Update README.md

README.md

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 # cavesmerge
-THIS IS A PRETTY ROUGH VERSION OF A 3D CAVES MERGING PROGRAM
-IT WAS WRITTEN AT FIRST AS A DEMONSTRATION
-IT IS ROUGH BECAUSE IS VERY LIMMTED
-AND DINN'T USE THREAD AS SHOULD BE
+THIS IS A PRETTY ROUGH VERSION OF A 3D IMAGES MERGING PROGRAM
+IT WAS WRITTEN AT FIRST AS A DEMONSTRATION OF WHAT I AM THINKING TO DO
 
-IT IS LIMITED TO FIND AT LEAST 2 POINTS IN IN SIMILAR PLANES OF BOTH IMAGES
+THE LOGIC IS COMPARE THE MOST EXTERNAL COOSDINATED PLANES OF BOTH IMAGES AND FIND AT LEAST 2 POINTS SIMILAR IN BOTH IMAGES TO JOIN THEM TOGETHER.
 
-THE WAY TO USE IT IS TO RUN MERGE PROGRAM WITH THE OTHER THREE PROGRAMS IN THE SAME FOLDER
-THE WAY TO RUN IT IS WRITING THE TWO FILES AND A NEW NAME TO MERGE AFTER MERGE PROGRAM
+THERE ARE TWO PARTS OF A BUNNY. YOU NEED A PLY VIEWER PROGRAM TO SEE THERE IS A SPLITTED BUNNY.
+
+THE WAY TO RUN THE PROGRAM IS:
+
+$ ./merge.sh bunnyhead.ply bunnytail.ply output_name_file.ply
+
+YOU NEED A PLY VIEWER TO SEE THE RESULTS.