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<html><!-- Created using the cpp_pretty_printer from the dlib C++ library. See http://dlib.net for updates. --><head><title>dlib C++ Library - dnn_imagenet_ex.cpp</title></head><body bgcolor='white'><pre>
<font color='#009900'>// The contents of this file are in the public domain. See LICENSE_FOR_EXAMPLE_PROGRAMS.txt
</font><font color='#009900'>/*
This example shows how to classify an image into one of the 1000 imagenet
categories using the deep learning tools from the dlib C++ Library. We will
use the pretrained ResNet34 model available on the dlib website.
The ResNet34 architecture is from the paper Deep Residual Learning for Image
Recognition by He, Zhang, Ren, and Sun. The model file that comes with dlib
was trained using the <a href="dnn_imagenet_train_ex.cpp.html">dnn_imagenet_train_ex.cpp</a> program on a Titan X for
about 2 weeks. This pretrained model has a top5 error of 7.572% on the 2012
imagenet validation dataset.
For an introduction to dlib's DNN module read the <a href="dnn_introduction_ex.cpp.html">dnn_introduction_ex.cpp</a> and
<a href="dnn_introduction2_ex.cpp.html">dnn_introduction2_ex.cpp</a> example programs.
Finally, these tools will use CUDA and cuDNN to drastically accelerate
network training and testing. CMake should automatically find them if they
are installed and configure things appropriately. If not, the program will
still run but will be much slower to execute.
*/</font>
<font color='#0000FF'>#include</font> <font color='#5555FF'>&lt;</font>dlib<font color='#5555FF'>/</font>dnn.h<font color='#5555FF'>&gt;</font>
<font color='#0000FF'>#include</font> <font color='#5555FF'>&lt;</font>iostream<font color='#5555FF'>&gt;</font>
<font color='#0000FF'>#include</font> <font color='#5555FF'>&lt;</font>dlib<font color='#5555FF'>/</font>data_io.h<font color='#5555FF'>&gt;</font>
<font color='#0000FF'>#include</font> <font color='#5555FF'>&lt;</font>dlib<font color='#5555FF'>/</font>gui_widgets.h<font color='#5555FF'>&gt;</font>
<font color='#0000FF'>#include</font> <font color='#5555FF'>&lt;</font>dlib<font color='#5555FF'>/</font>image_transforms.h<font color='#5555FF'>&gt;</font>
<font color='#0000FF'>using</font> <font color='#0000FF'>namespace</font> std;
<font color='#0000FF'>using</font> <font color='#0000FF'>namespace</font> dlib;
<font color='#009900'>// ----------------------------------------------------------------------------------------
</font>
<font color='#009900'>// This block of statements defines the resnet-34 network
</font>
<font color='#0000FF'>template</font> <font color='#5555FF'>&lt;</font><font color='#0000FF'>template</font> <font color='#5555FF'>&lt;</font><font color='#0000FF'><u>int</u></font>,<font color='#0000FF'>template</font><font color='#5555FF'>&lt;</font><font color='#0000FF'>typename</font><font color='#5555FF'>&gt;</font><font color='#0000FF'>class</font>,<font color='#0000FF'><u>int</u></font>,<font color='#0000FF'>typename</font><font color='#5555FF'>&gt;</font> <font color='#0000FF'>class</font> <b><a name='block'></a>block</b>, <font color='#0000FF'><u>int</u></font> N, <font color='#0000FF'>template</font><font color='#5555FF'>&lt;</font><font color='#0000FF'>typename</font><font color='#5555FF'>&gt;</font><font color='#0000FF'>class</font> <b><a name='BN'></a>BN</b>, <font color='#0000FF'>typename</font> SUBNET<font color='#5555FF'>&gt;</font>
