Is there a way to convert a png file to jpg?

Ignition
1

Has anyone been able to convert a png file to a jpg file in a gateway script?
I'll update my post if I find something in the meantime. So far no luck.

Thanks in advance.

2

This Java code will do it:

BufferedImage img = ImageIO.read(new File("lenna.png"));
ImageIO.write(img, "jpg", new File("lenna.jpg"));

Can you manage the conversion to Jython yourself?

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3

It's generally not useful. PNG is a lossless file format. JPG is lossy and will have artifacts. The only reason I can think of to do this is for low-resolution / accuracy archiving of images to save disk space.

4

@Kevin.Herron already beat me to it, but here's the Jython version of it.

from javax.imageio import ImageIO
from java.io import File

img = ImageIO.read(File(path.format("lenna.png")))
ImageIO.write(img, 'jpg', File(path.format("lenna.jpg")))
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5

Thank you @Kevin.Herron and @JordanCClark unfortunatelyI can only pick one solution. But both helped a ton.

Exactly what I needed. Here is my end snippet

from javax.imageio import ImageIO
from java.io import File

img = ImageIO.read(File('C:\images\image.png'))
ImageIO.write(img, 'jpg', File('C:\images\image.jpg'))

@Transistor - While I agree with you. The file I get from my frame grabber only gives a PNG file. Using I'm using Sherlock to perform an inspection on the file to verify orientation of a reverse camera, it only accepts jpeg files.

You guys saved me a giant headache. Thanks!!

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