Update _index.md

Author: rly

content/working-groups/_index.md

@@ -20,7 +20,7 @@ sections:
       characterize the experimental animals. <br><br>
       <a href='https://docs.google.com/document/d/12EVToclVEKXF8OP5hd6eaTYT6vj-ewhHYVM54u7h-tU/edit#heading=h.xk81rob2tb1l'>
       [NDX Proposal]</a>
-    image: /images/genotype.png
+    image: /images/aibs_genotype_example.png
   - title: Spatial coordinates representation
     content: Reporting of spatial coordinates within the brain is a complex problem,
       requiring registration between data collected with multiple recording
@@ -35,7 +35,7 @@ sections:
       coordinate system. <br><br>
       <a href='https://docs.google.com/document/u/0/d/13frfqavbj4e0T-cmR3B8zGanrEe-f74Sa_s1yp_0LcI/edit'>
       [NDX Proposal]</a>
-    image: /images/spatial.png
+    image: /images/spatial_coordinates_wg_example.png
   - title: Behavioral task representation
     content: Behavioral tasks are an increasingly important component in
       neurophysiology experiments, and can have considerably more complex
@@ -51,15 +51,14 @@ sections:
       emulation of tasks from these machine-readable descriptions. <br><br>
       <a href='https://docs.google.com/document/d/1QQLbon-29Td5SblvB2AdWlGzCzgG7MNHloUD8C3tNdc/edit#heading=h.xk81rob2tb1l'>
       [NDX Proposal]</a>
-    image: /images/behavioral.png
+    image: /images/behavior_task_wg_example.png
   - title: External Working Groups
     bg_white: true
     content: NWB team members also participate in numerous external working groups.
       While the charge of external working groups are often broader than just
       NWB,  they all involve components that are relevant to NWB and commonly
       use NWB or are creating a Neurodata Extension (NDX) as part of their
       charge.
-    image: /images/external-group.png
   - title: INCF Working Group on standardization of a directory structure containing
       neurophysiology data
     bg_white: true
@@ -74,7 +73,6 @@ sections:
       discuss what experimental metadata is essential, and which formats and
       structures are appropriate for different metadata types. <br><br>
       <a href='https://github.com/INCF/neuroscience-data-structure/'>Working Group Page</a>
-    image: /images/incf-group.png
   - title: INCF Electrophysiology Stimulation Ontology Working Group
     bg_white: true
     content: Stimulus protocols are an essential component of neurophysiological
@@ -94,7 +92,6 @@ sections:
       beyond 1-D waveforms. <br><br>
       <a href='https://www.incf.org/sig/electrophysiology-stimulation-ontology-working-group'>
       Working Group Page</a>
-    image: /images/incf-ontology-group.png
   - title: Standardization of data/file formats for simulation outputs in
       computational neuroscience
     bg_white: true
@@ -110,7 +107,6 @@ sections:
       formats, and identifying avenues for improving interoperability. <br><br>
       <a href='https://github.com/catalystneuro/ndx-simulation-output'>Source</a>,
       <a href='https://github.com/nwb-extensions/ndx-simulation-output-record'>NDX</a>
-    image: /images/simulation.png
 past_groups:
   enable: true
   sections:
@@ -125,7 +121,7 @@ past_groups:
         users. Using intracellular electrophysiology as a first use case, the
         working group implemented a hierarchical table structure that
         facilitates grouping of data and metadata by experimental condition."
-      image: /images/hierarchical-diagram.png
+      image: /images/icephys_extension_illustration.png
   outcomes:
     title: Outcomes
     content: The working group drafted an extension for the NWB schema that