<font color='#0000FF'>using</font> residual <font color='#5555FF'>=</font> add_prev1<font color='#5555FF'>&lt;</font>block<font color='#5555FF'>&lt;</font>N,BN,<font color='#979000'>1</font>,tag1<font color='#5555FF'>&lt;</font>SUBNET<font color='#5555FF'>&gt;</font><font color='#5555FF'>&gt;</font><font color='#5555FF'>&gt;</font>;
<font color='#0000FF'>template</font> <font color='#5555FF'>&lt;</font><font color='#0000FF'>template</font> <font color='#5555FF'>&lt;</font><font color='#0000FF'><u>int</u></font>,<font color='#0000FF'>template</font><font color='#5555FF'>&lt;</font><font color='#0000FF'>typename</font><font color='#5555FF'>&gt;</font><font color='#0000FF'>class</font>,<font color='#0000FF'><u>int</u></font>,<font color='#0000FF'>typename</font><font color='#5555FF'>&gt;</font> <font color='#0000FF'>class</font> <b><a name='block'></a>block</b>, <font color='#0000FF'><u>int</u></font> N, <font color='#0000FF'>template</font><font color='#5555FF'>&lt;</font><font color='#0000FF'>typename</font><font color='#5555FF'>&gt;</font><font color='#0000FF'>class</font> <b><a name='BN'></a>BN</b>, <font color='#0000FF'>typename</font> SUBNET<font color='#5555FF'>&gt;</font>
<font color='#0000FF'>using</font> residual_down <font color='#5555FF'>=</font> add_prev2<font color='#5555FF'>&lt;</font>avg_pool<font color='#5555FF'>&lt;</font><font color='#979000'>2</font>,<font color='#979000'>2</font>,<font color='#979000'>2</font>,<font color='#979000'>2</font>,skip1<font color='#5555FF'>&lt;</font>tag2<font color='#5555FF'>&lt;</font>block<font color='#5555FF'>&lt;</font>N,BN,<font color='#979000'>2</font>,tag1<font color='#5555FF'>&lt;</font>SUBNET<font color='#5555FF'>&gt;</font><font color='#5555FF'>&gt;</font><font color='#5555FF'>&gt;</font><font color='#5555FF'>&gt;</font><font color='#5555FF'>&gt;</font><font color='#5555FF'>&gt;</font>;
<font color='#0000FF'>template</font> <font color='#5555FF'>&lt;</font><font color='#0000FF'><u>int</u></font> N, <font color='#0000FF'>template</font> <font color='#5555FF'>&lt;</font><font color='#0000FF'>typename</font><font color='#5555FF'>&gt;</font> <font color='#0000FF'>class</font> <b><a name='BN'></a>BN</b>, <font color='#0000FF'><u>int</u></font> stride, <font color='#0000FF'>typename</font> SUBNET<font color='#5555FF'>&gt;</font>
<font color='#0000FF'>using</font> block <font color='#5555FF'>=</font> BN<font color='#5555FF'>&lt;</font>con<font color='#5555FF'>&lt;</font>N,<font color='#979000'>3</font>,<font color='#979000'>3</font>,<font color='#979000'>1</font>,<font color='#979000'>1</font>,relu<font color='#5555FF'>&lt;</font>BN<font color='#5555FF'>&lt;</font>con<font color='#5555FF'>&lt;</font>N,<font color='#979000'>3</font>,<font color='#979000'>3</font>,stride,stride,SUBNET<font color='#5555FF'>&gt;</font><font color='#5555FF'>&gt;</font><font color='#5555FF'>&gt;</font><font color='#5555FF'>&gt;</font><font color='#5555FF'>&gt;</font>;
<font color='#0000FF'>template</font> <font color='#5555FF'>&lt;</font><font color='#0000FF'><u>int</u></font> N, <font color='#0000FF'>typename</font> SUBNET<font color='#5555FF'>&gt;</font> <font color='#0000FF'>using</font> ares <font color='#5555FF'>=</font> relu<font color='#5555FF'>&lt;</font>residual<font color='#5555FF'>&lt;</font>block,N,affine,SUBNET<font color='#5555FF'>&gt;</font><font color='#5555FF'>&gt;</font>;
