change 'classWeights' in unetLayers
7 visualizzazioni (ultimi 30 giorni)
Mostra commenti meno recenti
Marco Festugato
il 16 Set 2019
Commentato: Timothy Lee
il 8 Giu 2020
Hello,
im using Unet to perform semantic segmentation (I want to segment liver metastasis). I want to weight 'more' the pixels of the metastasis respect to the background but I can't manage to do it...
Code for creating unet architecture:
lgraph = unetLayers(imageSize, numClasses, 'EncoderDepth', 4);
How can I change the 'classWeights' in lgraph.Layers(end).pixelClassificationLayer in order to do this??
If, for example, I do this:
lgraph.Layers(end).pixelClassificationLayer.classWeights = [2, 0.5];
I receive an error telling me that i have first to put the 'labels' to the 'classes' options in lgraph.Layers(end), but if i do this:
lgraph.Layers(end) = {'metastasis', 'background'};
I receive an error telling that that layer is in 'read only' mode....
Please im getting crazy...
Thanks in advance for any help!
0 Commenti
Risposta accettata
Raunak Gupta
il 19 Set 2019
Hi,
The unetLayers object in MATLAB is in read only mode and we cannot change the properties of layers as such. You may remove the last layer which is the Segmentation-Layer and can add a new Segmentation-Layer with the properties that are mentioned. Following Code will help.
% Last Layer Name is 'Segmentation-Layer'
% for checking layer name use :- lgraph.Layers
lgraph = removeLayers(lgraph,'Segmentation-Layer');
layerlast = pixelClassificationLayer('Classes',{'metastatis','background'},'ClassWeights',[2,0.5],'Name','New_segmentation_Layer');
layer_to_add = [layerlast];
lgraph = addLayers(lgraph,layer_to_add);
2 Commenti
Timothy Lee
il 8 Giu 2020
By using pixelClassificationLayer with class weights, is this the same as implementing a custom weighted classification layer, as shown in this example:
Più risposte (0)
Vedere anche
Categorie
Scopri di più su Recognition, Object Detection, and Semantic Segmentation in Help Center e File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!