Vehicle mounted stereo camera apparatus

• US 20060204038A1
• Filed: 01/18/2006
• Published: 09/14/2006
• Est. Priority Date: 01/19/2005
• Status: Abandoned Application

• Current Assignee: Hitachi, Ltd.
• Original Assignee: Hitachi, Ltd.
• Inventors: Muramatsu, Shoji, Yokota, Soichiro, Osaka, Ichiro
• Application Number:
  US11/333,235
• Publication Number:
  US 20060204038A1
• Time in Patent Office: Days
• US Class Current: 382/104
• CPC Class Codes: H04N 13/239 using two 2D image sensors having a relative position equal to or related to the interocular distance H04N13/243 takes precedence
• CPC Class Codes: H04N 13/296 Synchronisation thereof; Control thereof

Abstract

A vehicle mounted stereo camera apparatus including a plurality of imaging units for generating image data sequentially based on optical information from an object, and an image processing unit for importing the image data generated by the plurality of imaging units respectively, processing the imported image data individually, and then performing a stereo image process operation. The image data input into the image processing unit are synchronized with clock signals for importing and processing the image data respectively. Thus, the stereo image process operation is performed without horizontal pixel misalignment between image data A and B from the plurality of imaging units, so as to attain a stereo matching process with a high accuracy.

Claims

1. A vehicle mounted stereo camera apparatus comprising:

a plurality of imaging units for generating image data sequentially based on optical information from an object; and

an image processing unit for importing said image data generated by said plurality of imaging units respectively, processing said imported image data individually, and then performing a stereo image process operation;

wherein said image processing unit synchronizes said image data input into said image processing unit with clock signals for importing and processing said image data respectively, so as to perform said stereo image process operation while eliminating horizontal pixel misalignment from said image data from said plurality of imaging units.

2. A vehicle mounted stereo camera apparatus according to claim 1, further comprising:

a plurality of analog-to-digital conversion units provided between said plurality of imaging units and said image processing unit respectively and for converting analog data from said plurality of imaging units into digital data respectively;

wherein clock signals for analog-to-digital conversion used in said plurality of analog-to-digital conversion units respectively are used as clock signals for importing and processing image data from said plurality of imaging units respectively in said image processing unit.

3. A vehicle mounted stereo camera apparatus according to claim 2, further comprising:

a first clock signal generator for generating a clock signal for operating said plurality of imaging units; and

a second clock signal generator for generating a clock signal for operating said plurality of analog-to-digital conversion units;

wherein said first and second clock signal generators operates independently of each other.

4. A vehicle mounted stereo camera apparatus according to claim 2, further comprising:

a clock signal generator for generating clock signals for operating said plurality of imaging units and said plurality of analog-to-digital conversion units respectively.

5. A vehicle mounted stereo camera apparatus comprising:

a plurality of imaging units for generating image data sequentially based on optical information from an object; and

an image processing unit for importing said image data generated by said plurality of imaging units respectively, processing said imported image data individually, and then performing a stereo image process operation;

wherein said image processing unit includes an imaging timing misalignment detection unit for detecting misalignment as to imaging timing among said plurality of imaging units; and

wherein said imaging timing misalignment detection unit detects misalignment as to imaging timing among said plurality of imaging units and outputs timing signals for eliminating said misalignment, respectively to said plurality of imaging units through a timing generator.

6. A vehicle mounted stereo camera apparatus according to claim 5, wherein said image processing unit synchronizes a time of changing over phases of said timing signals output to said plurality of imaging units respectively, with a vertical sync signal.

7. A vehicle mounted stereo camera apparatus according to claim 5, further comprising:

a plurality of analog-to-digital conversion units provided between said plurality of imaging units and said image processing unit respectively and for converting analog data from said plurality of imaging units into digital data respectively;

wherein clock signals for analog-to-digital conversion used in said plurality of analog-to-digital conversion units respectively are used as clock signals for importing and processing image data from said plurality of imaging units respectively in said image processing unit.

8. A vehicle mounted stereo camera apparatus according to claim 7, wherein said image processing unit synchronizes a time of changing over phases of said timing signals output to said plurality of imaging units respectively, with a vertical sync signal.

9. A vehicle mounted stereo camera apparatus comprising:

a plurality of imaging units for generating image data sequentially based on optical information from an object;

an image processing unit for importing said image data generated by said plurality of imaging units respectively, processing said imported image data individually, and then performing a stereo image process operation; and

analog-to-digital conversion units provided between said plurality of imaging units and said image processing unit respectively and for converting analog data from said plurality of imaging units into digital data respectively;

wherein said plurality of imaging units has a configuration in which a CCD sensor and a CMOS sensor are mixed;

wherein said image processing unit generates imaging timing signals and outputs said generated imaging timing signals to said plurality of imaging units respectively, so as to synchronize said plurality of imaging units with one another as to imaging timing; and

wherein clock signals for analog-to-digital conversion used in said analog-to-digital conversion units are used as clock signals for importing and processing image data from said plurality of imaging units in said image processing unit.