Inserting Image Data
// Allocate memory for the image data, and get it.
imageData = calloc(dataSize, sizeof(unsigned char));
UserDefinedSetImageDataFunction(imageData);
if(SE_PutImageData( my_image, 0, 0, 0, currExt_h,currExt_v,
currExt_z, currLevel, dataSize,
imageData) != SE_SUCCESS)
fprintf(stderr, "Error - Can't put image data!\n");