On-vehicle camera device

• US 10,152,890 B2
• Filed: 01/12/2016
• Issued: 12/11/2018
• Est. Priority Date: 01/20/2015
• Status: Active Grant

• Current Assignee: Hitachi Astemo Ltd. (Hitachi, Ltd.)
• Original Assignee: Hitachi Automotive Systems Limited (Hitachi, Ltd.)
• Inventors: Mutou, Yoshiyuki, Kashimura, Rikiya
• Primary Examiner(s): Shudy, Angelina
• Application Number:
  US15/538,865
• Publication Number:
  US 20170345306A1
• Time in Patent Office: 1,064 Days
• Field of Search: 701301
• CPC Class Codes: G08G 1/16 Anti-collision systems road vehicle drive control systems for predicting or avoiding probable or impending collision otherwise than by control of a particular sub-unit B60W30/08
• CPC Class Codes: H04N 17/002 for television cameras
• CPC Class Codes: H04N 23/60 Control of cameras or camera modules
• CPC Class Codes: H04N 25/44 by partially reading an SSIS array
• CPC Class Codes: H04N 25/68 applied to defects
• CPC Class Codes: H04N 7/18 Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast

Abstract

Provided is an on-vehicle camera device that swiftly and accurately detects, in every frame, data line signals of respective bits from imaging elements. This on-vehicle camera device includes a failure-diagnosis processing unit that diagnoses whether the data line signals of imaging element units, are in a fixed state. Furthermore, the imaging element units each include an entire imaging region that is divided into an effective image region and an ineffective image region. Also provided is a diagnosis data region that includes fixation diagnosis data for diagnosing whether the data line signals of the imaging element units in the ineffective image regions are in a fixed state. In an image acquisition period in which image data of the entire imaging region is acquired, and/or an image-calculation processing period, the failure-diagnosis processing unit uses the fixation diagnosis data of the diagnosis data region to perform failure-diagnosis processing.

Claims

1. An on-vehicle camera system that decreases an amount of time required to detect an error in stereoscopic imaging, the system comprising:

a left camera having a first priority;

a right camera having a second priority;

a first processor that performs diagnosis processing; and

a second processor communicatively coupled to the left camera, the right camera and the first processor, wherein the second processor;

receives a left image from the left camera,

receives a right image from the right camera, wherein the left image and the right image each include an effective image region, an ineffective image region, and a diagnostic data region,

determines a processing load of the second processor,

on a condition that the processing load of the second processor exceeds a threshold, causes the first processor to perform the diagnosis processing on either the left image or the right image based on the first priority and the second priority,

on a condition that the processing load of the second processor does not exceed the threshold, causes the first processor to perform the diagnosis processing on both the left image and the right image, and

performs image recognition processing based on the effective image region of the left image and the right image;

wherein the diagnosis processing is performed during an image acquisition period and detecting the error in the stereoscopic imaging by using the diagnosis data region that includes fixation diagnosis data that indicates whether a data line signal of a respective left or right camera is in a fixed state in the ineffective image region, wherein the image acquisition period is a period in which image data of an entire imaging region of a respective left image or right image is acquired.

2. The on-vehicle camera system according to claim 1,

wherein the diagnosis data region is provided on a front side of the effective image region in a data acquisition direction.

3. The on-vehicle camera system according to claim 2,

wherein the diagnosis data region is continuously provided on a front side of a starting point at which the acquisition of the image data of the effective image region starts, in the data acquisition direction.

4. The on-vehicle camera system according to claim 1,

wherein the diagnosis data region is provided on a rear side of the effective image region in a data acquisition direction.

5. The on-vehicle camera system according to claim 4,

wherein the diagnosis data region is continuously provided on a rear side of an ending point at which the acquisition of the image data of the effective image region ends, in the data acquisition direction.

6. The on-vehicle camera system according to claim 1, further comprising:

a third processor that performs calculations to identify solid object from the right image and left image data items during an image calculation processing period;

wherein the diagnosis processing is performed during the image calculation period.