From 5dcd880b7ce278c1fc53982a57fce16400c7b3a6 Mon Sep 17 00:00:00 2001
From: Dave Schmenk <dschmenk@gmail.com>
Date: Wed, 13 May 2020 19:28:08 -0700
Subject: [PATCH] replace y with l in luv2rgb to make more sense

---
 ntsc-140.py | 12 ++++++------
 ntsc-160.py | 10 +++++-----
 ntsc-640.py | 12 ++++++------
 3 files changed, 17 insertions(+), 17 deletions(-)

diff --git a/ntsc-140.py b/ntsc-140.py
index e3a72c2..ccd7795 100644
--- a/ntsc-140.py
+++ b/ntsc-140.py
@@ -23,12 +23,12 @@ def yuv2rgb(y, u, v):
     b = max(0.0, y + 2.033 * u)
     return (r, g, b)
 
-def luv2rgb(y, u, v):
-    r = max(0.0, y + v)
-    g = max(0.0, y - 0.707 * u - 0.707 * v)
-    b = max(0.0, y + u)
+def luv2rgb(l, u, v):
+    r = max(0.0, l + v)
+    g = max(0.0, l - 0.707 * u - 0.707 * v)
+    b = max(0.0, l + u)
     return (r, g, b)
-    
+
 def ntscInitRGB(angle):
     YScale = [0.0, 0.25, 0.50, 1.0]#[0.0, 0.3334, 0.6667, 1.0]
     redSum = 0.0
@@ -96,7 +96,7 @@ def ntscInitPixels():
 
 def ntscMapRGB(rgb, x):
     global shrPixels
-    
+
     nearest = 195075
     nBest  = 0
     errRed = 0
diff --git a/ntsc-160.py b/ntsc-160.py
index 41a8045..072844d 100644
--- a/ntsc-160.py
+++ b/ntsc-160.py
@@ -22,10 +22,10 @@ def yuv2rgb(y, u, v):
     b = max(0.0, y + 2.033 * u)
     return (r, g, b)
 
-def luv2rgb(y, u, v):
-    r = max(0.0, y + v)
-    g = max(0.0, y - 0.707 * u - 0.707 * v)
-    b = max(0.0, y + u)
+def luv2rgb(l, u, v):
+    r = max(0.0, l + v)
+    g = max(0.0, l - 0.707 * u - 0.707 * v)
+    b = max(0.0, l + u)
     return (r, g, b)
 
 def ntscInitRGB(angle):
@@ -96,7 +96,7 @@ def ntscInitPixels():
 def ntscMapRGB(rgb, x):
     global shrPixels
     global ntscPrev
-    
+
     pix8 = x % 8
     if pix8 == 0:
         shrPixels = [0 for n in xrange(32)]
diff --git a/ntsc-640.py b/ntsc-640.py
index 951e1bb..98fe747 100644
--- a/ntsc-640.py
+++ b/ntsc-640.py
@@ -21,10 +21,10 @@ def yuv2rgb(y, u, v):
     b = max(0.0, y + 2.033 * u)
     return r, g, b
 
-def luv2rgb(y, u, v):
-    r = max(0.0, y + v)
-    g = max(0.0, y - 0.707 * u - 0.707 * v)
-    b = max(0.0, y + u)
+def luv2rgb(l, u, v):
+    r = max(0.0, l + v)
+    g = max(0.0, l - 0.707 * u - 0.707 * v)
+    b = max(0.0, l + u)
     return r, g, b
 
 def ntscInitRGB(angle):
@@ -82,7 +82,7 @@ def ntscPrev():
         grn += ntscOutput[p][1]
         blu += ntscOutput[p][2]
     return (min(255,red), min(255,grn), min(255,blu))
-     
+
 def ntscBest(ntsc, rgb):
     nearest = 195075
     lumBest = 0
@@ -110,7 +110,7 @@ def ntscMapRGB(rgb):
         blu = max(0, rgb[p][2] - prev[2])
         shr.append(ntscBest(ntscRGB[p], (red, grn, blu)))
     return shr
-    
+
 def displayBars():
     for l in xrange(4):
         for bar in xrange(len(ntscRGB)):