A semantic segmentation model outputs a tensor shaped [Batch_size,Channel(Number of Classes),Img_Height,Img_Width] (If using Pytorch), but if you convert that to a TensorRT engine for faster inference, the output is flattened to a 1d array. Therefore the shaping being, [(Batch_size)X(Channel)X(Img_Height)X(Img_Width),] Considering…
Unet++ is useful when you want to improve image segmentation accuracy. This was first designed for medical use where accuracies are critical. In a nutshell, Unet++ adds convolution layers between skip connection. The original Unet skip connect without any additional…
I’ve quantitatively evaluated binary segmentation models using IOU as my metric. The reason why I used IoU is because IoU penalizes a single instance of classification error more compared to other metrics such as f1 scores, therefore lowering the value.…
I’ve compared Image segmentation performance depending on the loss function. Mean Squared Error Binary Cross Entropy I was able to achieve higher average IOU using BCE instead of MSE.
I’ve experimented how standardization affect a binary segmentation model’s performance by comparing 2 outputs. Inference result from model trained with standardization using ImageNet RGB mean and standard deviation Inference result from model trained without standardization I’ve found out that the…
When I was evaluating the model, both f1 score and jaccard score, for some reason, was decreasing as the model finishes more epochs. (Which is quite insane.) I’ve been checking the dimensions of the variables I was using to calculate…
When testing out your model’s output for computer vision tasks, you’ll need to apply the same preprocessing methods you’ve applied during training, to the images you want to test out. Here is one way to implement. Import Images from PIL…
Depending on the loss function, you might need to change the data structure of the tensor coming out from the model. In my case, I’m currently doing a binary semantic segmentation using pytorch, and the output of the model is…
I’ve learned that, for semantic segmentation, the Binary Cross Entropy as the loss function, instead of MSE, might be the one to first test out. Motivation When you check the derivative for MSE(Mean Squared Error)’s cost function, you’ll notice that…
Labeling 3d data points manually can be time-consuming and has a high chance of mistaking. So instead of labeling each point like the picture on the left side, using clustering can help you group similar data points first and then…