CurrentImage

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`CurrentImage`

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returns the current image captured from a connected camera.

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CurrentImage[n]

returns n sequential image frames as a list.

Details and Options

Dynamic[CurrentImage[]] continuously captures a stream of images.
The following options can be given:

	ImagePreviewFunction	Identity	function applied to the image when displayed
	ImageSize	Automatic	display size
	ImagingDevice	$ImagingDevice	the imaging device to use
	RasterSize	Automatic	dimensions of the captured image

CurrentImage uses the camera specified by $ImagingDevice. The value of $ImagingDevice can be reset to any device in the list $ImagingDevices.
Cameras may require some time to adjust exposure after startup. During this time, images returned by CurrentImage may be either overexposed or underexposed.

Examples

open allclose all

Basic Examples (2)Summary of the most common use cases

Capture an image with the built-in camera:

In[1]:=1

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https://wolfram.com/xid/0d6fasrsn2-mxvcx

Out[1]=1

Detect and highlight faces:

In[1]:=1

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https://wolfram.com/xid/0d6fasrsn2-tuc2ss

Out[1]=1

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https://wolfram.com/xid/0d6fasrsn2-5wjaqs

Dynamic capturing:

In[1]:=1

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https://wolfram.com/xid/0d6fasrsn2-gstkfp

Out[1]=1

Scope (2)Survey of the scope of standard use cases

Capture multiple frames at a time:

In[1]:=1

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https://wolfram.com/xid/0d6fasrsn2-2zs6fg

Out[1]=1

Dynamic capturing and processing:

In[1]:=1

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https://wolfram.com/xid/0d6fasrsn2-tssksh

Out[1]=1

Options (3)Common values & functionality for each option

ImagePreviewFunction (1)

By default, the original captured image is displayed in the capture user interface:

In[1]:=1

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https://wolfram.com/xid/0d6fasrsn2-4yfqeq

Out[1]=1

Apply a function to the images before displaying:

In[2]:=2

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https://wolfram.com/xid/0d6fasrsn2-s8zf99

Out[2]=2

Notice the values stored in the buffer are still the original captured frames:

In[3]:=3

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https://wolfram.com/xid/0d6fasrsn2-mi3f17

Out[3]=3

ImageSize (1)

Set the displayed size:

In[12]:=12

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https://wolfram.com/xid/0d6fasrsn2-qwyc1u

Out[12]=12

In[2]:=2

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https://wolfram.com/xid/0d6fasrsn2-m1h7c9

Out[2]=2

RasterSize (1)

Set the resolution of the image returned:

In[12]:=12

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https://wolfram.com/xid/0d6fasrsn2-gjlddf

Out[12]=12

Applications (3)Sample problems that can be solved with this function

Time-lapse recording of image frames:

In[1]:=1

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https://wolfram.com/xid/0d6fasrsn2-irvqt0

Out[96]=96

Create an animation from a series of captured images:

In[1]:=1

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https://wolfram.com/xid/0d6fasrsn2-dvcty

Out[1]=1

A simple dynamic motion detector:

In[1]:=1

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https://wolfram.com/xid/0d6fasrsn2-bccwhc

Out[1]=1

Properties & Relations (1)Properties of the function, and connections to other functions

Open a device using DeviceOpen:

In[1]:=1

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https://wolfram.com/xid/0d6fasrsn2-qxml8x

Out[1]=1

In[7]:=7

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https://wolfram.com/xid/0d6fasrsn2-bis5vr

Out[7]=7

Use DeviceClose to close the imaging device:

In[8]:=8

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https://wolfram.com/xid/0d6fasrsn2-rg3yr4

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