3800,6 +3805,8 @@ pe(nullptr)
     detail->setAdjusterListener(this);
     sensilog->setAdjusterListener(this);
     baselog->setAdjusterListener(this);
+    strlog->setAdjusterListener(this);
+    anglog->setAdjusterListener(this);
 
     whiteEv->setLogScale(16, 0);
     blackEv->setLogScale(2, -8);
@@ -3822,12 +3829,20 @@ pe(nullptr)
     logFBox->pack_start(*sourceGray);
     logFrame->add(*logFBox);
 
+    gradlogFrame->set_label_align(0.025, 0.5);
+    ToolParamBlock* const gradlogBox = Gtk::manage(new ToolParamBlock());
+    gradlogBox->pack_start(*strlog);
+    gradlogBox->pack_start(*anglog);
+    gradlogFrame->add(*gradlogBox);
+
     logBox->pack_start(*logPFrame);
     logBox->pack_start(*logFrame);
     logBox->pack_start(*targetGray);
     logBox->pack_start(*detail);
     logBox->pack_start(*baselog);
     logBox->pack_start(*sensilog);
+    logBox->pack_start(*gradlogFrame);
+
 
 
     panel->pack_start(*explog, false, false);
@@ -5460,6 +5475,8 @@ void Locallab::write(rtengine::procparams::ProcParams* pp, ParamsEdited* pedited
                     pp->locallab.spots.at(pp->locallab.selspot).detail = detail->getValue();
                     pp->locallab.spots.at(pp->locallab.selspot).sensilog = sensilog->getIntValue();
                     pp->locallab.spots.at(pp->locallab.selspot).baselog = baselog->getValue();
+                    pp->locallab.spots.at(pp->locallab.selspot).strlog = strlog->getValue();
+                    pp->locallab.spots.at(pp->locallab.selspot).anglog = anglog->getValue();
 
                 }
 
@@ -5877,6 +5894,8 @@ void Locallab::write(rtengine::procparams::ProcParams* pp, ParamsEdited* pedited
                         pe->locallab.spots.at(pp->locallab.selspot).detail = pe->locallab.spots.at(pp->locallab.selspot).detail || detail->getEditedState();
                         pe->locallab.spots.at(pp->locallab.selspot).sensilog = pe->locallab.spots.at(pp->locallab.selspot).sensilog || sensilog->getEditedState();
                         pe->locallab.spots.at(pp->locallab.selspot).baselog = pe->locallab.spots.at(pp->locallab.selspot).baselog || baselog->getEditedState();
+                        pe->locallab.spots.at(pp->locallab.selspot).strlog = pe->locallab.spots.at(pp->locallab.selspot).strlog || strlog->getEditedState();
+                        pe->locallab.spots.at(pp->locallab.selspot).anglog = pe->locallab.spots.at(pp->locallab.selspot).anglog || anglog->getEditedState();
 
                     }
                 }
@@ -6295,6 +6314,8 @@ void Locallab::write(rtengine::procparams::ProcParams* pp, ParamsEdited* pedited
                         pedited->locallab.spots.at(pp->locallab.selspot).detail = pedited->locallab.spots.at(pp->locallab.selspot).detail || detail->getEditedState();
                         pedited->locallab.spots.at(pp->locallab.selspot).sensilog = pedited->locallab.spots.at(pp->locallab.selspot).sensilog || sensilog->getEditedState();
                         pedited->locallab.spots.at(pp->locallab.selspot).baselog = pedited->locallab.spots.at(pp->locallab.selspot).baselog || baselog->getEditedState();
+                        pedited->locallab.spots.at(pp->locallab.selspot).strlog = pedited->locallab.spots.at(pp->locallab.selspot).strlog || strlog->getEditedState();
+                        pedited->locallab.spots.at(pp->locallab.selspot).anglog = pedited->locallab.spots.at(pp->locallab.selspot).anglog || anglog->getEditedState();
 
                     }
                 }
@@ -9087,6 +9108,8 @@ void Locallab::setDefaults(const rtengine::procparams::ProcParams * defParams, c
     detail->setDefault((double)defSpot->detail);
     sensilog->setDefault((double)defSpot->sensilog);
     baselog->setDefault((double)defSpot->baselog);
+    strlog->setDefault(defSpot->strlog);
+    anglog->setDefault(defSpot->anglog);
 
     // Set default edited states for adjusters and threshold adjusters
     if (!pedited) {
@@ -9333,6 +9356,8 @@ void Locallab::setDefaults(const rtengine::procparams::ProcParams * defParams, c
         detail->setDefaultEditedState(Irrelevant);
         sensilog->setDefaultEditedState(Irrelevant);
         baselog->setDefaultEditedState(Irrelevant);
+        strlog->setDefaultEditedState(Irrelevant);
+        anglog->setDefaultEditedState(Irrelevant);
 
     } else {
         const LocallabParamsEdited::LocallabSpotEdited* defSpotState = new LocallabParamsEdited::LocallabSpotEdited(true);
@@ -9585,6 +9610,8 @@ void Locallab::setDefaults(const rtengine::procparams::ProcParams * defParams, c
         detail->setDefaultEditedState(defSpotState->detail ? Edited : UnEdited);
         sensilog->setDefaultEditedState(defSpotState->sensilog ? Edited : UnEdited);
         baselog->setDefaultEditedState(defSpotState->baselog ? Edited : UnEdited);
+        strlog->setDefaultEditedState(defSpotState->strlog ? Edited : UnEdited);
+        anglog->setDefaultEditedState(defSpotState->anglog ? Edited : UnEdited);
 
