def DSODTBPP512(input_shape=(512, 512, 3), softmax=True): """DenseNet based Architecture for TextBoxes++512. """ # DSOD body x = input_tensor = Input(shape=input_shape) source_layers = dsod512_body(x) num_maps = len(source_layers) # Add multibox head for classification and regression num_priors = [14] * num_maps normalizations = [1] * num_maps output_tensor = multibox_head(source_layers, num_priors, normalizations, softmax) model = Model(input_tensor, output_tensor) # parameters for prior boxes model.image_size = input_shape[:2] model.source_layers = source_layers model.aspect_ratios = [[1, 2, 3, 5, 1 / 2, 1 / 3, 1 / 5] * 2] * num_maps #model.shifts = [[(0.0, 0.0)] * 7 + [(0.0, 0.5)] * 7] * num_maps model.shifts = [[(0.0, -0.25)] * 7 + [(0.0, 0.25)] * 7] * num_maps model.special_ssd_boxes = False model.scale = 0.5 return model
def DSOD512(input_shape=(512, 512, 3), num_classes=21, activation='relu', softmax=True): """DSOD, DenseNet based SSD512 architecture. # Arguments input_shape: Shape of the input image. num_classes: Number of classes including background. activation: Type of activation functions. # References https://arxiv.org/abs/1708.01241 """ x = input_tensor = Input(shape=input_shape) source_layers = dsod512_body(x, activation=activation) num_priors = [4, 6, 6, 6, 6, 4, 4] normalizations = [20, 20, 20, 20, 20, 20, 20] output_tensor = multibox_head(source_layers, num_priors, num_classes, normalizations, softmax) model = Model(input_tensor, output_tensor) model.num_classes = num_classes # parameters for prior boxes model.image_size = input_shape[:2] model.source_layers = source_layers model.aspect_ratios = [[1,2,1/2], [1,2,1/2,3,1/3], [1,2,1/2,3,1/3], [1,2,1/2,3,1/3], [1,2,1/2,3,1/3], [1,2,1/2], [1,2,1/2]] model.minmax_sizes = [(35, 76), (76, 153), (153, 230), (230, 307), (307, 384), (384, 460), (460, 537)] model.steps = [8, 16, 32, 64, 128, 256, 512] model.special_ssd_boxes = True return model
def DSODSL512(input_shape=(512, 512, 3), activation='relu', softmax=True): """DenseNet based Architecture for SegLink512. # Arguments input_shape: Shape of the input image. # References https://arxiv.org/abs/1708.01241 """ # DSOD body x = input_tensor = Input(shape=input_shape) source_layers = dsod512_body(x, activation=activation) # Add multibox head for classification and regression num_priors = [1, 1, 1, 1, 1, 1, 1] normalizations = [20, -1, -1, -1, -1, -1, -1] output_tensor = multibox_head(source_layers, num_priors, normalizations, softmax) model = Model(input_tensor, output_tensor) # parameters for prior boxes model.image_size = input_shape[:2] model.source_layers = source_layers return model