<font color='#0000FF'>template</font> <font color='#5555FF'>&lt;</font><font color='#0000FF'><u>int</u></font> N, <font color='#0000FF'>typename</font> SUBNET<font color='#5555FF'>&gt;</font> <font color='#0000FF'>using</font> ares_down <font color='#5555FF'>=</font> relu<font color='#5555FF'>&lt;</font>residual_down<font color='#5555FF'>&lt;</font>block,N,affine,SUBNET<font color='#5555FF'>&gt;</font><font color='#5555FF'>&gt;</font>;
<font color='#0000FF'>template</font> <font color='#5555FF'>&lt;</font><font color='#0000FF'>typename</font> SUBNET<font color='#5555FF'>&gt;</font> <font color='#0000FF'>using</font> level1 <font color='#5555FF'>=</font> ares<font color='#5555FF'>&lt;</font><font color='#979000'>512</font>,ares<font color='#5555FF'>&lt;</font><font color='#979000'>512</font>,ares_down<font color='#5555FF'>&lt;</font><font color='#979000'>512</font>,SUBNET<font color='#5555FF'>&gt;</font><font color='#5555FF'>&gt;</font><font color='#5555FF'>&gt;</font>;
<font color='#0000FF'>template</font> <font color='#5555FF'>&lt;</font><font color='#0000FF'>typename</font> SUBNET<font color='#5555FF'>&gt;</font> <font color='#0000FF'>using</font> level2 <font color='#5555FF'>=</font> ares<font color='#5555FF'>&lt;</font><font color='#979000'>256</font>,ares<font color='#5555FF'>&lt;</font><font color='#979000'>256</font>,ares<font color='#5555FF'>&lt;</font><font color='#979000'>256</font>,ares<font color='#5555FF'>&lt;</font><font color='#979000'>256</font>,ares<font color='#5555FF'>&lt;</font><font color='#979000'>256</font>,ares_down<font color='#5555FF'>&lt;</font><font color='#979000'>256</font>,SUBNET<font color='#5555FF'>&gt;</font><font color='#5555FF'>&gt;</font><font color='#5555FF'>&gt;</font><font color='#5555FF'>&gt;</font><font color='#5555FF'>&gt;</font><font color='#5555FF'>&gt;</font>;
<font color='#0000FF'>template</font> <font color='#5555FF'>&lt;</font><font color='#0000FF'>typename</font> SUBNET<font color='#5555FF'>&gt;</font> <font color='#0000FF'>using</font> level3 <font color='#5555FF'>=</font> ares<font color='#5555FF'>&lt;</font><font color='#979000'>128</font>,ares<font color='#5555FF'>&lt;</font><font color='#979000'>128</font>,ares<font color='#5555FF'>&lt;</font><font color='#979000'>128</font>,ares_down<font color='#5555FF'>&lt;</font><font color='#979000'>128</font>,SUBNET<font color='#5555FF'>&gt;</font><font color='#5555FF'>&gt;</font><font color='#5555FF'>&gt;</font><font color='#5555FF'>&gt;</font>;
<font color='#0000FF'>template</font> <font color='#5555FF'>&lt;</font><font color='#0000FF'>typename</font> SUBNET<font color='#5555FF'>&gt;</font> <font color='#0000FF'>using</font> level4 <font color='#5555FF'>=</font> ares<font color='#5555FF'>&lt;</font><font color='#979000'>64</font>,ares<font color='#5555FF'>&lt;</font><font color='#979000'>64</font>,ares<font color='#5555FF'>&lt;</font><font color='#979000'>64</font>,SUBNET<font color='#5555FF'>&gt;</font><font color='#5555FF'>&gt;</font><font color='#5555FF'>&gt;</font>;
<font color='#0000FF'>using</font> anet_type <font color='#5555FF'>=</font> loss_multiclass_log<font color='#5555FF'>&lt;</font>fc<font color='#5555FF'>&lt;</font><font color='#979000'>1000</font>,avg_pool_everything<font color='#5555FF'>&lt;</font>
level1<font color='#5555FF'>&lt;</font>
level2<font color='#5555FF'>&lt;</font>
