chore: clean up dpi and update READMEs

runtime/experiments/applications/by_dpi/README.md

@@ -0,0 +1,7 @@
+# OCR varied by DPI
+
+Generates pnm image files containing random words from the wamerican dictionary.
+
+The number of words are held constant at 100, and the `mono` font is used for all runs. The dpi of the image is varied to judge how more visual details affects OCR accuracy and performance.
+
+Run `install.sh` to install required tools and `run.sh` to run the tests.

runtime/experiments/applications/by_font/README.md

@@ -1,7 +1,7 @@
-# OCR varied by word
+# OCR varied by font
 
 Generates pnm image files containing random words from the wamerican dictionary.
 
-The number of words are varied between 1, 10, 100 in order to assess how the size of text OCRed affects the execution profile of the sandbox serving the request.
+The number of words is held constant at 100, but a different font is used to render the text. Generally, `mono` performs the best, followed by `URW Gothic`, followed by `Lobster Two`, which is a stylistic font that performs quite poorly. 
 
 Run `install.sh` to install required tools and `run.sh` to run the tests.

runtime/experiments/applications/by_size/README.md

@@ -1,7 +0,0 @@
-# OCR varied by word
-
-Generates pnm image files containing random words from the wamerican dictionary.
-
-The number of words are varied between 1, 10, 100 in order to assess how the size of text OCRed affects the execution profile of the sandbox serving the request.
-
-Run `install.sh` to install required tools and `run.sh` to run the tests.