--- image.h	2003/01/25 22:44:50	1.8.2.9
+++ image.h	2003/01/25 22:51:20	1.8.2.10
@@ -55,6 +55,9 @@
 				 uint16_t width,
 				 uint16_t height);
 
+
+float sse_to_PSNR(long sse, int pixels);
+
 long plane_sse(uint8_t * orig,
 		   uint8_t * recon,
 		   uint16_t stride,