help : how to calculate the distance map, could u share any code for this？

[GLOGAN2020]

thanks for you great work for WSI image detection, I did not find the code for calculate the distance map(centerness MAP)，" lymphocyte center-ness map is obtained by calculating the normalized distance from the locations within each lymphocyte mask to the corresponding manually annotated dot"

[ZhangXX54]

center-ness map is obtained by：
Gi ＝ 255*[((Dmax-Di)-Dmin)/(Dmax-Dmin)]，
where Gi is the grayscale value of a location in the _i_th cell instance, Di is the distance from that location to the corresponding manually annotated dot, and Dmin and Dmax are the nearest/farthest distances from all locations in the _i_th cell to its manually annotated dot, respectively.