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Hoku Levels

Hoku has three levels: Basic, Intermediate, and Advanced. The level controls which modules appear in the Cupboard. Each level keeps every module from the level below it and adds new ones, so the Advanced level shows all of them.

Basic is the default level. The first time you start Hoku, it opens in Basic. You can change levels at any time from the Cupboard's Algorithm Level menu; see Changing Hoku Level.

Basic Level

  • Read, write, and display images
  • Change image size or orientation
  • Enhance low-contrast information
  • Analyze spectral image data (PCA)

Basic modules →

Intermediate Level

  • Create and display color images (AccuColor)
  • Change pixel values with image math
  • More enhancement and spectral analysis (ICA, MNF, SAM, SID, Slope, BandRatios)
  • Flowcharts to run a job on many images or directories

Intermediate modules →

Advanced Level

  • Image calibration
  • Image analysis tools (Histogram, Spectra, Statistics)
  • Flat fielding and registration
  • Conditional flowcharts (if, yes, no)

Advanced modules →

Modules added at each level

Category Basic Intermediate adds Advanced adds
Read, write, display ReadImage, WriteImage, Show AccuColor, Curtain, Combine Align, ColorRGB, Pattern, Print, WriteStack
Change size, orientation Crop, Scale, Append, Rotate – Insert, Register
Change values – ImageMath, Power, Sobel BandMath, Imfill, Flatten
Enhance appearance Pack, Stretch, Invert, Blur, Sharpen Normalize, BlurDivide, Median, Saturation, TRC Pseudocolor, Sharpie, Watermark
Spectral analysis ReadStack, PCA ICA, MNF, SAM, SID, Slope, BandRatios –
Image analysis – – Header, Histogram, History, Spectra, Statistics
Flowcharts – start, cd, ls, rpt, exec, mkdir, pause, end if, yes, no
Modules shown 14 39 60

Can't find a module in your Cupboard? Look it up in the table above and switch to the level that adds it.

Plugins (Hoku 3.2): a plugin module appears at the level its author declared in it; Hoku will not install a plugin that does not declare one.

Levels were introduced in Hoku 3.0. This page reflects Hoku 3.1, plus BandRatios from Hoku 3.2.