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Cuboid

Cuboidal region of interest

Description

A Cuboid object specifies the shape and position of a 3-D cuboidal region of interest (ROI). You can customize the appearance and interactive behavior of the ROI.

For more information about using this ROI, including keyboard shortcuts and a right-click context menu, see Tips.

Blue Cuboid ROI drawn over a 3-D region in a point cloud.

Creation

There are two ways to create a Cuboid object. For more information, see Create ROI Shapes.

  • Use the drawcuboid function. Use this function when you want to create the ROI and set the appearance in a single command. You can specify the shape and position of the ROI interactively by drawing the ROI over an image using the mouse, or programmatically by using name-value arguments.

  • Use the images.roi.Cuboid function described here. Use this function when you want to specify the appearance and behavior of the ROI before you specify the shape and position of the ROI. After creating the object, you can specify the shape and position interactively by using the draw function or programmatically by modifying properties of the object.

Description

example

roi = images.roi.Cuboid creates a Cuboid object with default properties.

roi = images.roi.Cuboid(ax) creates an ROI in the axes specified by ax.

roi = images.roi.Cuboid(___,Name,Value) sets properties using name-value arguments. You can specify multiple name-value arguments. Enclose each property name in single quotes.

Example: images.roi.Cuboid('Color','y') creates a yellow colored Cuboid object.

Input Arguments

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Parent of ROI, specified as an Axes object or a UIAxes object. For information about using an ROI in a UIAxes, including important limitations, see Using ROIs in Apps Created with App Designer.

Properties

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ROI color, specified as an RGB triplet, a color name, or a short color name.

You can specify any color using an RGB triplet. An RGB triplet is a 3-element row vector whose elements specify the intensities of the red, green, and blue components of the color. The intensities must be in the range [0,1].

You can specify some common colors by name as a string scalar or character vector. This table lists the named color options and the equivalent RGB triplets.

Color NameShort NameRGB TripletAppearance
'red''r'[1 0 0]

A rectangle colored pure red

'green''g'[0 1 0]

A rectangle colored pure green

'blue''b'[0 0 1]

A rectangle colored pure blue

'cyan' 'c'[0 1 1]

A rectangle colored pure cyan

'magenta''m'[1 0 1]

A rectangle colored pure magenta

'yellow''y'[1 1 0]

A rectangle colored pure yellow

'black''k'[0 0 0]

A rectangle colored black

'white''w'[1 1 1]

A rectangle colored white

Here are the RGB triplets for the default colors that MATLAB® uses in many types of plots.

RGB TripletAppearance
[0 0.4470 0.7410]

A rectangle colored medium blue

[0.8500 0.3250 0.0980]

A rectangle colored reddish-orange

[0.9290 0.6940 0.1250]

A rectangle colored dark yellow

[0.4940 0.1840 0.5560]

A rectangle colored dark purple

[0.4660 0.6740 0.1880]

A rectangle colored light green

[0.3010 0.7450 0.9330]

A rectangle colored light blue

[0.6350 0.0780 0.1840]

A rectangle colored dark red

Example: 'Color','r'

Example: 'Color','green'

Example: 'Color',[0 0.4470 0.7410]

Context menu that displays when you right-click the ROI, specified as a ContextMenu object. You can create a custom context menu by using the uicontextmenu function and then configuring context menu properties.

Context menu provides an option to delete the ROI, specified as true or false. When the value is true, you can delete the ROI interactively using the context menu. When the value is false, the context menu option to delete the ROI is disabled.

In both cases, you can delete the ROI outside of the context menu by using the delete function.

Area of the axes in which you can interactively place the ROI, specified as one of the values in this table.

ValueDescription
'auto'

The drawing area is a superset of the current axes limits and a bounding box that surrounds the ROI (default).

'unlimited'The drawing area has no boundary and ROIs can be drawn or dragged to extend beyond the axes limits.
[x,y,z,w,h,d]The drawing area is restricted to a region beginning at (x,y,z), with width w, height h, and depth d.

Transparency of ROI edge, specified as a number in the range [0, 1]. When set to 1, the ROI edge is completely opaque. When set to 0, the ROI edge is completely transparent.

Transparency of the ROI faces, specified as a number in the range [0, 1]. When the value is 1, the ROI faces are completely opaque. When the value is 0, the ROI faces are completely transparent.

Transparency of ROI face directly underneath the mouse pointer, specified as a number in the range [0, 1] or 'none', to indicate no change to face transparency. When set to 1, the face under the mouse pointer is completely opaque. When set to 0, the face is completely transparent.

Color of the ROI face directly underneath the mouse pointer, specified as an RGB triplet, a color name, a short color name, or 'none'. If you specify 'none', then the face color does not when the mouse hovers over the face. When you are not hovering over a face of the ROI, the value of the ROI Color property determines the face color.

