function [FieldSize] = GetPlaceFieldSize(SkaggsrateMat)
%% Open field
    Contour.FieldSize_Thre=max(max(SkaggsrateMat)) * 0.2;
    Contour.FieldMap=SkaggsrateMat > Contour.FieldSize_Thre;

    Contour.ContinuousMap=bwconncomp(Contour.FieldMap);
    Contour.ContinuousLabled = labelmatrix(Contour.ContinuousMap);
    Contour.IndividualFieldSize=0;
    if ~isempty(Contour.ContinuousMap.PixelIdxList)
        for k=1:length(Contour.ContinuousMap.PixelIdxList)
            if length(Contour.ContinuousMap.PixelIdxList{1,k}) > 10 
                Contour.IndividualFieldSize(k)=length(Contour.ContinuousMap.PixelIdxList{1,k});
            end
        end
        FieldSize=sum(Contour.IndividualFieldSize);
    else
        FieldSize=0;
    end