Remove Tensorflow support

Makefile.am

@@ -110,7 +110,6 @@ lib_LTLIBRARIES = libtesseract.la
 libtesseract_la_LDFLAGS = $(LEPTONICA_LIBS)
 libtesseract_la_LDFLAGS += $(libarchive_LIBS)
 libtesseract_la_LDFLAGS += $(libcurl_LIBS)
-libtesseract_la_LDFLAGS += $(TENSORFLOW_LIBS)
 if T_WIN
 libtesseract_la_LDFLAGS += -no-undefined -lws2_32
 else
@@ -509,10 +508,6 @@ libtesseract_lstm_la_CPPFLAGS += -I$(top_srcdir)/src/cutil
 libtesseract_lstm_la_CPPFLAGS += -I$(top_srcdir)/src/dict
 libtesseract_lstm_la_CPPFLAGS += -I$(top_srcdir)/src/lstm
 libtesseract_lstm_la_CPPFLAGS += -I$(top_srcdir)/src/viewer
-if TENSORFLOW
-libtesseract_lstm_la_CPPFLAGS += -DINCLUDE_TENSORFLOW
-libtesseract_lstm_la_CPPFLAGS += -I/usr/include/tensorflow
-endif
 if !NO_TESSDATA_PREFIX
 libtesseract_lstm_la_CPPFLAGS += -DTESSDATA_PREFIX='"@datadir@"'
 endif
@@ -535,7 +530,6 @@ noinst_HEADERS += src/lstm/reversed.h
 noinst_HEADERS += src/lstm/series.h
 noinst_HEADERS += src/lstm/static_shape.h
 noinst_HEADERS += src/lstm/stridemap.h
-noinst_HEADERS += src/lstm/tfnetwork.h
 noinst_HEADERS += src/lstm/weightmatrix.h
 
 noinst_LTLIBRARIES += libtesseract_lstm.la
@@ -556,10 +550,6 @@ libtesseract_lstm_la_SOURCES += src/lstm/reconfig.cpp
 libtesseract_lstm_la_SOURCES += src/lstm/reversed.cpp
 libtesseract_lstm_la_SOURCES += src/lstm/series.cpp
 libtesseract_lstm_la_SOURCES += src/lstm/stridemap.cpp
-if TENSORFLOW
-libtesseract_lstm_la_SOURCES += src/lstm/tfnetwork.cpp
-libtesseract_lstm_la_SOURCES += src/lstm/tfnetwork.pb.cc
-endif
 libtesseract_lstm_la_SOURCES += src/lstm/weightmatrix.cpp
 
 # Rules for src/textord.
@@ -730,7 +720,6 @@ tesseract_LDFLAGS = $(OPENMP_CXXFLAGS)
 
 tesseract_LDADD = libtesseract.la
 tesseract_LDADD += $(LEPTONICA_LIBS)
-tesseract_LDADD += $(TENSORFLOW_LIBS)
 tesseract_LDADD += $(libarchive_LIBS)
 tesseract_LDADD += $(libcurl_LIBS)
 
@@ -900,7 +889,6 @@ EXTRA_PROGRAMS += $(trainingtools)
 extralib = libtesseract.la
 extralib += $(libarchive_LIBS)
 extralib += $(LEPTONICA_LIBS)
-extralib += $(TENSORFLOW_LIBS)
 if T_WIN
 extralib += -lws2_32
 endif
@@ -1008,7 +996,6 @@ fuzzer-api: unittest/fuzzers/fuzzer-api.cpp
           $< \
           $(builddir)/.libs/libtesseract.a \
           $(LEPTONICA_LIBS) \
-          $(TENSORFLOW_LIBS) \
           $(libarchive_LIBS) \
           $(libcurl_LIBS) \
           -o $@
@@ -1028,7 +1015,6 @@ fuzzer-api-512x256: unittest/fuzzers/fuzzer-api.cpp
           $< \
           $(builddir)/.libs/libtesseract.a \
           $(LEPTONICA_LIBS) \
-          $(TENSORFLOW_LIBS) \
           $(libarchive_LIBS) \
           $(libcurl_LIBS) \
           -o $@
@@ -1141,10 +1127,6 @@ endif # ENABLE_TRAINING
 unittest_CPPFLAGS += -I$(top_srcdir)/src/viewer
 unittest_CPPFLAGS += -I$(top_srcdir)/src/wordrec
 unittest_CPPFLAGS += -I$(top_srcdir)/unittest
-if TENSORFLOW
-unittest_CPPFLAGS += -DINCLUDE_TENSORFLOW
-unittest_CPPFLAGS += -I/usr/include/tensorflow
-endif # TENSORFLOW
 