level3<font color='#5555FF'>&lt;</font>
level4<font color='#5555FF'>&lt;</font>
max_pool<font color='#5555FF'>&lt;</font><font color='#979000'>3</font>,<font color='#979000'>3</font>,<font color='#979000'>2</font>,<font color='#979000'>2</font>,relu<font color='#5555FF'>&lt;</font>affine<font color='#5555FF'>&lt;</font>con<font color='#5555FF'>&lt;</font><font color='#979000'>64</font>,<font color='#979000'>7</font>,<font color='#979000'>7</font>,<font color='#979000'>2</font>,<font color='#979000'>2</font>,
input_rgb_image_sized<font color='#5555FF'>&lt;</font><font color='#979000'>227</font><font color='#5555FF'>&gt;</font>
<font color='#5555FF'>&gt;</font><font color='#5555FF'>&gt;</font><font color='#5555FF'>&gt;</font><font color='#5555FF'>&gt;</font><font color='#5555FF'>&gt;</font><font color='#5555FF'>&gt;</font><font color='#5555FF'>&gt;</font><font color='#5555FF'>&gt;</font><font color='#5555FF'>&gt;</font><font color='#5555FF'>&gt;</font><font color='#5555FF'>&gt;</font>;
<font color='#009900'>// ----------------------------------------------------------------------------------------
</font>
rectangle <b><a name='make_random_cropping_rect_resnet'></a>make_random_cropping_rect_resnet</b><font face='Lucida Console'>(</font>
<font color='#0000FF'>const</font> matrix<font color='#5555FF'>&lt;</font>rgb_pixel<font color='#5555FF'>&gt;</font><font color='#5555FF'>&amp;</font> img,
dlib::rand<font color='#5555FF'>&amp;</font> rnd
<font face='Lucida Console'>)</font>
<b>{</b>
<font color='#009900'>// figure out what rectangle we want to crop from the image
</font> <font color='#0000FF'><u>double</u></font> mins <font color='#5555FF'>=</font> <font color='#979000'>0.466666666</font>, maxs <font color='#5555FF'>=</font> <font color='#979000'>0.875</font>;
<font color='#0000FF'>auto</font> scale <font color='#5555FF'>=</font> mins <font color='#5555FF'>+</font> rnd.<font color='#BB00BB'>get_random_double</font><font face='Lucida Console'>(</font><font face='Lucida Console'>)</font><font color='#5555FF'>*</font><font face='Lucida Console'>(</font>maxs<font color='#5555FF'>-</font>mins<font face='Lucida Console'>)</font>;
<font color='#0000FF'>auto</font> size <font color='#5555FF'>=</font> scale<font color='#5555FF'>*</font>std::<font color='#BB00BB'>min</font><font face='Lucida Console'>(</font>img.<font color='#BB00BB'>nr</font><font face='Lucida Console'>(</font><font face='Lucida Console'>)</font>, img.<font color='#BB00BB'>nc</font><font face='Lucida Console'>(</font><font face='Lucida Console'>)</font><font face='Lucida Console'>)</font>;
rectangle <font color='#BB00BB'>rect</font><font face='Lucida Console'>(</font>size, size<font face='Lucida Console'>)</font>;
<font color='#009900'>// randomly shift the box around
</font> point <font color='#BB00BB'>offset</font><font face='Lucida Console'>(</font>rnd.<font color='#BB00BB'>get_random_32bit_number</font><font face='Lucida Console'>(</font><font face='Lucida Console'>)</font><font color='#5555FF'>%</font><font face='Lucida Console'>(</font>img.<font color='#BB00BB'>nc</font><font face='Lucida Console'>(</font><font face='Lucida Console'>)</font><font color='#5555FF'>-</font>rect.<font color='#BB00BB'>width</font><font face='Lucida Console'>(</font><font face='Lucida Console'>)</font><font face='Lucida Console'>)</font>,
