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"""Functions to draw a caffe NetParameter protobuffer.
"""
import pydot
# Internal layer and blob styles.
LAYER_STYLE = {'shape': 'record', 'fillcolor': '#6495ED',
'style': 'filled,bold'}
NEURON_LAYER_STYLE = {'shape': 'record', 'fillcolor': '#90EE90',
'style': 'filled,bold'}
BLOB_STYLE = {'shape': 'octagon', 'fillcolor': '#F0E68C',
'style': 'filled'}
def get_pydot_graph(caffe_net):
pydot_graph = pydot.Dot(caffe_net.name, graph_type='digraph')
pydot_nodes = {}
pydot_edges = []
for layer in caffe_net.layers:
name = layer.layer.name
layertype = layer.layer.type
if (len(layer.bottom) == 1 and len(layer.top) == 1 and
layer.bottom[0] == layer.top[0]):
# We have an in-place neuron layer.
pydot_nodes[name + '_' + layertype] = pydot.Node(
'%s (%s)' % (name, layertype), **NEURON_LAYER_STYLE)
else:
pydot_nodes[name + '_' + layertype] = pydot.Node(
'%s (%s)' % (name, layertype), **LAYER_STYLE)
for bottom_blob in layer.bottom:
pydot_nodes[bottom_blob + '_blob'] = pydot.Node(
'%s' % (bottom_blob), **BLOB_STYLE)
pydot_edges.append((bottom_blob + '_blob', name + '_' + layertype))
for top_blob in layer.top:
pydot_nodes[top_blob + '_blob'] = pydot.Node(
'%s' % (top_blob))
pydot_edges.append((name + '_' + layertype, top_blob + '_blob'))
# Now, add the nodes and edges to the graph.
for node in pydot_nodes.values():
pydot_graph.add_node(node)
for edge in pydot_edges:
pydot_graph.add_edge(
pydot.Edge(pydot_nodes[edge[0]], pydot_nodes[edge[1]]))
return pydot_graph
def draw_net(caffe_net, ext='png'):
"""Draws a caffe net and returns the image string encoded using the given
extension.
Input:
caffe_net: a caffe.proto.caffe_pb2.NetParameter protocol buffer.
ext: the image extension. Default 'png'.
"""
return get_pydot_graph(caffe_net).create(format=ext)
def draw_net_to_file(caffe_net, filename):
"""Draws a caffe net, and saves it to file using the format given as the
file extension. Use '.raw' to output raw text that you can manually feed
to graphviz to draw graphs.
"""
ext = filename[filename.rfind('.')+1:]
with open(filename, 'w') as fid:
fid.write(draw_net(caffe_net, ext))
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