require 'dot' in website workflow test. Add helpful links

Signed-off-by: Peter Hillman <[email protected]>

.github/workflows/website_workflow.yml

@@ -50,7 +50,7 @@ jobs:
       - name: Install doxygen & imagemagick
         # Need imagemagick for convert, to convert "Test Image" exrs to jpgs
         # Need openexr for exrheader
-        run: sudo apt-get install -y doxygen imagemagick openexr 
+        run: sudo apt-get install -y doxygen imagemagick openexr dot
       - name: Install sphinx requirements
         run: pip3 install -r website/requirements.txt
       - name: Configure

website/SceneLinear.rst

@@ -75,7 +75,7 @@ more natural. The images above illustrate this. The first version of the image
 presents the pixels with the same color and intensity that the real objects had [#f1]_
 This particular scene has low enough contrast and subtle enough colors that monitors
 are capable of displaying it faithfully.
-The second image is a JPEG created by the camera using its built-in tone mapping of the image. This image
+The second image is a JPEG created by the camera using its built-in tone mapping giof the image. This image
 looks more pleasing, even though the colors are no longer faithful to those
 originally observed.
 
@@ -247,6 +247,28 @@ subsequent steps applied before being displayed.
    }
 
 
+Color management resources
+==========================
+
+`OpenColorIO <https://opencolorio.org/>`_ (OCIO) is a framework providing
+software libraries to apply color transformations based on a configuration.
+Since the same config is shared by all OCIO-compatible software, color
+conversions can be applied consistently when working with the same images in
+multiple software packages.
+
+The `Academy Color Encoding System (ACES) <https://acescentral.com/>`_ defines
+standard workflows to convert from raw camera images to scene-linear images, and
+a standard tone mapping system for convert to output referred images.
+OpenColorIO configs are available which implement the necessary conversions.
+ACES image files (specified by SMPTE ST2065-4) are scene-linear OpenEXR
+images
+
+`OpenImageIO <https://github.com/AcademySoftwareFoundation/OpenImageIO>`_
+provides a library and command line tools for loading and saving images in
+multiple formats, including OpenEXR, and supports image processing with
+OpenColorIO.
+
+
 .. rubric:: Footnotes
 .. [#f1] The colors in the first image will be rendered as observed on monitors which are calibrated for sRGB
          with a maximum intensity of 62 cd/m :superscript:`2`. Most monitors will display the colors accurately but slightly too bright.