OmniTek 2.3 User Manual

The controls in the panel enable the histograms to be displayed in different colour modes 
and as either a line or as a bar chart. You can also set the vertical scaling used for the 
histograms. 

Colour Mode 

The possible colour modes (selectable either from the Colour mode drop down in the 
panel or from the Colour mode menu) are: 

Histograms are generated in YCbCr space 

As above but after conversion to true SD levels 

Histograms are generated in RGB space 

Histograms are generated in Composite colour space 

Items may be displayed stacked vertically above each other (as shown here) or in parade 
form. In addition, selector boxes are associated with each of the above modes so that a 
subset of the items can be displayed if required. 

Graph Type 

The different graph types available are Bar, Line and Line (All). The last of these three 
options shows a single combined histogram. 

Vertical 

The vertical range sets the scale of the graph, and can be adjusted to suit your exact 
data. For most data, the best results will be obtained by ticking the Log button, which 
applies a logarithmic scaling to the vertical axis. Clicking the Auto button (after ticking or 
clearing Log) provides an easy way of selecting a suitable scale. 

The Options menu provides additional controls. In particular: 

Data 

This option switches RGB histograms between RGB and GBR ordering. 

Graticule 

The submenu associated with this option lets you toggle the visibility of the graticule, 
the labels on the graph and the summary information shown to the right of each 

graph. 

Split options  

These options allow you to select a Split view in which the section of each histogram that 
is currently being shown in detail is displayed alongside a representation of the full 
histogram with the currently-selected area marked out on it. The Split view position 
option controls whether the current selection is shown below the full histogram or to its 
right.