     }
 }
@@ -11046,6 +11073,18 @@ void Locallab::adjusterChanged(Adjuster * a, double newval)
             }
         }
 
+        if (a == strlog) {
+            if (listener) {
+                listener->panelChanged(Evlocallabstrlog, strlog->getTextValue());
+            }
+        }
+
+        if (a == anglog) {
+            if (listener) {
+                listener->panelChanged(Evlocallabanglog, anglog->getTextValue());
+            }
+        }
+
     }
 
 }
@@ -11319,6 +11358,8 @@ void Locallab::setBatchMode(bool batchMode)
     detail->showEditedCB();
     sensilog->showEditedCB();
     baselog->showEditedCB();
+    strlog->showEditedCB();
+    anglog->showEditedCB();
 
 
     // Set batch mode for comboBoxText
@@ -12485,6 +12526,8 @@ void Locallab::updateLocallabGUI(const rtengine::procparams::ProcParams* pp, con
         detail->setValue(pp->locallab.spots.at(index).detail);
         sensilog->setValue(pp->locallab.spots.at(index).sensilog);
         baselog->setValue(pp->locallab.spots.at(index).baselog);
+        strlog->setValue(pp->locallab.spots.at(index).strlog);
+        anglog->setValue(pp->locallab.spots.at(index).anglog);
 
         if (pedited) {
             if (index < (int)pedited->locallab.spots.size()) {
@@ -12962,6 +13005,8 @@ void Locallab::updateLocallabGUI(const rtengine::procparams::ProcParams* pp, con
                 detail->setEditedState(spotState->detail ? Edited : UnEdited);
                 sensilog->setEditedState(spotState->sensilog ? Edited : UnEdited);
                 baselog->setEditedState(spotState->baselog ? Edited : UnEdited);
+                strlog->setEditedState(spotState->strlog ? Edited : UnEdited);
+                anglog->setEditedState(spotState->anglog ? Edited : UnEdited);
 
             }
         }
diff --git a/rtgui/locallab.h b/rtgui/locallab.h
index f608ca39f..a701b2a5e 100644
--- a/rtgui/locallab.h
+++ b/rtgui/locallab.h
@@ -425,6 +425,8 @@ private:
     Adjuster* const detail;
     Adjuster* const sensilog;
     Adjuster* const baselog;
+    Adjuster* const strlog;
+    Adjuster* const anglog;
 
     // ButtonCheck widgets
     // Color & Light
@@ -628,6 +630,7 @@ private:
     Gtk::Frame* const grainFrame;
     Gtk::Frame* const logFrame;
     Gtk::Frame* const logPFrame;
+    Gtk::Frame* const gradlogFrame;
     ToolParamBlock* const retiBox;
     ToolParamBlock* const maskretiBox;
     ToolParamBlock* const mask7;
diff --git a/rtgui/paramsedited.cc b/rtgui/paramsedited.cc
index 9fd02bca9..bab6b35cc 100644
--- a/rtgui/paramsedited.cc
+++ b/rtgui/paramsedited.cc
@@ -1359,6 +1359,8 @@ void ParamsEdited::initFrom(const std::vector<rtengine::procparams::ProcParams>&
                 locallab.spots.at(j).detail = locallab.spots.at(j).detail && pSpot.detail == otherSpot.detail;
                 locallab.spots.at(j).sensilog = locallab.spots.at(j).sensilog && pSpot.sensilog == otherSpot.sensilog;
                 locallab.spots.at(j).baselog = locallab.spots.at(j).baselog && pSpot.baselog == otherSpot.baselog;
+                locallab.spots.at(j).strlog = locallab.spots.at(j).strlog && pSpot.strlog == otherSpot.strlog;
+                locallab.spots.at(j).anglog = locallab.spots.at(j).anglog && pSpot.anglog == otherSpot.anglog;
 
             }
         }
@@ -4387,6 +4389,14 @@ void ParamsEdited::combine(rtengine::procparams::ProcParams& toEdit, const rteng
             toEdit.locallab.spots.at(i).fullimage = mods.locallab.spots.at(i).fullimage;
         }
 
+        if (locallab.spots.at(i).strlog) {
+            toEdit.locallab.spots.at(i).strlog   = mods.locallab.spots.at(i).strlog;
+        }
+
+        if (locallab.spots.at(i).anglog) {
+            toEdit.locallab.spots.at(i).anglog   = mods.locallab.spots.at(i).anglog;
+        }
+
     }
 
 
@@ -5755,7 +5765,9 @@ LocallabParamsEdited::LocallabSpotEdited::LocallabSpotEdited(bool v) :
     whiteEv(v),
     detail(v),
     sensilog(v),
-    baselog(v)
+    baselog(v),
+    strlog(v),
+    anglog(v)
 
 {
 }
@@ -6167,6 +6179,8 @@ void LocallabParamsEdited::LocallabSpotEdited::set(bool v)
     detail = v;
     sensilog = v;
     baselog = v;
+    strlog = v;
+    anglog = v;
 
 }
 
diff --git a/rtgui/paramsedited.h b/rtgui/paramsedited.h
index 1c6d6f23c..91ab10a3a 100644
--- a/rtgui/paramsedited.h
+++ b/rtgui/paramsedited.h
@@ -786,6 +786,8 @@ public:
         bool detail;
         bool sensilog;
         bool baselog;
+        bool strlog;
+        bool anglog;
 
         LocallabSpotEdited(bool v);