You can specify any color using an RGB triplet. An RGB triplet is a 3-element row vector whose elements specify the intensities of the red, green, and blue components of the color. The intensities must be in the range [0,1].

You can specify some common colors by name as a string scalar or character vector. This table lists the named color options and the equivalent RGB triplets.

Color NameShort NameRGB TripletAppearance
'red''r'[1 0 0]

A rectangle colored pure red

'green''g'[0 1 0]

A rectangle colored pure green

'blue''b'[0 0 1]

A rectangle colored pure blue

'cyan' 'c'[0 1 1]

A rectangle colored pure cyan

'magenta''m'[1 0 1]

A rectangle colored pure magenta

'yellow''y'[1 1 0]

A rectangle colored pure yellow

'black''k'[0 0 0]

A rectangle colored black

'white''w'[1 1 1]

A rectangle colored white

Here are the RGB triplets for the default colors that MATLAB uses in many types of plots.

RGB TripletAppearance
[0 0.4470 0.7410]

A rectangle colored medium blue

[0.8500 0.3250 0.0980]

A rectangle colored reddish-orange

[0.9290 0.6940 0.1250]

A rectangle colored dark yellow

[0.4940 0.1840 0.5560]

A rectangle colored dark purple

[0.4660 0.6740 0.1880]

A rectangle colored light green

[0.3010 0.7450 0.9330]

A rectangle colored light blue

[0.6350 0.0780 0.1840]

A rectangle colored dark red

Example: 'FaceColorOnHover','r'

Example: 'FaceColorOnHover','green'

Example: 'FaceColorOnHover',[0 0.4470 0.7410]

Visibility of the ROI handle in the Children property of the parent, specified as one of the values in this table.

ValueDescription
'on'The object handle is always visible (default).
'off'The object handle is hidden at all times.
'callback' The object handle is visible from within callbacks or functions invoked by callbacks, but not from within functions invoked from the command line.

Interactivity of the ROI, specified as one of the values in this table.

ValueDescription
'all'The ROI is fully interactable.
'none'The ROI is not interactable, and no drag points are visible.
'translate'The ROI can be translated (moved) within the drawing area.

ROI label, specified as a character vector or string scalar. By default, the ROI has no label ('').

Transparency of the text background, specified as a number in the range [0, 1]. When set to 1, the text background is completely opaque. When set to 0, the text background is completely transparent.

Label text color, specified as an RGB triplet, a color name, or a short color name.

You can specify any color using an RGB triplet. An RGB triplet is a 3-element row vector whose elements specify the intensities of the red, green, and blue components of the color. The intensities must be in the range [0,1].

You can specify some common colors by name as a string scalar or character vector. This table lists the named color options and the equivalent RGB triplets.

Color NameShort NameRGB TripletAppearance
'red''r'[1 0 0]

A rectangle colored pure red

'green''g'[0 1 0]

A rectangle colored pure green

'blue''b'[0 0 1]

A rectangle colored pure blue

'cyan' 'c'[0 1 1]

A rectangle colored pure cyan

'magenta''m'[1 0 1]

A rectangle colored pure magenta

'yellow''y'[1 1 0]

A rectangle colored pure yellow

'black''k'[0 0 0]

A rectangle colored black

'white''w'[1 1 1]

A rectangle colored white

Here are the RGB triplets for the default colors that MATLAB uses in many types of plots.

RGB TripletAppearance
[0 0.4470 0.7410]

A rectangle colored medium blue

[0.8500 0.3250 0.0980]

A rectangle colored reddish-orange

[0.9290 0.6940 0.1250]

A rectangle colored dark yellow

[0.4940 0.1840 0.5560]

A rectangle colored dark purple

[0.4660 0.6740 0.1880]

A rectangle colored light green

[0.3010 0.7450 0.9330]

A rectangle colored light blue

[0.6350 0.0780 0.1840]

A rectangle colored dark red

Example: 'LabelTextColor','r'

Example: 'LabelTextColor','green'

Example: 'LabelTextColor',[0 0.4470 0.7410]

Label visibility, specified as one of these values.

ValueDescription
'on'Label is visible when the ROI is visible.
'hover'Label is visible only when the mouse is hovering over the ROI.
'off'Label is not visible.

Width of the ROI edge, specified as a positive number in points.

ROI parent, specified as an Axes or UIAxes object. For information about using an ROI in a UIAxes, including important limitations, see Using ROIs in Apps Created with App Designer.

Position of the cuboid, specified as a 1-by-6 numeric vector of the form [xmin, ymin, zmin, width, height, depth]. This property updates automatically when you draw or move the cuboid.

Ability of the cuboid to be rotated, specified as one of these values.

