Perspective File Upload - tablet picture size

Ignition
1

Is there a way to request the camera to restrict the size of pictures taken? My project needs two small pictures that would be displayed or printed in a "thumbnail" size, approximately 200x200 pixels. A 6mb picture is way too big for this use. I thought about limiting the file size in the component, but I don't think that would force the camera to downsize the photo.

Thanks!

edit: For future people, this is what I ended up with in the onFileReceived event to solve my issue. Forgive my dirty code.

def runAction(self, event):
	from io import BytesIO
	from java.io import ByteArrayInputStream
	from java.io import ByteArrayOutputStream
	from javax.imageio import ImageIO
	from java.awt import Image
	from java.awt.image import BufferedImage
	
	pic_data = event.file.getBytes()
	stream = ByteArrayInputStream(pic_data)
	original_image = ImageIO.read(stream)
	
#	set target size and preserve aspect ratio
	target_width = 640
	original_width = original_image.getWidth(None)
	original_height = original_image.getHeight(None)
	ratio = float(original_height) / float(original_width)
	target_height = int(target_width * ratio)

#	rescale
	scaled = original_image.getScaledInstance(target_width, target_height, Image.SCALE_SMOOTH)
	
#	buffer image for writing
	buffered = BufferedImage(target_width, target_height, BufferedImage.TYPE_INT_RGB)
	g = buffered.createGraphics()
	g.drawImage(scaled, 0, 0, None)
	g.dispose()
	
#	encode to JPEG
	out = ByteArrayOutputStream()
	ImageIO.write(buffered, 'jpg', out)
	out.flush()
	rescaled_data = out.toByteArray()
	out.close()

this takes a 7mb image from an ipad and shrinks the file size to 27k

2

No, but you could use java's ImageIO to decipher the file and then rescale it on the gateway before you store it.

1 Like
3

Thank you!

I updated my original post with the code I used to accomplish this. There's probably a cleaner way to do it. Thanks again for pointing me in the right direction.

4

Yes, your code should be a function in a project library script, so you can do your imports outside the function, along with constants like target_width. The actual runAction event script should be a one-liner delegating to the project library function.