Statistical Learning
Plant Disease Detection Using Image Processing and Machine Learning
Kulkarni, Pranesh, Karwande, Atharva, Kolhe, Tejas, Kamble, Soham, Joshi, Akshay, Wyawahare, Medha
One of the important and tedious task in agricultural practices is the detection of the disease on crops. It requires huge time as well as skilled labor. This paper proposes a smart and efficient technique for detection of crop disease which uses computer vision and machine learning techniques. The proposed system is able to detect 20 different diseases of 5 common plants with 93% accuracy.
17 Clustering Algorithms Used In Data Science & Mining.
"if you want to go quickly, go alone; if you want to go far, go together." Quick note: If you are reading this article through a chromium-based browser (e.g., Google Chrome, Chromium, Brave), the following TOC would work fine. However, it is not the case for other browsers like Firefox, in which you need to click each link twice to get to the intended section. As always, everything written and visualized were created by the author unless it was specified. As information becomes increasingly important and accessible to people all around the globe, more and more data science and machine learning methods have been developed. The cluster analysis model may look simple at first glance, but it is crucial to understand how to deal with enormous data.
Support Vector Machine: Introduction - Analytics Vidhya
In this article, we will be discussing Support Vector Machines. Before we proceed, I hope you already have some prior knowledge about Linear Regression and Logistic Regression. If you want to learn Logistic Regression, you can click here. You can also check its implementation here. By the end of this article., you will get to know the basics involved in the Support Vector Machine.
Support Vector Machines in Python
Please consider watching this video if any section of this article is unclear. How to set up your programming environment can be found at the start of: Episode 4.3 We can now use the support vector machine to classify apples and oranges given the fruit's weight and size. For example -- let's say we recorded a fruit to have a weight of 70 grams and size of 4.6cm. We obtain a prediction of this fruit being an orange. Looking at the graph in the scatterplot above we note the recording of 70 grams and size of 4.6cm lies below the hyperplane, hence an orange is predicted.
Data Science: Machine Learning
Perhaps the most popular data science methodologies come from machine learning. What distinguishes machine learning from other computer guided decision processes is that it builds prediction algorithms using data. Some of the most popular products that use machine learning include the handwriting readers implemented by the postal service, speech recognition, movie recommendation systems, and spam detectors. In this course, part of our Professional Certificate Program in Data Science, you will learn popular machine learning algorithms, principal component analysis, and regularization by building a movie recommendation system. You will learn about training data, and how to use a set of data to discover potentially predictive relationships.
3 Low-Code Machine Learning Libraries that You Should Know About
Some of my most popular blogs on Medium are about libraries that I believe you should try. In this blog, I will focus on low-code machine learning libraries. The truth is that many data scientists believe that low-code libraries are shortcuts and should be avoided. I'm afraid I have to disagree! I think that low-code libraries should be included in our pipeline to help us make important decisions without wasting time.
Post Selections Using Test Sets (PSUTS) and How Developmental Networks Avoid Them
For example, a "what" concept is "where"-invariant and a "where" concept is "what"-invariant, as explained in [55], [68]. Section IV discusses an optimal framework through which such abstractions can take place from learning simple rules during early life that enable learning of more complex rules during later life-- called scaffolding [69]. Theorem 2 leads to two observations on data fitting on a static data set: Observation 1: Any data fitting on a static data set without learning invariant concepts are nonscalable, including the n-fold cross-validation discussed below. Unfortunately, data fitting on a static data set is a norm in all ImageNet Contests [66]. Namely, the remaining subsections in this section analyze approaches that are nonscalable. For example, computer vision is not a "one-shot" pattern classification problem as argued by Li Fei-Fei et al. [19] (which was questioned in PubMed without responses), but rather a spatiotemporal problem to learn various invariant concepts present in cluttered natural scenes through autonomous attention saccades, as explained further in Observation 2. Observation 2: Learning invariant concepts seem nonscalable for any data fitting on a static data set either, because there are too many images to be labeled by hand (e.g., all pixel locations) [55], [68]. Like a human baby, any scalable machine learning methods must be conscious through which the machine learner must consciously guess concepts (i.e., not just active learning [70]) (e.g., an object type) and verify their invariance rules (e.g., the where-invariance of a what concept).
Improving Label Quality by Jointly Modeling Items and Annotators
Weerasooriya, Tharindu Cyril, Ororbia, Alexander G., Homan, Christopher M.
We propose a fully Bayesian framework for learning ground truth labels from noisy annotators. Our framework ensures scalability by factoring a generative, Bayesian soft clustering model over label distributions into the classic David and Skene joint annotator-data model. Earlier research along these lines has neither fully incorporated label distributions nor explored clustering by annotators only or data only. Our framework incorporates all of these properties as: (1) a graphical model designed to provide better ground truth estimates of annotator responses as input to \emph{any} black box supervised learning algorithm, and (2) a standalone neural model whose internal structure captures many of the properties of the graphical model. We conduct supervised learning experiments using both models and compare them to the performance of one baseline and a state-of-the-art model.
EMG Signal Classification Using Reflection Coefficients and Extreme Value Machine
Azhiri, Reza Bagherian, Esmaeili, Mohammad, Jafarzadeh, Mohsen, Nourani, Mehrdad
Electromyography is a promising approach to the gesture recognition of humans if an efficient classifier with high accuracy is available. In this paper, we propose to utilize Extreme Value Machine (EVM) as a high-performance algorithm for the classification of EMG signals. We employ reflection coefficients obtained from an Autoregressive (AR) model to train a set of classifiers. Our experimental results indicate that EVM has better accuracy in comparison to the conventional classifiers approved in the literature based on K-Nearest Neighbors (KNN) and Support Vector Machine (SVM).
Learning and Generalization in Overparameterized Normalizing Flows
Shah, Kulin, Deshpande, Amit, Goyal, Navin
In supervised learning, it is known that overparameterized neural networks with one hidden layer provably and efficiently learn and generalize, when trained using stochastic gradient descent with sufficiently small learning rate and suitable initialization. In contrast, the benefit of overparameterization in unsupervised learning is not well understood. Normalizing flows (NFs) constitute an important class of models in unsupervised learning for sampling and density estimation. In this paper, we theoretically and empirically analyze these models when the underlying neural network is one-hidden-layer overparameterized network. Our main contributions are two-fold: (1) On the one hand, we provide theoretical and empirical evidence that for a class of NFs containing most of the existing NF models, overparametrization hurts training. (2) On the other hand, we prove that unconstrained NFs, a recently introduced model, can efficiently learn any reasonable data distribution under minimal assumptions when the underlying network is overparametrized.