add_samples_image_class_mlp — Add training samples from an image to the training data of a multilayer perceptron.
add_samples_image_class_mlp adds training samples from the image Image to the multilayer perceptron (MLP) given by MLPHandle. add_samples_image_class_mlp is used to store the training samples before a classifier to be used for the pixel classification of multichannel images with classify_image_class_mlp is trained. add_samples_image_class_mlp works analogously to add_sample_class_mlp. Because here the MLP is always used for classification, OutputFunction = 'softmax' must be specified when the MLP is created with create_class_mlp. The image Image must have a number of channels equal to NumInput, as specified with create_class_mlp. The training regions for the NumOutput pixel classes are passed in ClassRegions. Hence, ClassRegions must be a tuple containing NumOutput regions. The order of the regions in ClassRegions determines the class of the pixels. If there are no samples for a particular class in Image an empty region must be passed at the position of the class in ClassRegions. With this mechanism it is possible to use multiple images to add training samples for all relevant classes to the MLP by calling add_samples_image_class_mlp multiple times with the different images and suitably chosen regions. The regions in ClassRegions should contain representative training samples for the respective classes. Hence, they need not cover the entire image. The regions in ClassRegions should not overlap each other, because this would lead to the fact that in the training data the samples from the overlapping areas would be assigned to multiple classes, which may lead to slower convergence of the training and a lower classification performance.
Regions of the classes to be trained.
If the parameters are valid, the operator add_samples_image_class_mlp returns the value 2 (H_MSG_TRUE). If necessary an exception is raised.
classify_image_class_mlp, add_sample_class_mlp, clear_samples_class_mlp, get_sample_num_class_mlp, get_sample_class_mlp, add_samples_image_class_svm