MATLAB: How to increase the resolution of the TIFF-preview of an EPS file in MATLAB

epsexportfilesMATLABpreviewprintqualityresolutiontifftiff-preview

The current TIFF-preview quality is set at 72 dpi in MATLAB 6.5 (R13). There is a need for higher quality TIFF-preview, because some products, such as Microsoft PowerPoint, can only show the preview.

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Although the TIFF preview has a resolution of 72 dpi, note that the resolution of the printed document wil be as specified though your PRINT command (or default to 150 dpi). For example, the following line of code will print your figure to an EPS file with resolution 300 dpi with a TIFF preview of 72 dpi:

peaks
print -depsc -r300 -tiff peaks.eps

Note that in MATLAB 7.0 (R14), the default TIFF preview resolution becomes 150 dpi.

Also, note that Microsoft Office 2002 no longer needs a TIFF preview to display the EPS image in the unprinted document.

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MATLAB: Does MATLAB have any image acquisition functionality

The Image Acquisition Toolbox extends the MATLAB technical computing environment to include functions for acquiring video and images from PC-compatible frame-grabber cards and video devices. The toolbox lets you connect to and configure your hardware, preview your video, and stream images directly into MATLAB for analysis and visualization.

Together, MATLAB and the Image Acquisition Toolbox provide direct access to hardware video devices, as well as advanced and proven analysis routines for your scientific imaging applications

For more information on the Image Acquisition Toolbox, please see the following URL:

https://www.mathworks.com/products/image-acquisition.html

MATLAB: How to change the resolution of images I acquire with the Image Acquisition Toolbox

The resolution of images acquired from a camera using the Image Acquisition Toolbox is not directly set by MATLAB. Instead, it is dependent upon the video format of the hardware device. Each video format has a specific resolution associated with it. Once a video format is chosen, the associated resolution is used.

As an example, if you have a 'winvideo' compatible imaging device connected to your system, the following command returns more information about the available image acquisition hardware:

info = imaqhwinfo('winvideo')

In order to see a list of supported video formats for this device, type:

info.DeviceInfo.SupportedFormats

This results in an output similar to the one shown below:

 ans = 
     'RGB24_160x120'    'RGB24_176x144'     'RGB24_320x240'    'RGB24_352x288'    'RGB24_640x480'

Select a video format and associate it with a video object when creating the object in the MATLAB workspace. For example:

obj = videoinput('winvideo',1, 'RGB24_640x480')

Sets the video format of the camera to acquire RGB images at a resolution of 640X480. The video object's 'VideoResolution' property specifies the resolution of acquired images. This property, however, is read-only and can not be directly set.

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MATLAB: Does MATLAB have any image acquisition functionality

MATLAB: How to change the resolution of images I acquire with the Image Acquisition Toolbox

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