 # Build googletest:
 check_LTLIBRARIES = libgtest.la libgtest_main.la libgmock.la libgmock_main.la
@@ -1172,7 +1154,6 @@ GTEST_LIBS =  libgtest.la libgtest_main.la -lpthread
 GMOCK_LIBS =  libgmock.la libgmock_main.la
 TESS_LIBS = $(GTEST_LIBS)
 TESS_LIBS += libtesseract.la $(libarchive_LIBS)
-TESS_LIBS += $(TENSORFLOW_LIBS)
 TRAINING_LIBS = libtesseract_training.la
 TRAINING_LIBS += $(TESS_LIBS)
 unittest_CPPFLAGS += -isystem $(top_srcdir)/unittest/third_party/googletest/googletest/include
@@ -1419,10 +1400,6 @@ networkio_test_CPPFLAGS = $(unittest_CPPFLAGS)
 networkio_test_LDADD = $(TESS_LIBS)
 
 normstrngs_test_SOURCES = unittest/normstrngs_test.cc
-if TENSORFLOW
-normstrngs_test_SOURCES += unittest/third_party/utf/rune.c
-normstrngs_test_SOURCES += unittest/util/utf8/unilib.cc
-endif # TENSORFLOW
 normstrngs_test_CPPFLAGS = $(unittest_CPPFLAGS)
 normstrngs_test_LDADD = $(TRAINING_LIBS) $(ICU_I18N_LIBS) $(ICU_UC_LIBS)
 
@@ -1441,11 +1418,6 @@ pagesegmode_test_CPPFLAGS = $(unittest_CPPFLAGS)
 pagesegmode_test_LDADD = $(TRAINING_LIBS) $(LEPTONICA_LIBS)
 
 pango_font_info_test_SOURCES = unittest/pango_font_info_test.cc
-if TENSORFLOW
-pango_font_info_test_SOURCES += unittest/third_party/utf/rune.c
-pango_font_info_test_SOURCES += unittest/util/utf8/unicodetext.cc
-pango_font_info_test_SOURCES += unittest/util/utf8/unilib.cc
-endif # TENSORFLOW
 pango_font_info_test_CPPFLAGS = $(unittest_CPPFLAGS)
 pango_font_info_test_LDADD = $(TRAINING_LIBS) $(LEPTONICA_LIBS)
 pango_font_info_test_LDADD += $(ICU_I18N_LIBS)

configure.ac

@@ -270,25 +270,6 @@ AC_ARG_WITH([curl],
             AS_HELP_STRING([--with-curl],
                            [Build with libcurl which supports processing an image URL @<:@default=check@:>@]),
             [], [with_curl=check])
-AC_ARG_WITH([tensorflow],
-  AS_HELP_STRING([--with-tensorflow],
-                 [support TensorFlow @<:@default=check@:>@]),
-  [], [with_tensorflow=check])
-
-# Check whether to build with support for TensorFlow.
-AM_CONDITIONAL([TENSORFLOW], false)
-TENSORFLOW_LIBS=
-AS_IF([test "x$with_tensorflow" != xno],
-  [AC_CHECK_HEADERS([tensorflow/core/framework/graph.pb.h],
-    [AC_SUBST([TENSORFLOW_LIBS], ["-lprotobuf -ltensorflow_cc"])
-      AM_CONDITIONAL([TENSORFLOW], true)
-    ],
-    [if test "x$with_tensorflow" != xcheck; then
-      AC_MSG_FAILURE(
-        [--with-tensorflow was given, but test for libtensorflow-dev failed])
-     fi
-    ])
-  ])
 
 # https://lists.apple.com/archives/unix-porting/2009/Jan/msg00026.html
 m4_define([MY_CHECK_FRAMEWORK],

src/lstm/network.cpp

@@ -38,9 +38,6 @@
 #include "scrollview.h"
 #include "series.h"
 #include "statistc.h"
-#ifdef INCLUDE_TENSORFLOW
-#  include "tfnetwork.h"
-#endif
 #include "tprintf.h"
 
 namespace tesseract {
@@ -287,11 +284,7 @@ Network *Network::CreateFromFile(TFile *fp) {
       network = new Series(name);
       break;
     case NT_TENSORFLOW:
-#ifdef INCLUDE_TENSORFLOW
-      network = new TFNetwork(name);
-#else
-      tprintf("TensorFlow not compiled in! -DINCLUDE_TENSORFLOW\n");
-#endif
+      tprintf("Unsupported TensorFlow model\n");
       break;
     // All variants of FullyConnected.
     case NT_SOFTMAX: