viewer2d
Description
creates a
viewer
= viewer2dViewer
object in a new figure window that is configured for 2-D image
display. Use viewer
to query and modify properties of the
Viewer
object after you create the object. For a list of properties, see
Viewer Properties.
creates a viewer
= viewer2d(___,Name=Value
)Viewer
object and sets properties of the object using one or more
name-value arguments in addition to any of the input arguments from previous
syntaxes.
For example, viewer2d(BackgroundColor="green")
creates a
Viewer
object in a new web figure with a green background.
Examples
Create 2-D Viewer for Image Display
Create a viewer configured for 2-D image display. The viewer2d
function creates a new Viewer
object with default property values suitable for 2-D images.
viewer = viewer2d
viewer = Viewer with properties: Parent: [1×1 Figure] Position: [1 1 560 420] Children: [0×0 GraphicsPlaceholder] BackgroundColor: [0.9608 0.9608 0.9608] BackgroundGradient: off GradientColor: [0.0667 0.4431 0.7451] OrientationAxes: off ClippingPlanes: [0×4 single] Lighting: on LightPosition: [0 0 0] CameraPosition: [1 1 1] CameraTarget: [0 0 0] CameraUpVector: [0 0 1] CameraZoom: 1 Show all properties
Add an image to the viewer using the imageshow
function with the Parent
name-value argument specified as the handle to the Viewer
object.
im = imageshow("peppers.png",Parent=viewer);
Optionally, hide the scale bar.
viewer.ScaleBar = "off";
Display 2-D Images in UI Grid Layout
Create a grid layout with one row and two columns. The layout opens in a new figure outside of the Live Editor.
h = uifigure(Position=[100 100 1000 420]); g = uigridlayout(h,ColumnWidth={'1x','1x'},RowHeight={'fit','1x'});
Create two viewers to display 2-D images.
viewerLeft = viewer2d(g); viewerRight = viewer2d(g);
Specify the title for each grid element.
labelLeft = uilabel(g,Text="Spread Out",HorizontalAlignment="center"); labelRight = uilabel(g,Text="Close Together",HorizontalAlignment="center");
Specify the layout options for the grid. Nest the left viewer and its label in the first column. Nest the right viewer and its label in the second column.
labelLeft.Layout.Row = 1; labelLeft.Layout.Column = 1; labelRight.Layout.Row = 1; labelRight.Layout.Column = 2; viewerLeft.Layout.Row = 2; viewerLeft.Layout.Column = 1; viewerRight.Layout.Row = 2; viewerRight.Layout.Column = 2;
Display two images of hands side-by-side in the UI grid layout.
imageshow("hands1.jpg",Parent=viewerLeft); imageshow("hands2.jpg",Parent=viewerRight);
This image shows how the grid layout appears in the figure window, which is displayed outside of the Live Editor.
Input Arguments
parent
— Parent of viewer
Figure
object (default) | Panel
object | GridLayout
object | Tab
object
Parent of the viewer, specified as a Figure
object created using
the uifigure
function, or a
Panel
, GridLayout
, or Tab
object
whose parent is a figure created using the uifigure
function. You
can use the uipanel
, uigridlayout
, and uitab
functions to create the corresponding objects.
Tip
If you want to build an app in App Designer, or you want to add and position other
UI components in a figure with the 2-D viewer, the recommended parent is a
GridLayout
object.
When the parent is a GridLayout
object, you can adjust the layout
of the 2-D viewer using the Layout
property.
Example: parent = uifigure; viewer = viewer2d(parent);
creates a
parent figure using the uifigure
function.
Example: f = uifigure; parent = uipanel(f); viewer =
viewer2d(parent);
creates a parent Panel
object whose
parent is a figure created using the uifigure
function.
Name-Value Arguments
Specify optional pairs of arguments as
Name1=Value1,...,NameN=ValueN
, where Name
is
the argument name and Value
is the corresponding value.
Name-value arguments must appear after other arguments, but the order of the
pairs does not matter.
Example: viewer2d(BackgroundColor="green",BackgroundGradient=false)
creates a Viewer
object in a new figure with a green background and no
background gradient.
Note
The properties listed here are only a subset. For a full list, see Viewer Properties.
BackgroundColor
— Color of background
RGB triplet | hexadecimal color code | color name | short color name
Color of the background, specified as an RGB triplet, a hexadecimal color code, a
color name, or a short color name. When you select light mode in MATLAB®, the default color is [0.9608 0.9608 0.9608]
. When
you select dark mode in MATLAB, the default color is [0.1 0.1 0.1]
.
