Improve schedule

workshops/2019-Turku-Basics.md

@@ -2,13 +2,28 @@
 
 ## Modules
 
-image_pixels.md
-pixel_calibration.md
-image_display.md 
-pixel_data_types.md
-pixel_processing.md
-binarization.md
-connected_components.md
-measure_shapes.md
-measure_intensities.md
-filter_neighbourhood.md
+
+### Essentials 
+
+1. image_pixels.md
+2. pixel_calibration.md
+3. image_display.md 
+4. pixel_data_types.md
+5. pixel_processing.md
+6. binarization.md
+7. connected_components.md
+8. measure_shapes.md
+9. measure_intensities.md // TODO: Concept map
+10. filter_neighbourhood.md
+11. basic_image_analysis_workflow.md // draw it 
+
+## Local background subtraction
+ 
+12. filter_rank.md ( use median filter with two noisy squares example )
+13. local_background_subtraction.md ( use median-based with auto-phagosome example )
+14. filter_morphological.md ( also show how to compute an edge of an object )
+
+## Distance transform
+
+15. distance_transform.md
+