rnd.<font color='#BB00BB'>get_random_32bit_number</font><font face='Lucida Console'>(</font><font face='Lucida Console'>)</font><font color='#5555FF'>%</font><font face='Lucida Console'>(</font>img.<font color='#BB00BB'>nr</font><font face='Lucida Console'>(</font><font face='Lucida Console'>)</font><font color='#5555FF'>-</font>rect.<font color='#BB00BB'>height</font><font face='Lucida Console'>(</font><font face='Lucida Console'>)</font><font face='Lucida Console'>)</font><font face='Lucida Console'>)</font>;
<font color='#0000FF'>return</font> <font color='#BB00BB'>move_rect</font><font face='Lucida Console'>(</font>rect, offset<font face='Lucida Console'>)</font>;
<b>}</b>
<font color='#009900'>// ----------------------------------------------------------------------------------------
</font>
<font color='#0000FF'><u>void</u></font> <b><a name='randomly_crop_images'></a>randomly_crop_images</b> <font face='Lucida Console'>(</font>
<font color='#0000FF'>const</font> matrix<font color='#5555FF'>&lt;</font>rgb_pixel<font color='#5555FF'>&gt;</font><font color='#5555FF'>&amp;</font> img,
dlib::array<font color='#5555FF'>&lt;</font>matrix<font color='#5555FF'>&lt;</font>rgb_pixel<font color='#5555FF'>&gt;</font><font color='#5555FF'>&gt;</font><font color='#5555FF'>&amp;</font> crops,
dlib::rand<font color='#5555FF'>&amp;</font> rnd,
<font color='#0000FF'><u>long</u></font> num_crops
<font face='Lucida Console'>)</font>
<b>{</b>
std::vector<font color='#5555FF'>&lt;</font>chip_details<font color='#5555FF'>&gt;</font> dets;
<font color='#0000FF'>for</font> <font face='Lucida Console'>(</font><font color='#0000FF'><u>long</u></font> i <font color='#5555FF'>=</font> <font color='#979000'>0</font>; i <font color='#5555FF'>&lt;</font> num_crops; <font color='#5555FF'>+</font><font color='#5555FF'>+</font>i<font face='Lucida Console'>)</font>
<b>{</b>
<font color='#0000FF'>auto</font> rect <font color='#5555FF'>=</font> <font color='#BB00BB'>make_random_cropping_rect_resnet</font><font face='Lucida Console'>(</font>img, rnd<font face='Lucida Console'>)</font>;
dets.<font color='#BB00BB'>push_back</font><font face='Lucida Console'>(</font><font color='#BB00BB'>chip_details</font><font face='Lucida Console'>(</font>rect, <font color='#BB00BB'>chip_dims</font><font face='Lucida Console'>(</font><font color='#979000'>227</font>,<font color='#979000'>227</font><font face='Lucida Console'>)</font><font face='Lucida Console'>)</font><font face='Lucida Console'>)</font>;
<b>}</b>
<font color='#BB00BB'>extract_image_chips</font><font face='Lucida Console'>(</font>img, dets, crops<font face='Lucida Console'>)</font>;
<font color='#0000FF'>for</font> <font face='Lucida Console'>(</font><font color='#0000FF'>auto</font><font color='#5555FF'>&amp;</font><font color='#5555FF'>&amp;</font> img : crops<font face='Lucida Console'>)</font>
<b>{</b>
<font color='#009900'>// Also randomly flip the image
</font> <font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>rnd.<font color='#BB00BB'>get_random_double</font><font face='Lucida Console'>(</font><font face='Lucida Console'>)</font> <font color='#5555FF'>&gt;</font> <font color='#979000'>0.5</font><font face='Lucida Console'>)</font>
img <font color='#5555FF'>=</font> <font color='#BB00BB'>fliplr</font><font face='Lucida Console'>(</font>img<font face='Lucida Console'>)</font>;
<font color='#009900'>// And then randomly adjust the colors.
