Problem converting JPEG string to IMAQ image

[shadowzero2]

Hi, I'm using the JPEG decode VI to decode an image string i'm receiving from a Blackfin Camera. This works fine when i run VI itself but when i use it as a sub-vi the program crashes .Anybody have any advice??

This is an image of my program

this is how the file is returned from the camera 

'I'

'##IMJxs0s1s2s3....'

grab JPEG compressed video frame x = frame size in pixels: 1 = 80x64, 3 = 160x120, 5 = 320x240, 7 = 640x480, 9 = 1280x1024 s0s1s2s3=frame size in bytes (s0 * 256^0 + s1 * 256^1 + s2 * 256^2 + s3 * 256^3) .... = full JPEG frame Note that sometimes the 'I' command returns nothing if the robot camera is busy, so the 'I' command should be called as many times as needed until a frame is returned

I modified the JPEG decode VI by switching the red and blue colour planes. I dont know whether this caused the problem though.

[Andrey_Dmitriev · Accepted solution]

Hi,

This may be helpful for you:

http://forums.ni.com/ni/board/message?board.id=200&message.id=21845#M21845

Andrey.

[shadowzero2]

Hi, I finally got a chance to try out your code and it works perfectly thanks alot.

[BruceAmmons]

I posted an idea request for a function to convert strings back to images.  Please vote for it at:

http://forums.ni.com/t5/LabVIEW-Idea-Exchange/Add-function-to-convert-string-to-image/idi-p/1104573#...

Thanks,

Bruce