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Questions tagged [triplet]

63 questions
39
votes
5 answers

STL-pair-like triplet class - do I roll my own?

I want to use a triplet class, as similar as possible to std::pair. STL doesn't seem to have one. I don't want to use something too heavy, like Boost. Is there some useful FOSS non-restrictive-license triplet class I could lift from somewhere?…
einpoklum
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How can I query rustc for the host triple?

When working with gcc, I can get what gcc thinks is my host's triplet by running gcc -dumpmachine. On my current system, this gives me x86_64-linux-gnu. How can I get stable rustc to print my host triple? (x86_64-unknown-linux-gnu in this…
Tenders McChiken
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9
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2 answers

Convert an Eigen matrix to Triplet form C++

I think Eigen uses compressed methods to store sparse matrices. Is there any way that I can extract Triplet-format vectors of an Eigen sparse matrix in from of std::vectors? Thanks. More info (an example of triplet format) Triplet format of matrix :…
Sina J
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1 answer

Evaluating (model.evaluate) with a triplet loss Siamese neural network model - tensorflow

I have trained a Siamese neural network that uses triplet loss. It was a pain, but I think I managed to do it. However, I am struggling to understand how to make evaluations with this model. The SNN: def triplet_loss(y_true, y_pred): margin =…
maxipod
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6
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2 answers

How to determine accuracy with triplet loss in a convolutional neural network

A Triplet network (inspired by "Siamese network") is comprised of 3 instances of the same feed-forward network (with shared parameters). When fed with 3 samples, the network outputs 2 intermediate values - the L2 (Euclidean) distances between the…
Hello Lili
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5
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Keras: triplet loss with positive and negative sample within batch

I try to refactor my Keras code to use 'Batch Hard' sampling for the triplets, as proposed in https://arxiv.org/pdf/1703.07737.pdf. " the core idea is to form batches by randomly sampling P classes (person identities), and then randomly sampling…
Derk
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1 answer

How to implement a filter in tensorflow?

I have a convolutional neural network with three images as inputs: x_anchor = tf.placeholder('float', [None, 4900], name='x_anchor') x_positive = tf.placeholder('float', [None, 4900], name='x_positive') x_negative = tf.placeholder('float', [None,…
Hello Lili
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1 answer

How to implement A = sparse(I, J, K) (sparse matrix from triplet) in a Fortran mex file?

I'm trying to create a sparse square matrix in Matlab through a mex function (written in Fortran). I want something like A = sparse(I,J,K) . My triplets look like this, there are repetitions among the entries femi = [1, 2, 3, 2, 2, 4, 5, 5, 4, 6, 6,…
Kadiya
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3
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Triplet Network, loss function and equal distances

I'm currently implementing a triplet network to recognise if two images are describing the same 3d-model or not, but I have some problems with the results, the distances between anchor-positive is always equal to the distance between…
Tbertin
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Reshape data obtained using TriMatch package in R to another data keeping matched triplets serial ID for further analysis

How can I reshape data A (obtained using TriMatch package in R) to data B and keep matched triplets serial ID to allow further analysis? Used code to get data A and its structure: formu <- ~ Age+FEMALE+renal_insuf+Diabetes+MI+LVEF_pre+ Crea+…
Mohamed Rahouma
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Could someone explain me what's behind the FaceNet Paper ? (one-shot learning, siamese network and triplet loss)

I'm struggling since about 3 weeks on my One-Shot learning project. I'm trying to unlock my computer with my face. Unfortunately, I'm far from this task. First, I wanted to understand well the concepts behind one-shot learning and especially triplet…
ThOpaque
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1 answer

Loss nan for triplet loss Tensorflow

I'm trying to train a triplet loss model in TensorFlow (tensorflow==1.13.1) but the loss goes to NAN after the first iteration. I already read a lot of tips from this forum but nothing has worked so far. Smaller learning rate (changed 0.01 to…
Andreas Verschuere
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How to deal with triplet loss when at time of input I have only a json file of ID with 512 dimensonal vector?

I have a file json with vectors generated from InsightFace with MXNet like this: {"id": "huonght", "vector": "[-0.0591206625,-0.0562381446,...,0.0173285864,0.0403193906]} {"id": "huonght", "vector":…
Phạm Minh Huy
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Not able to train Resnet model with tripletloss, while VGG16 works, why?

I am trying to do a transfer learning with ResNet50V2 model using triplet loss function. I have kept Include_top = False, input shape = (160,160,3) with Imagenet weights. The last 3 layers of my model is shown in the below image with 6 million…
Soma Sundaram
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2
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2 answers

Find unique triplets

In my function I have to find all unique triplets to given numbers K from given array. It finds all triplets but many of them are there twice or more like 1 1 5 is same as 1 5 1 or 5 1 1 and etc. Can somebody help me with this? int triplet(int…
blackroad
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