</font> <font color='#BB00BB'>apply_random_color_offset</font><font face='Lucida Console'>(</font>img, rnd<font face='Lucida Console'>)</font>;
<b>}</b>
<b>}</b>
<font color='#009900'>// ----------------------------------------------------------------------------------------
</font>
<font color='#0000FF'><u>int</u></font> <b><a name='main'></a>main</b><font face='Lucida Console'>(</font><font color='#0000FF'><u>int</u></font> argc, <font color='#0000FF'><u>char</u></font><font color='#5555FF'>*</font><font color='#5555FF'>*</font> argv<font face='Lucida Console'>)</font> <font color='#0000FF'>try</font>
<b>{</b>
<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>argc <font color='#5555FF'>=</font><font color='#5555FF'>=</font> <font color='#979000'>1</font><font face='Lucida Console'>)</font>
<b>{</b>
cout <font color='#5555FF'>&lt;</font><font color='#5555FF'>&lt;</font> "<font color='#CC0000'>Give this program image files as command line arguments.\n</font>" <font color='#5555FF'>&lt;</font><font color='#5555FF'>&lt;</font> endl;
cout <font color='#5555FF'>&lt;</font><font color='#5555FF'>&lt;</font> "<font color='#CC0000'>You will also need a copy of the file resnet34_1000_imagenet_classifier.dnn </font>" <font color='#5555FF'>&lt;</font><font color='#5555FF'>&lt;</font> endl;
cout <font color='#5555FF'>&lt;</font><font color='#5555FF'>&lt;</font> "<font color='#CC0000'>available at http://dlib.net/files/resnet34_1000_imagenet_classifier.dnn.bz2</font>" <font color='#5555FF'>&lt;</font><font color='#5555FF'>&lt;</font> endl;
cout <font color='#5555FF'>&lt;</font><font color='#5555FF'>&lt;</font> endl;
<font color='#0000FF'>return</font> <font color='#979000'>1</font>;
<b>}</b>
std::vector<font color='#5555FF'>&lt;</font>string<font color='#5555FF'>&gt;</font> labels;
anet_type net;
<font color='#BB00BB'>deserialize</font><font face='Lucida Console'>(</font>"<font color='#CC0000'>resnet34_1000_imagenet_classifier.dnn</font>"<font face='Lucida Console'>)</font> <font color='#5555FF'>&gt;</font><font color='#5555FF'>&gt;</font> net <font color='#5555FF'>&gt;</font><font color='#5555FF'>&gt;</font> labels;
<font color='#009900'>// Make a network with softmax as the final layer. We don't have to do this
</font> <font color='#009900'>// if we just want to output the single best prediction, since the anet_type
</font> <font color='#009900'>// already does this. But if we instead want to get the probability of each
</font> <font color='#009900'>// class as output we need to replace the last layer of the network with a
</font> <font color='#009900'>// softmax layer, which we do as follows:
</font> softmax<font color='#5555FF'>&lt;</font>anet_type::subnet_type<font color='#5555FF'>&gt;</font> snet;
snet.<font color='#BB00BB'>subnet</font><font face='Lucida Console'>(</font><font face='Lucida Console'>)</font> <font color='#5555FF'>=</font> net.<font color='#BB00BB'>subnet</font><font face='Lucida Console'>(</font><font face='Lucida Console'>)</font>;
dlib::array<font color='#5555FF'>&lt;</font>matrix<font color='#5555FF'>&lt;</font>rgb_pixel<font color='#5555FF'>&gt;</font><font color='#5555FF'>&gt;</font> images;
matrix<font color='#5555FF'>&lt;</font>rgb_pixel<font color='#5555FF'>&gt;</font> img, crop;
dlib::rand rnd;
image_window win;
<font color='#009900'>// Read images from the command prompt and print the top 5 best labels for each.
</font> <font color='#0000FF'>for</font> <font face='Lucida Console'>(</font><font color='#0000FF'><u>int</u></font> i <font color='#5555FF'>=</font> <font color='#979000'>1</font>; i <font color='#5555FF'>&lt;</font> argc; <font color='#5555FF'>+</font><font color='#5555FF'>+</font>i<font face='Lucida Console'>)</font>
<b>{</b>
<font color='#BB00BB'>load_image</font><font face='Lucida Console'>(</font>img, argv[i]<font face='Lucida Console'>)</font>;
<font color='#0000FF'>const</font> <font color='#0000FF'><u>int</u></font> num_crops <font color='#5555FF'>=</font> <font color='#979000'>16</font>;
<font color='#009900'>// Grab 16 random crops from the image. We will run all of them through the
</font> <font color='#009900'>// network and average the results.
