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imagemodel

Image model object

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Description

An image model object stores information about an image such as class, type, display range, width, height, minimum intensity value and maximum intensity value.

The image model object supports functions that you can use to access this information, get information about the pixels in an image, and perform special text formatting. Animagemodelobject works by querying the target imageCData.

Creation

Syntax

imgmodel = imagemodel(himage)

Description

example

imgmodel = imagemodel(himage)creates an image model object associated with a target imagehimage.

Ifhimageis an array of image objects, thenimgmodelis an array of image model objects.

Input Arguments

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Target image, specified as a handle or array of handles to image objects.

Object Functions

getClassType 得到的图像从图像del
getDisplayRange Get display range of image from image model
getImageHeight Get height of image from image model
getImageType Get type of image from image model
getImageWidth Get width of image from image model
getMaxIntensity Get maximum value of image from image model
getMinIntensity Get minimum value of image from image model
getNumberFormatFcn Get function handle that converts numeric value into character vector
getPixelInfoString Get pixel value as character vector
getPixelRegionFormatFcn Get function handle that formats pixel value into character vector
getPixelValue Get pixel value as numeric array
getDefaultPixelInfoString Get default pixel value as character vector
getDefaultPixelRegionString Get type of information displayed in Pixel Region tool as character vector
getScreenPixelRGBValue Get screen value of specified pixel in image model
getimagemodel Image model object from image object

Examples

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Open Live Script

Create an image model associated with a single image object.

h = imshow('peppers.png');

Figure contains an axes. The axes contains an object of type image.

im = imagemodel(h)
im = IMAGEMODEL object accessing an image with these properties: ClassType: 'uint8' DisplayRange: [] ImageHeight: 384 ImageType: 'truecolor' ImageWidth: 512 MinIntensity: [] MaxIntensity: []

Create an image model for an array of image object handles.

figure subplot(1,2,1) h1 = imshow('hestain.png'); subplot(1,2,2) h2 = imshow('coins.png');

Figure contains 2 axes. Axes 1 contains an object of type image. Axes 2 contains an object of type image.

im = imagemodel([h1 h2])
im = 1x2 array of IMAGEMODEL objects.
Open Live Script

Pixel values obtained from animagemodelobject can be returned in several formats suitable for display in different interactive image processing tools.

Create an image model associated with a color image.

h = imshow('flamingos.jpg');

Figure contains an axes. The axes contains an object of type image.

im = imagemodel(h)
im = IMAGEMODEL object accessing an image with these properties: ClassType: 'uint8' DisplayRange: [] ImageHeight: 972 ImageType: 'truecolor' ImageWidth: 1296 MinIntensity: [] MaxIntensity: []

Select a pixel by specifying row and column coordinates. This pixel has (row, column) coordinates (100, 200).

r = 100; c = 200;

Get the numeric value of the pixel using thegetPixelValuefunction.

pxValue = getPixelValue(im,r,c)
pxValue =1x3 uint8 row vector104 95 54

Get the default pixel information string using thegetDefaultPixelInfoStringfunction. This string depends on the type of image but does not use the pixel values. The pixel information string is suitable for use with the Pixel Information tool.

defaultPxInfoStr = getDefaultPixelInfoString(im)
defaultPxInfoStr = '[R G B]'

Using the same string format, get the pixel information string for the specified pixel by using thegetPixelInfoStringfunction.

pxInfoStr = getPixelInfoString(im,r,c)
pxInfoStr = '[104 95 54]'

Get the default pixel region string using thegetDefaultPixelRegionStringfunction. This string depends on the type of image but does not use the pixel values. The pixel region string is suitable for use with the Pixel Region tool.

defaultPxRegStr = getDefaultPixelRegionString(im)
defaultPxRegStr = 'R:000 G:000 B:000'

There are two steps to get the pixel region string for the specified pixel in the same string format. First, get a functionformatFcnthat formats numeric pixel values by using thegetPixelRegionFormatFcnfunction. Then, specify the row and column coordinate of the pixel as input arguments toformatFcnto get the formatted string.

formatFcn = getPixelRegionFormatFcn (im);pxRegStr = formatFcn(r,c)
pxRegStr =1x1 cell array{'R:104...'}

See Also

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Introduced before R2006a

Image Processing Toolbox Documentation

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Introducing Deep Learning with MATLAB

Introducing Deep Learning with MATLAB

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