How to save LabVIEW waveform chart as a picture

(1) On the block diagram, right-click the terminal of the control for which you want to generate an image and select Create Call Node to Get Image from the shortcut menu to create a call node.

(2) Right-click the Image Depth input and select Create Constant from the shortcut menu.

Enter 1, 4, 8, or 24 in the numeric constant and press the key to set the color depth of the image.

in:

Value - 1 - 1 bit, black and white image

Value - 4 - 4 bits, 16-color image

Value - 8 - 8-bit, 256-color image

Value - 24 - 24 bits, true color image

(3) You can specify the background color of the image by wiring a color box constant or a numeric color value to the Background Color input.

(4) Select one of the following VIs and add it to the block diagram.

Added the Write to JPEG File VI to save images in JPEG format. 

Added the Write to PNG File VI to save images in PNG format.

Add the Write to BMP File VI to save the image in BMP format. 

(5) Connect the image data output of the calling node to the image data input of the graphics format VI.

(6) Right-click the Format File Path input of the Graphics Format VI and select Create Input Control from the shortcut menu, where Format is the graphics format of the image.

(7) In the Format File Path input control of the front panel window, enter the path where the file is stored and the image file name.

Finally, run the VI and save the image to the specified directory.

Example: The following block diagram saves a waveform chart as a PNG image.