Merge branch 'master' of ssh://animus.robocracy.org/srv/git/knowledge

3 files changed, 30 insertions, 0 deletions

diff --git a/software/freebsd-tricks b/software/freebsd-tricks
index 84010f6..0344abd 100644
--- a/software/freebsd-tricks
+++ b/software/freebsd-tricks
@@ -7,3 +7,8 @@ Burn an ISO image
 To burn a CD-R, use ``burncd`` like so::
 
 $ burncd -f /dev/acd0 data FILENAME.iso fixate
+
+Network Tools
+----------------------
+
+``iftop`` is great.
diff --git a/software/gimp b/software/gimp
new file mode 100644
index 0000000..97d7393
--- /dev/null
+++ b/software/gimp
@@ -0,0 +1,19 @@
+======================
+The Gimp
+======================
+
+How to Sharpen Photos
+----------------------------
+First decompose the image into HSV: Colors/Compose.../Decompose. Select
+"HSV" from the list and "Decompose to Layers". This will make a new image
+(close the original).
+
+Select the "Value" layer for editing (so that colors aren't affected). The
+"Unsharped Mask" filter is under Filters/Enhance.
+
+Radius is how many pixels to select, amount is the strength of the filter,
+and threshold allows parts of the image to be ignored.
+
+After applying the filter go back to Colors/Compose.../Compose and select
+HSV again to regenerate the color image.
+
diff --git a/software/scheme b/software/scheme
index c64d000..dda68f1 100644
--- a/software/scheme
+++ b/software/scheme
@@ -77,3 +77,9 @@ image can be specified with the ``--band`` option at runtime or with
 ``(disk-restore filename)`` from within the interpreter. Bands are also called
 worlds.
 
+"First Class"
+------------------
+"Procedures as first class objects" is one of the features commonly attributed
+to scheme. What does that mean? SICP describes first class objects as those
+that can be: named by variables, passed as arguments, returned as results,
+and included in data structures.