Predict Unity Help - 1.5 - Point Comparison

Predict Unity Help - 1.5

Point comparison module

The point comparison module is designed to analyse the value of different regions of interest in the image.

The window contains three widgets :

the settings widgets on the left contains settings to define the points and areas to analyse and the channel that are displayed in the data widget,
the preview widget on the top right contains a preview of the image : you can select a layer to display for visualization purposes but it won't have any impact on the data displayed in the data widget,
the data widget on the bottom right contains all the data concerning the selected points and areas.

Using this module, the save button has the following options :

LDR output : the processed output (the image currently displayed on screen) saved to a *.png file,
Point comparison datasheet : the data displayed in the data widget, saved to a *.csv file (this file can also be opened with Excel).

Point comparison data csv output

Regions of interest

You can define different kinds of regions of interest (ROI). Each ROI is defined by a type (point, rectangle, disc or line), a position and a size. The position and the size are given in pixel coordinates. When defining an area ROI (rectangle, disc or line), the average value of the area will be used.

You can select ROIs in the image by selecting the picking mode in the preview widget header and clicking on the image. Rectangles, discs and lines are defined by clicking two times on the images.

The buttons on the right part of the Region of Interest title enable you to :

load a list of ROI,
copy the current list of ROI to the clipboard,
save the current list of ROI to a *.csv file (can be opened in Excel),
reset the current list of ROI.

When using the "Point List" type (see bellow), you can edit an ROI in the data sheet : values are given in pixel coordinates, (0,0) represents the top left corner and (sizeX,sizeY) represents the bottom right corner. The type of an ROI is not editable. You can remove or duplicate an ROI from the list using the "-" and "+" buttons.

By placing your mouse over a ROI in the list, the ROI will be highlighted in red in the preview widget.

Point List

The point list is a list of custom ROIs.

Polyline

The poly-line is a broken line defined by a certain amount of breakpoints. Along this line, you can choose to analyse every pixel crossed by the line, or a given count of points. In the second case, the points will be regularly positioned between the first and the last point of the poly-line.

Grid

The grid defines points regularly positioned on the image. The grid dimension defines how many points are placed in the horizontal and vertical directions. The grid position defines the position of the first point of the grid in the image (in pixel coordinates). The grid size defines the gap between the first and the last point of the grid (in pixel coordinates).

You cannot duplicate or delete points when using the grid mode.

Displayed data

Datasheet

The default display mode is "Datasheet" : the selected ROIs informations are displayed in a datasheet. Each line contains the information for one ROI. You can define which layers are displayed in this datasheet in the settings widget. Some additional analysis lines can also be added (average, standard deviation,...).

Polyline curve

If you defined a poly-line ROI, you can display the values of the points along the line as a curve. The horizontal axis represents the position of the point on the poly-line. You can define which channel is displayed on the curve in the settings widget and choose to display additional analysis data (average).

Spectral curves

If the simulation contains spectral data, you can visualize them as curves. The horizontal axis represents the wavelength in the range [380;780]nm. You can choose which Stokes channel is displayed in the settings widget. You can also add some additional analysis data (average), and you can change the color map used to define each curve's color.

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