Changeset 38267 for trunk/ppImage/src

Timestamp:

May 13, 2015, 11:11:15 AM (11 years ago)

Author:

eugene

Message:

ensure there are no NANs in the image

File:

• trunk/ppImage/src/ppImageSquashNANs.c (modified) (2 diffs)

trunk/ppImage/src/ppImageSquashNANs.c

@@ -4 +4 @@
 
 #include "ppImage.h"
+
+# define LO_16BIT -32768
+# define HI_16BIT  32768
+# define MX_16BIT  65536
+
+bool ppImageSquashNANsImage (psImage *image, float minValue, float maxValue, float offset);
 
 bool ppImageSquashNANs(pmConfig *config, ppImageOptions *options, pmFPAview *view)
@@ -18 +24 @@
 
     psImage *image = readout->image;    // Readout's image
+
+    // We are going to force the range to be (-999 to 2^16 - 1002, ie, 1 less on each end than 2^16. this allows for float round errors
+    int bzero = LO_16BIT - 0;
+    float minValue = HI_16BIT + bzero + 1; 
+    float maxValue = MX_16BIT + minValue - 3;
+
+    if (image->parent) {
+        psImage *parent = (psImage *) image->parent;
+        ppImageSquashNANsImage (parent, minValue, maxValue, 500.0);
+    } else {
+        ppImageSquashNANsImage (image, minValue, maxValue, 500.0);
+
+        // squash NANs in overscan regions
+        psList *overscans = readout->bias; // List of the overscan images
+        psListIterator *iter = psListIteratorAlloc(overscans, PS_LIST_HEAD, false); // Iterator
+        psImage *overscan = NULL; // Overscan image from iterator
+        while ((overscan = psListGetAndIncrement(iter))) {
+            ppImageSquashNANsImage (overscan, minValue, maxValue, 500.0);
+        }
+        psFree(iter);
+    } 
+
+    psLogMsg ("ppImage", 5, "squash NANs: %f sec\n", psTimerMark ("squash.NANs"));
+    return true;
+}
+
+bool ppImageSquashNANsImage (psImage *image, float minValue, float maxValue, float offset) {
+  
     int numCols = image->numCols, numRows = image->numRows; // Size of image
-
+  
     for (int y = 0; y < numRows; y++) {
         for (int x = 0; x < numCols; x++) {
             if (!isfinite(image->data.F32[y][x])) {
-                image->data.F32[y][x] = -500.0;
+                image->data.F32[y][x] = 1.0;
+            } else {
+                image->data.F32[y][x] = PS_MAX (minValue, PS_MIN (maxValue, image->data.F32[y][x] + 500.0));
             }
         }
     }
-    psLogMsg ("ppImage", 5, "squash NANs: %f sec\n", psTimerMark ("squash.NANs"));
-
     return true;
 }
+