When browsing high-end dashcams or security cameras, you often see the term "STARVIS 2." This refers to Sony's advanced image sensor technology, widely used in devices like dashcams to provide high-definition, low-noise video.
But what makes it special? STARVIS 2 utilizes an iterative back-illuminated pixel structure, boasting high pixel counts and superior light sensitivity. A prime example is the IMX678 sensor (8MP). It captures more detail, drastically reduces noise in low-light environments, and minimizes motion blur in fast-moving scenarios.
As an image sensor powered by STARVIS 2 technology, the IMX678 combines the inherent advantages of the sensor with the performance boost of the new architecture. Here is a breakdown of its specific advantages:
1. Exceptional Low-Light Performance
The STARVIS 2 technology uses a back-illuminated pixel structure that gives the IMX678 ultra-high sensitivity. It can effectively capture light in extremely dark environments—producing color images even in near-zero light conditions. Paired with Super High Conversion Gain technology, it delivers excellent low-noise performance, restoring clear details where other sensors fail.
2. High Dynamic Range (HDR) Imaging
The sensor features Clear HDR. Unlike traditional HDR, this function synthesizes low-gain and high-gain images simultaneously using gain difference. This prevents common issues like blurred contours or chromatic aberration (ghosting) on moving objects.
With a dynamic range of approximately 88dB, it handles scenes with high contrast—such as driving out of a tunnel or facing direct sunlight—by suppressing overexposure in bright areas and clarifying dark areas.
3. High Resolution and Delicate Image Quality
The IMX678 boasts 4K resolution (3840×2160P). Thanks to its large sensor size and pixel area, it captures rich details with a delicate finish. Whether you are recording distant scenery or need to zoom in to check specific details, the clarity is preserved.
4. Rapid Response and Precise Focus
With high-speed image data processing capabilities, the IMX678 achieves fast autofocus and high-speed shooting. This is critical for dynamic scenes—such as moving vehicles or pedestrians—allowing for clear snapshots with reduced trailing or ghosting. This makes it perfectly suited for dashcams and security monitoring where recording fast-moving objects is essential.
5. Near-Infrared (NIR) Sensitivity
STARVIS 2 technology has improved the absorption rate of near-infrared light. This allows the IMX678 to image effectively even under near-infrared lighting conditions, expanding its use cases to security and surveillance fields that rely on infrared auxiliary lighting.
DANSKER S63 (IMX 678)
DANSKER S62 (IMX 678)
STARVIS vs. STARVIS 2: What is the Technical Leap?
How does the second generation compare to the original? The technical innovations are significant.
| Feature | STARVIS (Gen 1) | STARVIS 2 (Gen 2) |
|---|---|---|
| Dynamic Range | Basic Level | Improved by 8dB or more (Single Exposure) |
| HDR Technology | DOL HDR (Prone to motion artifacts) | Clear HDR (Simultaneous capture synthesis, artifact-free) |
| Min. Illumination | Approx. 0.006lx | 0.00016lx (37.5x Improvement) |
| NIR Sensitivity | Standard | 2.5x Improvement (Enhanced in 850-1000nm range) |
| Pixel Structure | Back-Illuminated | Optimized Back-Illuminated, Photodiode Improvements |
Key Improvements in STARVIS 2
- Clear HDR Function: By shooting bright and dark areas simultaneously with different gains, this solves the chromatic aberration and artifact issues found in the first generation's DOL HDR during high-speed scenes.
- Near-Infrared Optimization: A unique convex/concave texture design improves the absorption rate of near-infrared light, outputting low-noise NIR images even under IR lighting.
- Photodiode Improvements: The sensor uses a vertical charge accumulation structure to expand the charge capacity, further boosting sensitivity and dynamic range.
Real-World Application and Performance
When applied to devices like dashcams, STARVIS 2 delivers tangible benefits:
- Drastic Sensitivity Boost: Low-light performance is enhanced by 105%, and high dynamic range is improved by 10%.
- Superior Clarity: Images are more vibrant with richer details, significantly improving license plate recognition capabilities.
- Power Efficiency: Lower power consumption, which is particularly beneficial during parking mode recording.
Sony has released multiple sensors featuring STARVIS 2 technology, including the IMX662, IMX664, and IMX675, which are now widely adopted in various high-quality imaging devices.