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fwrite_image (MathScript RT Module Function)

LabVIEW 2011 MathScript RT Module Help

Edition Date: June 2011

Part Number: 373123B-01

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Download Help (Windows Only)

Owning Class: support

Requires: MathScript RT Module


fwrite_image(data, fname, ftype)

Legacy Name: imwrite


Writes data to an image file. The image size cannot exceed 4 megapixels.




Name Description
data Specifies a matrix of real numbers that represent the image content.
fname Specifies the filename. fname is a string.
ftype Specifies the file type. ftype is a string that accepts the following values.

'BMP' BMP image
'JPEG' JPEG image
'PNG' PNG image


If you use this function in a stand-alone application or shared library and fname is a relative path, LabVIEW searches for the file in the path where you installed the application or shared library. If fname is an absolute path, LabVIEW searches for the file on the local machine or target at the specified location. (Real-Time Module) If you deploy this function to an RT target and fname is a relative path, LabVIEW searches for the file in the path returned by the Default Data Directory VI.

The following table lists the support characteristics of this function.

Supported in the LabVIEW Run-Time Engine Yes
Supported on RT targets Yes
Suitable for bounded execution times on RT No (affects entire script)


z = peakfcn2d(30);
fwrite_image(z, '/images/reference/en-XX/help/373123B-01/imagetest.bmp', 'BMP');
z1 = fread_image('/images/reference/en-XX/help/373123B-01/imagetest.bmp', 'BMP');

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