</font> <font color='#BB00BB'>randomly_crop_images</font><font face='Lucida Console'>(</font>img, images, rnd, num_crops<font face='Lucida Console'>)</font>;
<font color='#009900'>// p(i) == the probability the image contains object of class i.
</font> matrix<font color='#5555FF'>&lt;</font><font color='#0000FF'><u>float</u></font>,<font color='#979000'>1</font>,<font color='#979000'>1000</font><font color='#5555FF'>&gt;</font> p <font color='#5555FF'>=</font> <font color='#BB00BB'>sum_rows</font><font face='Lucida Console'>(</font><font color='#BB00BB'>mat</font><font face='Lucida Console'>(</font><font color='#BB00BB'>snet</font><font face='Lucida Console'>(</font>images.<font color='#BB00BB'>begin</font><font face='Lucida Console'>(</font><font face='Lucida Console'>)</font>, images.<font color='#BB00BB'>end</font><font face='Lucida Console'>(</font><font face='Lucida Console'>)</font><font face='Lucida Console'>)</font><font face='Lucida Console'>)</font><font face='Lucida Console'>)</font><font color='#5555FF'>/</font>num_crops;
win.<font color='#BB00BB'>set_image</font><font face='Lucida Console'>(</font>img<font face='Lucida Console'>)</font>;
<font color='#009900'>// Print the 5 most probable labels
</font> <font color='#0000FF'>for</font> <font face='Lucida Console'>(</font><font color='#0000FF'><u>int</u></font> k <font color='#5555FF'>=</font> <font color='#979000'>0</font>; k <font color='#5555FF'>&lt;</font> <font color='#979000'>5</font>; <font color='#5555FF'>+</font><font color='#5555FF'>+</font>k<font face='Lucida Console'>)</font>
<b>{</b>
<font color='#0000FF'><u>unsigned</u></font> <font color='#0000FF'><u>long</u></font> predicted_label <font color='#5555FF'>=</font> <font color='#BB00BB'>index_of_max</font><font face='Lucida Console'>(</font>p<font face='Lucida Console'>)</font>;
cout <font color='#5555FF'>&lt;</font><font color='#5555FF'>&lt;</font> <font color='#BB00BB'>p</font><font face='Lucida Console'>(</font>predicted_label<font face='Lucida Console'>)</font> <font color='#5555FF'>&lt;</font><font color='#5555FF'>&lt;</font> "<font color='#CC0000'>: </font>" <font color='#5555FF'>&lt;</font><font color='#5555FF'>&lt;</font> labels[predicted_label] <font color='#5555FF'>&lt;</font><font color='#5555FF'>&lt;</font> endl;
<font color='#BB00BB'>p</font><font face='Lucida Console'>(</font>predicted_label<font face='Lucida Console'>)</font> <font color='#5555FF'>=</font> <font color='#979000'>0</font>;
<b>}</b>
cout <font color='#5555FF'>&lt;</font><font color='#5555FF'>&lt;</font> "<font color='#CC0000'>Hit enter to process the next image</font>";
cin.<font color='#BB00BB'>get</font><font face='Lucida Console'>(</font><font face='Lucida Console'>)</font>;
<b>}</b>
<b>}</b>
<font color='#0000FF'>catch</font><font face='Lucida Console'>(</font>std::exception<font color='#5555FF'>&amp;</font> e<font face='Lucida Console'>)</font>
<b>{</b>
cout <font color='#5555FF'>&lt;</font><font color='#5555FF'>&lt;</font> e.<font color='#BB00BB'>what</font><font face='Lucida Console'>(</font><font face='Lucida Console'>)</font> <font color='#5555FF'>&lt;</font><font color='#5555FF'>&lt;</font> endl;
<b>}</b>
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