long needed update to the README

README.md

@@ -6,20 +6,40 @@ This repository is for a interesting project involving Google's Vision API and s
 
 ## How does it work?
 
-This application is built in Python and utilizes the `google-cloud` python module. Install using `pip install google-cloud`. A key should be provided by google in a `.json` file, insert this at `./package/key/photo_tagging_service.json`.
+This application is built in Python and utilizes the `google-cloud` python module family.
+
+All requirements will be automatically be installed whenever `pip install .` is ran inside the `phototag` directory.
+
+The basic process for each photo be tagged is as follows    
+1. Build relevant paths and identify important information used throughout the process
+2. Save RAW files as JPEG using `rawpy`
+3. Optimize JPEG files using thumbnailing and quality measures
+4. Open and send the file to Google using the Vision API with `google_cloud.vision`
+5. Compile and save the image's labels from Google
+    a. JPEGs use the `iptcinfo3` module to save
+    b. RAW files use a messy implemetation of the `xml` module to read and write tags (experimental) from and to the XMP Sidecar file used by Adobe
+6. Delete the temporary (optimized) file and move the original image to the output folder.
+
+The command used to access this program is `phototag run`, which would process and label all eligible images in the working directory.
 
 ## Features
 
-Automatic tagging of photos using a high quality Vision API
+* Automatic tagging of photos using Google's Vision API
+    * Fast and accurate, it returns specific keywords using Google's very own Labelling model
+    * Can easily be used yourself if you sign up
+        * Super cheap and easy to setup
 
-Automatic compression of photos for minimal data usage on both your and Google's end
+* Automatic compression of photos for minimal data usage on both your and Google's end
+    * Uses combination thumbnailing and general JPEG compression to reduce size to a mere some dozen kilobytes.
 
-Support for .NEF RAW file compression with .XMP metadata files.
+* Support for both JPEG and RAW
+    * Store tags in JPEG via IPTC metadata
+    * Store tags in RAW files through Adobe's XMP sidecar files
+        * Full support for NEF only, it is assumed but not tested whether or not CR2 and other formats will behave the same.
+        * Requires a existing XMP file to be available
 
-- With added support for all non .NEF files with basic 
+## Creation
 
-## Learning
-
-I've typed up a good file with everything I've learned about XMP files, Adobe, and just how complex this problem really was for me.
+I've typed up a file with everything I've learned about XMP files, Adobe, and just how complex this problem really was for me.
 
 [./LEARNING.md](./LEARNING.md)