ValueDescription
'all'ROI is fully rotatable.
'x'ROI can only be rotated about the x axis.
'y'ROI can only be rotated about the y axis.
'z'ROI can only be rotated about the z axis.
'none'ROI is not rotatable.

Angle of ROI rotation, specified as a 1-by-3 numeric vector of rotation angles, measured in degrees. The rotation angles array is of the form [x_angle y_angle z_angle], measured about the x-, y-, and z-axis, respectively. Rotation is applied about the ROI centroid in order z, then y, then x.

The value of RotationAngle does not impact the values in the Position property. Position represents the cuboid prior to any rotation. When you rotate the cuboid, use the Vertices property to determine the location of the rotated cuboid.

Ability of the scroll wheel to adjust the size of the cuboid during interactive placement, specified as one of these values.

ValueDescription
'allresize'Scroll wheel impacts all ROI dimensions.
'xresize' Scroll wheel impacts only the x dimension.
'yresize' Scroll wheel impacts only the y dimension.
'zresize' Scroll wheel impacts only the z dimension.
'none'Scroll wheel has no effect.

Selection state of the ROI, specified as the logical value true or false. You can also set this property interactively. For example, clicking on the ROI selects the ROI and sets this property to true. Similarly, pressing the Ctrl key and clicking the ROI deselects the ROI and sets the value of this property to false.

Color of the ROI when selected, specified as an RGB triplet, a color name, a short color name, or 'none'. If you specify 'none', then the value of Color defines the color of the ROI for all states, selected or not.

You can specify any color using an RGB triplet. An RGB triplet is a 3-element row vector whose elements specify the intensities of the red, green, and blue components of the color. The intensities must be in the range [0,1].

You can specify some common colors by name as a string scalar or character vector. This table lists the named color options and the equivalent RGB triplets.

Color NameShort NameRGB TripletAppearance
'red''r'[1 0 0]

A rectangle colored pure red

'green''g'[0 1 0]

A rectangle colored pure green

'blue''b'[0 0 1]

A rectangle colored pure blue

'cyan' 'c'[0 1 1]

A rectangle colored pure cyan

'magenta''m'[1 0 1]

A rectangle colored pure magenta

'yellow''y'[1 1 0]

A rectangle colored pure yellow

'black''k'[0 0 0]

A rectangle colored black

'white''w'[1 1 1]

A rectangle colored white

Here are the RGB triplets for the default colors that MATLAB uses in many types of plots.

RGB TripletAppearance
[0 0.4470 0.7410]

A rectangle colored medium blue

[0.8500 0.3250 0.0980]

A rectangle colored reddish-orange

[0.9290 0.6940 0.1250]

A rectangle colored dark yellow

[0.4940 0.1840 0.5560]

A rectangle colored dark purple

[0.4660 0.6740 0.1880]

A rectangle colored light green

[0.3010 0.7450 0.9330]

A rectangle colored light blue

[0.6350 0.0780 0.1840]

A rectangle colored dark red

Example: 'SelectedColor','r'

Example: 'SelectedColor','green'

Example: 'SelectedColor',[0 0.4470 0.7410]

Color of the ROI stripe, specified as an RGB triplet, a color name, a short color name, or 'none'. If you specify 'none', then the ROI edge is a solid color specified by Color. Otherwise, the edge of the ROI is striped, with colors alternating between the colors specified by Color and StripeColor.

You can specify any color using an RGB triplet. An RGB triplet is a 3-element row vector whose elements specify the intensities of the red, green, and blue components of the color. The intensities must be in the range [0,1].

You can specify some common colors by name as a string scalar or character vector. This table lists the named color options and the equivalent RGB triplets.

Color NameShort NameRGB TripletAppearance
'red''r'[1 0 0]

A rectangle colored pure red

'green''g'[0 1 0]

A rectangle colored pure green

'blue''b'[0 0 1]

A rectangle colored pure blue

'cyan' 'c'[0 1 1]

A rectangle colored pure cyan

'magenta''m'[1 0 1]

A rectangle colored pure magenta

'yellow''y'[1 1 0]

A rectangle colored pure yellow

'black''k'[0 0 0]

A rectangle colored black

'white''w'[1 1 1]

A rectangle colored white

Here are the RGB triplets for the default colors that MATLAB uses in many types of plots.

RGB TripletAppearance
[0 0.4470 0.7410]

A rectangle colored medium blue

[0.8500 0.3250 0.0980]

A rectangle colored reddish-orange

[0.9290 0.6940 0.1250]

A rectangle colored dark yellow

[0.4940 0.1840 0.5560]

A rectangle colored dark purple

[0.4660 0.6740 0.1880]

A rectangle colored light green

[0.3010 0.7450 0.9330]

A rectangle colored light blue

[0.6350 0.0780 0.1840]

A rectangle colored dark red

Example: 'StripeColor','r'

Example: 'StripeColor','green'

Example: 'StripeColor',[0 0.4470 0.7410]

Tag to associate with the ROI, specified as a character vector or string scalar. Use the tag value to find the ROI object in a hierarchy of objects using the findobj function.

