add frozen graph example

example_basics_frozen_graph/Makefile

+# Attempt to load a config.make file.
+# If none is found, project defaults in config.project.make will be used.
+ifneq ($(wildcard config.make),)
+	include config.make
+endif
+
+# make sure the the OF_ROOT location is defined
+ifndef OF_ROOT
+	OF_ROOT=$(realpath ../../..)
+endif
+
+# call the project makefile!
+include $(OF_ROOT)/libs/openFrameworksCompiled/project/makefileCommon/compile.project.mk
+
+# ofxTensorFlow2
+include $(OF_ROOT)/addons/ofxTensorFlow2/addon_targets.mk

example_basics_frozen_graph/README.md

+# Basic example
+
+This is an example for openFrameworks which demonstrates how to load and evaluate a _Frozen Graph_ created using TensorFlow.
+
+### TensorFlow2
+
+
+### openFrameworks
\ No newline at end of file

example_basics_frozen_graph/addons.make

+ofxTensorFlow2

example_basics_frozen_graph/config.make

+################################################################################
+# CONFIGURE PROJECT MAKEFILE (optional)
+#   This file is where we make project specific configurations.
+################################################################################
+
+################################################################################
+# OF ROOT
+#   The location of your root openFrameworks installation
+#       (default) OF_ROOT = ../../.. 
+################################################################################
+# OF_ROOT = ../../..
+
+################################################################################
+# PROJECT ROOT
+#   The location of the project - a starting place for searching for files
+#       (default) PROJECT_ROOT = . (this directory)
+#    
+################################################################################
+# PROJECT_ROOT = .
+
+################################################################################
+# PROJECT SPECIFIC CHECKS
+#   This is a project defined section to create internal makefile flags to 
+#   conditionally enable or disable the addition of various features within 
+#   this makefile.  For instance, if you want to make changes based on whether
+#   GTK is installed, one might test that here and create a variable to check. 
+################################################################################
+# None
+
+################################################################################
+# PROJECT EXTERNAL SOURCE PATHS
+#   These are fully qualified paths that are not within the PROJECT_ROOT folder.
+#   Like source folders in the PROJECT_ROOT, these paths are subject to 
+#   exlclusion via the PROJECT_EXLCUSIONS list.
+#
+#     (default) PROJECT_EXTERNAL_SOURCE_PATHS = (blank) 
+#
+#   Note: Leave a leading space when adding list items with the += operator
+################################################################################
+# PROJECT_EXTERNAL_SOURCE_PATHS = 
+
+################################################################################
+# PROJECT EXCLUSIONS
+#   These makefiles assume that all folders in your current project directory 
+#   and any listed in the PROJECT_EXTERNAL_SOURCH_PATHS are are valid locations
+#   to look for source code. The any folders or files that match any of the 
+#   items in the PROJECT_EXCLUSIONS list below will be ignored.
+#
+#   Each item in the PROJECT_EXCLUSIONS list will be treated as a complete 
+#   string unless teh user adds a wildcard (%) operator to match subdirectories.
+#   GNU make only allows one wildcard for matching.  The second wildcard (%) is
+#   treated literally.
+#
+#      (default) PROJECT_EXCLUSIONS = (blank)
+#
+#		Will automatically exclude the following:
+#
+#			$(PROJECT_ROOT)/bin%
+#			$(PROJECT_ROOT)/obj%
+#			$(PROJECT_ROOT)/%.xcodeproj
+#
+#   Note: Leave a leading space when adding list items with the += operator
+################################################################################
+# PROJECT_EXCLUSIONS =
+
+################################################################################
+# PROJECT LINKER FLAGS
+#	These flags will be sent to the linker when compiling the executable.
+#
+#		(default) PROJECT_LDFLAGS = -Wl,-rpath=./libs
+#
+#   Note: Leave a leading space when adding list items with the += operator
+#
+# Currently, shared libraries that are needed are copied to the 
+# $(PROJECT_ROOT)/bin/libs directory.  The following LDFLAGS tell the linker to
+# add a runtime path to search for those shared libraries, since they aren't 
+# incorporated directly into the final executable application binary.
+################################################################################
+# PROJECT_LDFLAGS=-Wl,-rpath=./libs
+
+################################################################################
+# PROJECT DEFINES
+#   Create a space-delimited list of DEFINES. The list will be converted into 
+#   CFLAGS with the "-D" flag later in the makefile.
+#
+#		(default) PROJECT_DEFINES = (blank)
+#
+#   Note: Leave a leading space when adding list items with the += operator
+################################################################################
+# PROJECT_DEFINES = 
+
+################################################################################
+# PROJECT CFLAGS
+#   This is a list of fully qualified CFLAGS required when compiling for this 
+#   project.  These CFLAGS will be used IN ADDITION TO the PLATFORM_CFLAGS 
+#   defined in your platform specific core configuration files. These flags are
+#   presented to the compiler BEFORE the PROJECT_OPTIMIZATION_CFLAGS below. 
+#
+#		(default) PROJECT_CFLAGS = (blank)
+#
+#   Note: Before adding PROJECT_CFLAGS, note that the PLATFORM_CFLAGS defined in 
+#   your platform specific configuration file will be applied by default and 
+#   further flags here may not be needed.
+#
+#   Note: Leave a leading space when adding list items with the += operator
+################################################################################
+# PROJECT_CFLAGS = 
+
+################################################################################
+# PROJECT OPTIMIZATION CFLAGS
+#   These are lists of CFLAGS that are target-specific.  While any flags could 
+#   be conditionally added, they are usually limited to optimization flags. 
+#   These flags are added BEFORE the PROJECT_CFLAGS.
+#
+#   PROJECT_OPTIMIZATION_CFLAGS_RELEASE flags are only applied to RELEASE targets.
+#
+#		(default) PROJECT_OPTIMIZATION_CFLAGS_RELEASE = (blank)
+#
+#   PROJECT_OPTIMIZATION_CFLAGS_DEBUG flags are only applied to DEBUG targets.
+#
+#		(default) PROJECT_OPTIMIZATION_CFLAGS_DEBUG = (blank)
+#
+#   Note: Before adding PROJECT_OPTIMIZATION_CFLAGS, please note that the 
+#   PLATFORM_OPTIMIZATION_CFLAGS defined in your platform specific configuration 
+#   file will be applied by default and further optimization flags here may not 
+#   be needed.
+#
+#   Note: Leave a leading space when adding list items with the += operator
+################################################################################
+# PROJECT_OPTIMIZATION_CFLAGS_RELEASE = 
+# PROJECT_OPTIMIZATION_CFLAGS_DEBUG = 
+
+################################################################################
+# PROJECT COMPILERS
+#   Custom compilers can be set for CC and CXX
+#		(default) PROJECT_CXX = (blank)
+#		(default) PROJECT_CC = (blank)
+#   Note: Leave a leading space when adding list items with the += operator
+################################################################################
+# PROJECT_CXX = 
+# PROJECT_CC = 

