Index: trunk/ppStack/src/ppStackReadout.c
===================================================================
--- trunk/ppStack/src/ppStackReadout.c	(revision 19337)
+++ trunk/ppStack/src/ppStackReadout.c	(revision 19346)
@@ -46,4 +46,29 @@
 
     return status;
+}
+
+
+bool ppStackInspect(psThreadJob *job)
+{
+    PS_ASSERT_THREAD_JOB_NON_NULL(job, false);
+
+    psArray *args = job->args;  // Input arguments
+    psArray *inspect = args->data[0]; // Array of pixel arrays
+    int index = PS_SCALAR_VALUE(args->data[1], S32); // Index of interest
+
+    psArray *inputs = inspect->data[index]; // Array of interest
+    psPixels *output = NULL;    // Output pixel list
+    for (int i = 0; i < inputs->n; i++) {
+        psPixels *input = inputs->data[i]; // Input pixel list
+        if (!input || input->n == 0) {
+            continue;
+        }
+        output = psPixelsConcatenate(output, input);
+    }
+
+    psFree(inputs);
+    inspect->data[index] = output;
+
+    return true;
 }