Data to associate with the ROI, specified as any MATLAB data. For example, you can specify a scalar, vector, matrix, cell array, string, character array, table, or structure. The Cuboid object does not use this data.

This property is read-only.

Locations of the corners of the cuboid, returned as an 8-by-3 numeric matrix.

ROI visibility, specified as 'on' or 'off', or as a numeric or logical 1 (true) or 0 (false). A value of 'on' is equivalent to true, and 'off' is equivalent to false. The value is stored as an on/off logical value of type OnOffSwitchState.

ValueDescription
'on'Display the ROI.
'off'Hide the ROI without deleting it. You still can access the properties of an invisible ROI.

Object Functions

addlistenerCreate event listener bound to event source
beginDrawingFromPointBegin drawing ROI from specified point
bringToFrontBring ROI to front of Axes stacking order
drawBegin drawing ROI interactively
inROIQuery if points are located in ROI
waitBlock MATLAB command line until ROI operation is finished

Examples

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Define vectors for 3-D scatter data.

[x,y,z] = sphere(16);
X = [x(:)*.5 x(:)*.75 x(:)];
Y = [y(:)*.5 y(:)*.75 y(:)];
Z = [z(:)*.5 z(:)*.75 z(:)];

Specify the size and color of each marker.

S = repmat([1 .75 .5]*10,numel(x),1);
C = repmat([1 2 3],numel(x),1);

Create a 3-D scatter plot and use view to the change the angle of the axes in the figure.

figure
hScatter = scatter3(X(:),Y(:),Z(:),S(:),C(:),'filled'); 
view(-60,60);

Begin placing a cuboid in the axes that snaps to the nearest point from the scatter plot. Adjust the size of the cuboid during interactive placement by using the scroll wheel.

ax = gca;
h = images.roi.Cuboid(ax);
draw(h)

Define vectors for 3-D scattered data.

[x,y,z] = sphere(16);
X = [x(:)*.5 x(:)*.75 x(:)];
Y = [y(:)*.5 y(:)*.75 y(:)];
Z = [z(:)*.5 z(:)*.75 z(:)];

Specify the size and color of each marker.

S = repmat([1 .75 .5]*10,numel(x),1);
C = repmat([1 2 3],numel(x),1);

Create a 3-D scatter plot and use view to change the angle of the axes in the figure.

figure
hScatter = scatter3(X(:),Y(:),Z(:),S(:),C(:),'filled'); 
view(-60,60);

Create a Cuboid ROI object, specifying the color. Call the draw object function to enable interactive drawing of the cuboid shape.

roi = images.roi.Cuboid(gca,'Color','r');
draw(roi)

Set up listeners for ROI moving events. When you move it, the ROI sends notifications of these events and executes the callback function you specify.

addlistener(roi,'MovingROI',@allevents);
addlistener(roi,'ROIMoved',@allevents);

The allevents callback function displays the previous position and the current position of the ROI.

function allevents(src,evt)
    evname = evt.EventName;
    switch(evname)
        case{'MovingROI'}
            disp(['ROI moving previous position: ' mat2str(evt.PreviousPosition)]);
            disp(['ROI moving current position: ' mat2str(evt.CurrentPosition)]);
        case{'ROIMoved'}
            disp(['ROI moved previous position: ' mat2str(evt.PreviousPosition)]);
            disp(['ROI moved current position: ' mat2str(evt.CurrentPosition)]);
    end
end

More About

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Tips

  • To draw the ROI interactively using the draw or drawcuboid function, position the cursor on the ROI and click and drag to move or change the size of the shape. To finish the ROI, release the mouse button.

  • The ROI supports the following interactivity, including keyboard shortcuts.

    BehaviorKeyboard shortcut
    Cancel drawing the ROI.Press Esc. The function returns a valid ROI object with an empty Position property.
    Fine-tune size of ROI as you are drawing.As you draw the ROI, use the scroll wheel to make small changes to its size.
    Resize (reshape) the ROI.

    Position the pointer over a surface of the ROI that is visible from your point of view and then click and drag.

    Move the ROI.Position the pointer over a surface of the ROI that is visible from your point of view. Press Shift as you click and drag to move the ROI.
    Delete the ROI.Position the pointer over the ROI, right-click, and select Delete Cuboid from the context menu. You can also delete the ROI programmatically using the delete function.
  • For information about using an ROI in an app created with App Designer, see Using ROIs in Apps Created with App Designer.

Compatibility Considerations

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Not recommended starting in R2020a

Introduced in R2019a