example_basics_frozen_graph/python/main.py

+
+import tensorflow as tf
+from tensorflow.python.framework.convert_to_constants import (
+    convert_variables_to_constants_v2,
+)
+
+input = tf.keras.Input(shape=(5,))
+output = tf.keras.layers.Dense(5, activation=tf.nn.relu)(input)
+output = tf.keras.layers.Dense(1, activation=tf.nn.sigmoid)(output)
+model = tf.keras.Model(inputs=input, outputs=output)
+
+# Create frozen graph
+x = tf.TensorSpec(model.input_shape, tf.float32, name="x")
+concrete_function = tf.function(lambda x: model(x)).get_concrete_function(x)
+frozen_model = convert_variables_to_constants_v2(concrete_function)
+
+# Check input/output node name
+print(f"{frozen_model.inputs=}")
+print(f"{frozen_model.outputs=}")
+
+# Save the graph as protobuf format
+directory = "."
+tf.io.write_graph(frozen_model.graph, directory, "model.pb", as_text=False)
\ No newline at end of file

example_basics_frozen_graph/python/requirements.txt

+tensorflow==1.14
\ No newline at end of file

example_basics_frozen_graph/src/main.cpp

+#include "ofMain.h"
+#include "ofApp.h"
+
+//========================================================================
+int main() {
+
+	ofSetupOpenGL(1024, 768, OF_WINDOW); // <-------- setup the GL context
+
+	// this kicks off the running of my app
+	// can be OF_WINDOW or OF_FULLSCREEN
+	// pass in width and height too:
+	ofRunApp(new ofApp());
+}

