# Model Accuracy

Encord Computer Vision Glossary

## Model accuracy

Model accuracy is a measure of how well a machine learning (ML) model is able to make predictions or decisions based on data. It is a common metric used to evaluate the performance of ML models, and can be used to compare the performance of different models or to assess the effectiveness of a particular model for a given task.

There are several different ways to measure model accuracy, depending on the type of ML model and the nature of the problem being solved. Some common methods include classification accuracy, mean squared error, and mean absolute error.

Classification accuracy is a common measure of model accuracy for classification tasks, and is defined as the proportion of correct predictions made by the model. It is typically calculated by dividing the number of correct predictions by the total number of predictions made by the model.

Mean squared error (MSE) and mean absolute error (MAE) are commonly used to measure the accuracy of regression models, which are used to predict continuous values. MSE is defined as the average of the squared differences between the predicted values and the true values, while MAE is defined as the average of the absolute differences between the predicted values and the true values.

In addition to these metrics, it is also common to use other measures of model accuracy, such as precision, recall, and the F1 score, which are particularly useful for imbalanced classification tasks.

Overall, model accuracy is an important metric for evaluating the performance of ML models, and is used to assess the effectiveness of different models and to compare their performance.

## How do you measure model accuracy for computer vision?

There are several different ways to measure model accuracy, depending on the type of ML model and the nature of the problem being solved. Some common methods include classification accuracy, mean squared error, and mean absolute error.

Classification accuracy is a common measure of model accuracy for classification tasks, and is defined as the proportion of correct predictions made by the model. It is typically calculated by dividing the number of correct predictions by the total number of predictions made by the model.

Mean squared error (MSE) and mean absolute error (MAE) are commonly used to measure the accuracy of regression models, which are used to predict continuous values. MSE is defined as the average of the squared differences between the predicted values and the true values, while MAE is defined as the average of the absolute differences between the predicted values and the true values.

In addition to these metrics, it is also common to use other measures of model accuracy, such as precision, recall, and the F1 score, which are particularly useful for imbalanced classification tasks.

Overall, model accuracy is an important metric for evaluating the performance of ML models, and is used to assess the effectiveness of different models and to compare their performance.