Forward recognition camera as dashcam?

Discussion in 'Gen 4 Prius Technical Discussion' started by Elektroingenieur, Jan 8, 2017.

  1. Elektroingenieur

    Elektroingenieur Senior Member

    Joined:
    Jan 8, 2017
    1,559
    2,111
    9
    Location:
    California
    Vehicle:
    2016 Prius
    Model:
    Three Touring
    Has anyone found a way to extract a usable video signal from the Forward Recognition Camera, the windshield-mounted camera found on vehicles with Toyota Safety Sense-P?

    The camera occupies the ideal spot for a dashcam, but I have no idea if would be suitable for this purpose. In particular, I’d be interested to know the camera’s resolution and frame rate, and whether it is monochrome or color; the published information from Toyota describes the camera only as “CMOS,” with no other details.

    The Repair Manual and Electrical Wiring Diagram disclose only heater, power, ground, and CAN bus connections on the connector (O7) for the camera ECU:

    O7-1 (HTR)
    O7-7 (IGB)
    O7-10 (GND)
    O7-5 (CA1P)
    O7-11 (CA1N)
    O7-6 (CANH)
    O7-12 (CANL)​

    Considering the limited bitrates for CAN and the system description in the Repair Manual, it seems clear that the machine vision algorithms are run inside the camera ECU, with only the results, not full-motion video, being sent across the CAN bus.

    It is tantalizing to have a twelve-position connector with five unknown pins, though—but not quite enough to spend $800 on a spare camera to investigate on the bench.
     
  2. RCO

    RCO Senior Member

    Joined:
    Aug 31, 2016
    3,708
    5,155
    0
    Location:
    Cornwall
    Vehicle:
    Other Hybrid
    Model:
    N/A
    I read somewhere on here last year that the video would not be high enough definition to pick out number plates, etc.
     
  3. Kablooie

    Kablooie Member

    Joined:
    Feb 21, 2004
    273
    11
    0
    Location:
    La Canada
    Vehicle:
    2016 Prius
    Model:
    Three
    Here is a little more technical info on the camera.
    It's not enough to figure this out but it looks like it might have a fairly decent image.
    An additional module can be added to recognize street signs but since it's developed in Germany it looks like it may only work with European signs.

    Continental Industrial Sensors -MFC 2 Multi Function Camera
     
  4. Elektroingenieur

    Elektroingenieur Senior Member

    Joined:
    Jan 8, 2017
    1,559
    2,111
    9
    Location:
    California
    Vehicle:
    2016 Prius
    Model:
    Three Touring
    Thanks for the link to the information about Continental’s camera system. I’m not sure that is the one, however—the 2016 Prius liftback with TSS-P, at least, seems to use a camera ECU made by DENSO.

    For my car, the parts catalog says the Forward Recognition Camera is Toyota part number 8646C-47010. I found a junkyard selling one, and in their photos, the part is marked with that number, “DENSO,” “036500-7372,” and “MADE IN JAPAN.” They also wanted $700 for it, which is still too much to spend just for a component teardown.

    You are correct about European signs: in Europe, the Prius has a Road Sign Assist feature, which the owner’s manual describes as being able to detect speed limit and no overtaking signs. Considering the diversity of American traffic signs, even for speed limits, I’m not surprised this feature is omitted from the U.S. vehicles.
     
    pilotgrrl and RCO like this.
  5. Elektroingenieur

    Elektroingenieur Senior Member

    Joined:
    Jan 8, 2017
    1,559
    2,111
    9
    Location:
    California
    Vehicle:
    2016 Prius
    Model:
    Three Touring
    I found a press release announcing that DENSO would be using a Toshiba image recognition processor in an active safety system for vehicles on the market in Fall 2015.

    Toshiba’s overview datasheet and catalog page says more about the TMPV7506XBG processor and its applications; the Video Input Interface section of the datasheet includes this information:
    I have no idea, however, if this is the chip used in the Prius.
     
    RCO likes this.
  6. JamesBurke

    JamesBurke Senior Member

    Joined:
    May 19, 2009
    1,217
    488
    27
    Location:
    Morgantown, WV
    Vehicle:
    Other Non-Hybrid
    Model:
    N/A
Loading...
Similar Threads - Forward recognition camera
  1. pakitt
    Replies:
    5
    Views:
    2,205