Files in directory etc/transformer/statistics from the latest check-in of branch trunk
- by-bands.tcl
- by-columns.tcl
- by-rows.tcl
- by-tiles.tcl
- cumulation.tcl
- histogram.tcl
- otsu.tcl
- rank-order.tcl
- README.md
Image statistics
These are here, under Transformers, because they compute results per row, column, band or tile, and return them as an image.
We have
| Op | Result per unit (row, column, band, tile) |
|---|---|
| arg.max | First index where the maximal value is reached |
| arg.min | First index where the minimal value is reached |
| arg.ge | First index where value greater or equal than threshold |
| arg.gt | First index where value greater than threshold |
| arg.le | First index where value less or equal than threshold |
| arg.lt | First index where value less than threshold |
| cumulative | A prefix sum over the unit |
| histogram | Histogram of the unit |
| max | The maximum of the values |
| mean | The arithmetic mean of the values |
| median | The median of the values |
| min | The minimum of the values |
| otsu | The otsu threshold for the values |
| rank | The value of the specified rank of the values |
| stddev | The standard deviation of the values |
| sum | The sum of all values |
| sumsquared | The sum of all squared values |
| variance | The variance of the values |
| profile | Top/Left profile of the unit |
Note that not all operations are sensible for all units.
Note that the index operations are useful to feed take operators.