Description Usage Arguments Value Author(s) See Also Examples

View source: R/ImageAnalysis.R

Calculate the denseness (proportion of black pixel in relation to the total number of pixels) for a given number of samples.

1 2 3 4 5 | ```
denseness_sample(imagematrix, width_size, height_size, sample_width,
sample_height, method = "random", sample_shape = "rectangle",
n_samples = 10, n_sample_horizontal = 10, n_sample_vertical = 1,
proportion_horizontal = 1, proportion_vertical = 1,
aligin_horizontal = "center", aligin_vertical = "bottom")
``` |

`imagematrix` |
The matrix to be analysed. |

`width_size` |
Real size of image width (in mm, cm, m, etc..). |

`height_size` |
Real size of image height (in mm, cm, m, etc..). |

`sample_width` |
Width of sample area. |

`sample_height` |
Height of sample area. |

`method` |
Method for sample ("random" or "uniform"). |

`sample_shape` |
The shape of sample unity ("rectangle" or "ellipse"). See plot_samples function. |

`n_samples` |
Defines the number of samples, when sample_shape="random". |

`n_sample_horizontal` |
Defines the number of samples column, when sample_shape=" uniform". |

`n_sample_vertical` |
Defines the number of samples lines, when sample_shape=" uniform". |

`proportion_horizontal` |
Range from 0 to 1. Represent the proportion of horizontal plane to be sample. If proportion_horizontal=1 (default) all columns beacome potentially sample. |

`proportion_vertical` |
Range from 0 to 1. Represent the proportion of vertical plane to be sample. If proportion_vertical=1 (default) all lines become potentially sample. |

`aligin_horizontal` |
Define horizontal align. Three options are available: "center", "left" or "right". |

`aligin_vertical` |
Define vertical align. Three options are available: "middle","bottom" or "top". |

`Sample_denseness` |
Proportion of black pixels in samples. It do not take into account transparent pixels (when present).. |

`Height` |
Height of each sample (in mm, cm, m, etc. ..). Central point used as reference. |

`Distance(left)` |
Distance ti the left side of each sample (in mm, cm, m, etc. ..). Central point used as reference. |

`Matrix(line)` |
Imagem matrix line coordinates. |

`Matrix(column)` |
Imagem matrix column coordinates. |

Carlos Biagolini-Jr.

plot_samples

1 2 3 4 5 | ```
# Get a matrix from your image. Here examples provided by bwimage package.
bush<-system.file("extdata/bush.JPG",package ="bwimage")
bush<-threshold_color(bush, "jpeg", "proportional",compress_rate = 0.1)
denseness_sample(bush, width_size=100, height_size=100, sample_width=5, sample_height=5)
``` |

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