Table 1.
Abbreviations used in this survey.
| Abbreviation | Terms | Abbreviation | Terms |
|---|---|---|---|
| AA | Antioxidant Activity | MRI | Magnetic Resonance Imaging |
| AC | Ash Content | ms | millisecond |
| ANN | Artificial Neural Network | MSER | Maximally Stable Extremal Regions |
| AV | Anisidine Value | MVS | Machine Vision System |
| BN | Bayesian Network | NIR | Near Infrared |
| BP | Back Propagation | OCR | Optical Character Recognition |
| CCF | Comprehensive Color Feature | OCV | Optical Character Verification |
| CFS | Correlation based Feature Selection | PBR | Physically Based Rendering |
| CNN | Convolutional Neural Network | PCA | Principal Component Analysis |
| CV | Coefficient of Variation | PCR | Principal Component Regression |
| DSSAEs | Deep Stacked Sparse Auto-Encoders | PLS-DA | Partial Least Squares-Discriminant Analysis |
| DT | Decision Trees | PLSR | Partial Least Squares Regression |
| DWT | Discrete Wavelet Transform | PNN | Probabilistic Neural Network |
| ELMs | Extreme Learning Machines | PV | Peroxide Value |
| ExR | Excess Red | RGB | Red, Green, Blue |
| FA | Free Acidity | RID | Relative Internal Distance |
| FCA | Feature Color Areas | RMSE | Root-Mean-Square Error |
| FCM | Fuzzy C-means | ROI | Region of Interest |
| FCN | Fully Convolutional Network | RVM | Relevance Vector Machine |
| GDF | Gaussian Derivative Filtering | SIRI | Structured Illumination Reflectance Imaging |
| GLCM | Gray Level Co-occurrence Matrix | SLIC | Simple Linear Iterative Clustering |
| GLGCM | Gray Level-Gradient Co-occurrence Matrix | SMK | Sparse Multi-Kernel |
| GMM | Gaussian Mixture Model | SPA | Successive Projections Algorithm |
| HS | Histogram Statistics | SVM | Support Vector Machine |
| HSI | Hyperspectral Imaging | SVR | Support Vector Regression |
| ICA | Imperialist Competitive Algorithm | SWIR | Shortwave Infrared |
| KNN | K-Nearest Neighbours | TBARS | Thiobarbituric Acid Reactive Substances |
| LCTF | Liquid Crystal Tunable Filter | TOTOX | Total Oxidation |
| LDA | Linear Discriminant Analysis | TPC | Total Phenolic Content |
| LSSVM | Least Squares Support Vector Machine | UV | Ultraviolet |
| MADM | Multi Attribute Decision Making | UVE-SPA | Uninformative Variable Elimination and Successive Projections Algorithm |
| MD | Mahalanobis distance | VIS-NIR | Visible and Near Infrared |
| MLP | Multilayer Perceptron | YOLO | You Only Look Once |