add minimum size to process option

main.go

@@ -105,7 +105,7 @@ func doSingleImage(f string, c config, s stats) stats {
 		fmt.Printf("Error reading file %s: %s\n", f, err.Error())
 		return s
 	}
-	if st.Size() < int64(c.AtLeast) {
+	if st.Size() < int64(c.AtLeast)*1024 {
 			s.StartingBytes += uint64(st.Size())
 			if !c.Quiet {
 				fmt.Printf("Ignoring %s as %d bytes are below threashold", f, st.Size())