For a custom color, specify an RGB triplet or a hexadecimal color code.
An RGB triplet is a three-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]
, for example,[0.4 0.6 0.7]
.A hexadecimal color code is a string scalar or character vector that starts with a hash symbol (
#
) followed by three or six hexadecimal digits, which can range from0
toF
. The values are not case sensitive. Therefore, the color codes"#FF8800"
,"#ff8800"
,"#F80"
, and"#f80"
are equivalent.
Alternatively, you can specify some common colors by name. This table lists the named color options, the equivalent RGB triplets, and hexadecimal color codes.
Color Name | Short Name | RGB Triplet | Hexadecimal Color Code | Appearance |
---|---|---|---|---|
"red" | "r" | [1 0 0] | "#FF0000" | |
"green" | "g" | [0 1 0] | "#00FF00" | |
"blue" | "b" | [0 0 1] | "#0000FF" | |
"cyan"
| "c" | [0 1 1] | "#00FFFF" | |
"magenta" | "m" | [1 0 1] | "#FF00FF" | |
"yellow" | "y" | [1 1 0] | "#FFFF00" | |
"black" | "k" | [0 0 0] | "#000000" | |
"white" | "w" | [1 1 1] | "#FFFFFF" | |
"none" | Not applicable | Not applicable | Not applicable | No color |
Here are the RGB triplets and hexadecimal color codes for the default colors MATLAB uses in many types of plots.
RGB Triplet | Hexadecimal Color Code | Appearance |
---|---|---|
[0 0.4470 0.7410] | "#0072BD" | |
[0.8500 0.3250 0.0980] | "#D95319" | |
[0.9290 0.6940 0.1250] | "#EDB120" | |
[0.4940 0.1840 0.5560] | "#7E2F8E" | |
[0.4660 0.6740 0.1880] | "#77AC30" | |
[0.3010 0.7450 0.9330] | "#4DBEEE" | |
[0.6350 0.0780 0.1840] | "#A2142F" |
Example: BackgroundColor="r"
Example: BackgroundColor="green"
Example: BackgroundColor=[0 0.4470 0.7410]
Example: BackgroundColor="#FF8800"
SpatialUnits
— Spatial units for viewer
"pixels"
(default) | string scalar
Spatial units for the viewer, specified as a string scalar. Use this value to change the units label associated with viewer display tools, such as the scale bar and point and line annotations.
ScaleBar
— Display scale bar
"on"
(default) | on/off logical value
Display scale bar in the lower-right corner, 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
.
When this value is "on"
, the viewer displays a scale bar with
the zoom level of the image. The zoom level is based on a combination of available
screen size, the image size, and the viewer camera zoom level. A scale bar zoom level
of 100% indicates that one screen pixel displays one data pixel,
or one unit in world coordinates if you specify the Transformation
property.
Output Arguments
viewer
— 2-D viewer
Viewer
object
2-D viewer, returned as a Viewer
object configured for 2-D image
display. When you create a Viewer
by using the
viewer2d
function, the function sets certain properties to
support 2-D visualization. For details about which properties have different defaults
when created by viewer2d
instead of viewer3d
,
see Viewer Properties.
Tips
To clear all objects from the scene and delete all data containers previously added to the 2-D viewer
viewer
, use the command:clear(viewer)
To delete all objects in the scene and the 2-D viewer
viewer
, use the command:delete(viewer)
Version History
Introduced in R2024b
See Also
MATLAB 명령
다음 MATLAB 명령에 해당하는 링크를 클릭했습니다.
명령을 실행하려면 MATLAB 명령 창에 입력하십시오. 웹 브라우저는 MATLAB 명령을 지원하지 않습니다.
Select a Web Site
Choose a web site to get translated content where available and see local events and offers. Based on your location, we recommend that you select: .
You can also select a web site from the following list:
How to Get Best Site Performance
Select the China site (in Chinese or English) for best site performance. Other MathWorks country sites are not optimized for visits from your location.
Americas
- América Latina (Español)
- Canada (English)
- United States (English)
Europe
- Belgium (English)
- Denmark (English)
- Deutschland (Deutsch)
- España (Español)
- Finland (English)
- France (Français)
- Ireland (English)
- Italia (Italiano)
- Luxembourg (English)
- Netherlands (English)
- Norway (English)
- Österreich (Deutsch)
- Portugal (English)
- Sweden (English)
- Switzerland
- United Kingdom (English)