example_basics_frozen_graph/src/ofApp.cpp

+/*
+ * ofxTensorFlow2
+ *
+ * Copyright (c) 2021 ZKM | Hertz-Lab
+ * Paul Bethge <bethge@zkm.de>
+ * Dan Wilcox <dan.wilcox@zkm.de>
+ *
+ * BSD Simplified License.
+ * For information on usage and redistribution, and for a DISCLAIMER OF ALL
+ * WARRANTIES, see the file, "LICENSE.txt," in this distribution.
+ *
+ * This code has been developed at ZKM | Hertz-Lab as part of „The Intelligent 
+ * Museum“ generously funded by the German Federal Cultural Foundation.
+ */
+
+#include "ofApp.h"
+
+//--------------------------------------------------------------
+void ofApp::setup() {
+	ofSetFrameRate(60);
+	ofSetVerticalSync(true);
+	ofSetWindowTitle("example_basics_frozen_graph");
+
+	// create an input tensor of an arbitrary shape and fill it
+    auto input = cppflow::fill({10, 5}, 1.0f);
+
+	// set model type and i/o names
+	model.setModelType(cppflow::model::TYPE::FROZEN_GRAPH);
+	model.setup({{"x:0"}}, {{"Identity:0"}});
+
+	// load the model, bail out on error
+	if(!model.load("model.pb")) {
+		std::exit(EXIT_FAILURE);
+	}
+
+	// inference
+	auto output = model.runModel(input);
+
+	// use the ofxTF2 namespace for some useful functions like conversion
+	ofxTF2::tensorToVector(output, outputVector);
+	ofxTF2::tensorToVector(input, inputVector);
+
+	// print summary to console
+	ofLog() << "Flattened Input:";
+	ofLog() << ofxTF2::vectorToString(inputVector);
+	ofLog() << "Flattened Output:";
+	ofLog() << ofxTF2::vectorToString(outputVector);
+
+	// load a font for displaying strings
+	font.load(OF_TTF_SANS, 14);
+}
+
+//--------------------------------------------------------------
+void ofApp::update() {
+
+}
+
+//--------------------------------------------------------------
+void ofApp::draw() {
+
+	// draw summary to screen
+	font.drawString("Flattened Input:", 20, 20);
+	font.drawString(ofxTF2::vectorToString(inputVector), 40, 40);
+	font.drawString("Flattened Output:", 20, 60);
+	font.drawString(ofxTF2::vectorToString(outputVector), 40, 80);
+}
+
+//--------------------------------------------------------------
+void ofApp::keyPressed(int key) {
+
+}
+
+//--------------------------------------------------------------
+void ofApp::keyReleased(int key) {
+
+}
+
+//--------------------------------------------------------------
+void ofApp::mouseMoved(int x, int y) {
+
+}
+
+//--------------------------------------------------------------
+void ofApp::mouseDragged(int x, int y, int button) {
+
+}
+
+//--------------------------------------------------------------
+void ofApp::mousePressed(int x, int y, int button) {
+
+}
+
+//--------------------------------------------------------------
+void ofApp::mouseReleased(int x, int y, int button) {
+
+}
+
+//--------------------------------------------------------------
+void ofApp::mouseEntered(int x, int y) {
+
+}
+
+//--------------------------------------------------------------
+void ofApp::mouseExited(int x, int y) {
+
+}
+
+//--------------------------------------------------------------
+void ofApp::windowResized(int w, int h) {
+
+}
+
+//--------------------------------------------------------------
+void ofApp::gotMessage(ofMessage msg) {
+
+}
+
+//--------------------------------------------------------------
+void ofApp::dragEvent(ofDragInfo dragInfo) {
+
+}

example_basics_frozen_graph/src/ofApp.h

+/*
+ * ofxTensorFlow2
+ *
+ * Copyright (c) 2021 ZKM | Hertz-Lab
+ * Paul Bethge <bethge@zkm.de>
+ * Dan Wilcox <dan.wilcox@zkm.de>
+ *
+ * BSD Simplified License.
+ * For information on usage and redistribution, and for a DISCLAIMER OF ALL
+ * WARRANTIES, see the file, "LICENSE.txt," in this distribution.
+ *
+ * This code has been developed at ZKM | Hertz-Lab as part of „The Intelligent 
+ * Museum“ generously funded by the German Federal Cultural Foundation.
+ */
+
+#pragma once
+
+#include "ofMain.h"
+#include "ofxTensorFlow2.h"
+
+class ofApp : public ofBaseApp {
+
+	public:
+		void setup();
+		void update();
+		void draw();
+
+		void keyPressed(int key);
+		void keyReleased(int key);
+		void mouseMoved(int x, int y);
+		void mouseDragged(int x, int y, int button);
+		void mousePressed(int x, int y, int button);
+		void mouseReleased(int x, int y, int button);
+		void mouseEntered(int x, int y);
+		void mouseExited(int x, int y);
+		void windowResized(int w, int h);
+		void dragEvent(ofDragInfo dragInfo);
+		void gotMessage(ofMessage msg);
+
+		ofxTF2::Model model;
+		std::vector<float> inputVector;
+		std::vector<float> outputVector;
+		ofTrueTypeFont font;
+};