Updated split merge instructions (markdown)

split-merge-instructions.md

@@ -2,7 +2,7 @@
 
 In this tutorial I will run the tanzania/ninehimages dataset. 
 
-## Calibrate images
+## Calibrate images (linux only)
 
  Image calibration is essential for large datasets because error propogation due to image distortion will cause a bowl effect on the models. First download [this repo](https://github.com/dakotabenjamin/cameracalibration). In it are two python scripts that you will run on your images to determine your camera distortion parameters and then remove that distortion. Follow the instructions in that repository to get your undistorted images