diff --git a/slsDetectorCalibration/tiffIO.cpp b/slsDetectorCalibration/tiffIO.cpp
new file mode 100644
index 000000000..b0dd03b71
--- /dev/null
+++ b/slsDetectorCalibration/tiffIO.cpp
@@ -0,0 +1,76 @@
+
+#include "tiffIO.h"
+#include<iostream>
+using namespace std;
+// #undef cbf_failnez 
+// #define cbf_failnez(x)				\
+//   {						\
+//   int err;	        			\
+//   err = (x);					\
+//   if (err) {						\
+//   fprintf(stderr,"\nCBFlib fatal error %x \n",err);	\
+//   exit(-1);						\
+//   }							\
+//   }
+
+void *WriteToTiff(float * imgData, const char * imgname, int nrow, int ncol){
+  int sampleperpixel=1;
+  // unsigned char * buff=NULL;
+  tsize_t linebytes;
+ cout << "--" <<endl;
+  TIFF * tif = TIFFOpen(imgname,"w");
+  if (tif) {
+    TIFFSetField(tif,TIFFTAG_IMAGEWIDTH,ncol);
+    TIFFSetField(tif, TIFFTAG_IMAGELENGTH, nrow);
+    TIFFSetField(tif, TIFFTAG_SAMPLESPERPIXEL,sampleperpixel);
+    TIFFSetField(tif, TIFFTAG_BITSPERSAMPLE, 32);
+    TIFFSetField(tif, TIFFTAG_ORIENTATION, ORIENTATION_BOTLEFT); 
+    TIFFSetField(tif, TIFFTAG_PLANARCONFIG, PLANARCONFIG_CONTIG);
+    TIFFSetField(tif, TIFFTAG_PHOTOMETRIC, PHOTOMETRIC_MINISBLACK);
+    TIFFSetField(tif, TIFFTAG_SAMPLEFORMAT, SAMPLEFORMAT_IEEEFP);
+    
+    linebytes = sampleperpixel*ncol;
+    TIFFSetField(tif, TIFFTAG_ROWSPERSTRIP, TIFFDefaultStripSize(tif, ncol*sampleperpixel));
+    for(int irow=0; irow<nrow; irow++){
+      TIFFWriteScanline(tif,&imgData[irow*ncol],irow,0);
+    }
+    
+    TIFFClose(tif);
+  } else
+    cout << "could not open file " << imgname << " for writing " << endl;
+
+  return NULL;
+};
+
+float *ReadFromTiff( const char * imgname, uint32 &nrow, uint32 &ncol){
+  // unsigned char * buff=NULL;
+
+  TIFF * tif = TIFFOpen(imgname,"r");
+  if (tif){
+        uint32 bps;
+	uint32 sampleperpixel=1;
+  tsize_t linebytes;
+
+ uint32 imagelength;
+
+    TIFFGetField(tif,TIFFTAG_IMAGEWIDTH,&ncol);
+    TIFFGetField(tif, TIFFTAG_IMAGELENGTH, &nrow);
+    TIFFSetField(tif, TIFFTAG_SAMPLESPERPIXEL,sampleperpixel);
+    TIFFSetField(tif, TIFFTAG_BITSPERSAMPLE, &bps);
+    TIFFGetField(tif, TIFFTAG_IMAGELENGTH, &imagelength);
+
+    float * imgData=new float[ncol*nrow];
+    linebytes = sampleperpixel*ncol;
+    //  TIFFSetField(tif, TIFFTAG_ROWSPERSTRIP, TIFFDefaultStripSize(tif, ncol*sampleperpixel));
+    for(int irow=0; irow<nrow; irow++){
+      //tiffreadscanline(tif, buf, row);
+      TIFFReadScanline(tif,&imgData[irow*ncol],irow);
+    }
+
+    TIFFClose(tif);
+    return imgData;
+  }  else
+    cout << "could not open file " << imgname << " for reading " << endl;
+  return NULL;
+};
+