Since Google's driverless technology is well known to the world, the related automotive assisted driving system ADAS technology has become the focus of attention. The Shiqiang Advanced Automotive Assisted Driving System (ADAS) solution, based on the SH7766 graphics processor, can be applied to automotive safety systems such as the typical ADAS application such as the Lane Departure Warning System (LDW).
Program Description:
Based on SH7766, Shiqiang and the third-party design company have developed a set of advanced car vision assisted driving system solutions (as shown below), which is the first in the distribution industry! This surround-oriented ADAS system solution has powerful image processing capabilities, enabling ultra-clear images and high-quality color reproduction; perfect picture brightness and darkness, from automatic adjustment of high dynamic range; and only very low CPU occupancy and power consumption. This solution can be applied to automotive safety systems such as lane departure warning systems (LDW), lane keeping assist systems (LKAS) and other typical ADAS applications.
Figure: Block diagram and demo of the advanced car surround assisted driving system launched by Shiqiang and the third party
This round-the-view ADAS system solution offers two calibration modes - fully automatic calibration mode and precision calibration mode:
1. Fully automatic calibration mode is powerful and reliable, and does not require the demanding requirements of camera installation angle; adapt to mass production
2. Semi-automatic precision calibration tools can be used to provide the best calibration results in poor lighting conditions or harsh environments. In addition, the system solution supports super virtual camera mode, can generate virtual view at any viewing angle, and can use virtual camera parameters, focus, generated view, fisheye and pinhole camera.
Other features of Shiqiang’s vision of the ADAS program include:
1. Supporting the lane departure driving warning mode based on the look-around principle: the lane-based lane departure technology opens up new areas and expands the application of the surround driving assistance system;
2. The size of the visible area of ​​the top view is changed by one button;
3. The top view is perfectly stitched and split;
4. Alternatives for a variety of modules (including: 3D effects of the viewing interface; DVR; 3G-based video viewing and information management; voice reversing guides, etc.).
Table 1: Recommended key components for the advanced car vision assisted driving system solution
ABOUT SH7766
The following advantages of the SH7766 are particularly striking:
1. Peripheral object detection (support 4 camera)
The SH7766 SoC is equipped with six video input channels. Among them, four channels use NTSC analog-to-digital converter (ADC). This means that the necessary functions of the NTSC camera system can be provided on a single chip. In addition, multiple video input channels can be used to implement multiple applications, using the features offered on a single chip. For example, digital dual-channel input can be used during normal driving, and NTSC four-channel input can be switched at intersection and parking.
2. High performance image recognition engine
The SH7766 SoC is equipped with the IMP-X2 next-generation image recognition engine. The IMP-X2 maintains database compatibility with Renesas' existing image processing engine (IMP) while increasing processing performance by more than four times, enabling it to perform multiple processing tasks in parallel, such as tracking lanes, flags, and Marking lines, pedestrians and vehicles. In addition, it has added a number of functions, such as panoramic image generation, which uses image recognition algorithms that are judged by pedestrians, vehicles, etc. Through the cooperation between the IMP-X2 and the CPU on the same chip for processing, advanced image recognition performance is achieved while maintaining low power consumption.
3. Integrated DRC, support brightness correction and compensation
Relying on the dynamic range control (DRC, Dynamic Range Control) function, even if it is processing multiple video images with different brightness at the sun and the shade, the composite video brightness can be adjusted to compensate for the over-brightness and the darkness, so that the driver can See the image display more clearly.
4. Built-in distortion correction hardware IMR
The Image Renderer (IMR, Image Render Engine) viewpoint conversion engine can generate a viewfinder image that is different depending on the video input or scene. The triangle mesh is used to correct the distortion mode, and the vertex data in the rectangular mesh is automatically generated. Perform distortion correction, rotation, reduction or enlargement.
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