LinkSprite JPEG Color Camera

bergamotov

in Integration and Hardware • 2 years ago

Hello

I have LinkSprite JPEG Color Camera , it is capable of direct connection to computer serial port.
It's transmitting JPG picture by chunks and using Serial library I can get data from camera in to Processing.
But I have no idea how to load those bytes (already compressed jpg picture) I'm receiving over serial link into picture and display it.
I'm reading the site and trying examples, but so far it's just too much information for me.
If you could just give me some tips ... This should be related somehow to loadPixels() or pixels[], but how to transform sequently read bytes into picture ... ?

Regards

Janis

Replies(8)

Psysoul

Re: LinkSprite JPEG Color Camera

2 years ago

This is some documentation for the camera:

http://www.sparkfun.com/datasheets/Sensors/Imaging/1274419957.pdf

So you need to read bytes from it and JPEG is from FFD8 to FFD9..you need to read all bytes between that and maybe save that as a jpeg.

So try this first: http://processing.org/reference/loadBytes_.html

1, Loadbytes (get data between start/end flag FFD8/D9)

2, save image http://processing.org/reference/saveBytes_.html

then later you can do some other things (maybe show the picture on the fly etc..)..

bergamotov

Re: LinkSprite JPEG Color Camera

2 years ago

Psysoul, thank you for quick reply

Did I understood you correctly that you are proposing to
- load bytes for camera into the array
- saving array to file
- loading resulting file as image
- manipulating loaded image in processing

The best solution I'm looking for is loadImage(jpegBytes[]) instead of loadImage("file.jpg").
Is it possible?

I'm thinking about loadPixels() from camera directly into pixels[] array of PImage object.
The only problem I see is that I'm not getting stream of pixels from camera, but already compressed jpeg data.

PhiLho

Re: LinkSprite JPEG Color Camera

2 years ago

No, he was telling to get the Jpeg bytes and to save them as is in a temporary file. Then you can do loadImage() from this temp file.

bergamotov

Re: Re: LinkSprite JPEG Color Camera

2 years ago

This is not very efficient ... :(

marionb

Re: LinkSprite JPEG Color Camera

2 years ago

Hello,

I've bought the same LinkSprite JPEG Color Camera and I've downloaded softwares LS Y201 and XCTU.

I plugged the camera directly to a DB9 connector connected to the computer. The camera is supplied with +5 V.
No image appears out of the camera. I am not sure of the configuration software toretrieve the image.
So is it possible to directly connect the camera to the computer? How did you do?

Thank you very much for your answer

oriana_o

LinkSprite JPEG Color Camera

2 years ago

Hi Janis,
I have a JPEG LinkSprite Color Camera and I've been reading your questions in theforum, I at this moment I have the same question, as I can interpret the bytes that returns the camera to read and display JPEG image. That programming software used to read the data?. I use Labview or Matlab, I hope I can help. Thanks

Oriana

bergamotov

Re: LinkSprite JPEG Color Camera

2 years ago

Hello Marionb

Basically I took advice of Psysoul, very inefficient one, but working well.

I have connected camera to my mac via FTDI board
In Processing using serial library I'm commanding camera to send JPG picture
I'm receiving each byte andputting it into byte array
I'm saving this array to local disk file
I'm loading this disk file with jpg picture into processing
I'm processing it in the Processing

Oriana
What I'd like to build is library to parse JPG file directly in processing according to JPG specification

oriana_o

LinkSprite JPEG Color Camera

2 years ago

Hi Janis,
I wonder if you know where I can get documentation for how to encode the data to sendme the camera and then display them as JPEG image

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