Is it necessary to buy front and rear cameras for a dashcam?

It is recommended to choose a dashcam with both front and rear cameras. The rear camera can record rear-end collisions or monitor the rear of the car when parked. Currently, 60% of traffic accidents are related to rear-end collisions, which occur at the rear of the vehicle. A single front camera dashcam can only record the situation in front of the car and cannot capture events occurring at the rear, limiting its ability to provide video evidence. Rear cameras in streaming rearview mirrors are directly installed at the rear of the car, without any obstruction. Their wide field of view reduces the driver's blind spots, enhancing driving safety. Streaming rearview mirror dashcams can record videos and support reverse camera images, serving as an aid during reverse maneuvers.

How to choose a Streaming Rearview Mirror?

Even if two cameras use SONY sensors with dynamic pixels of 500W, the recorded effects may differ. Factors such as lens, aperture, and software algorithms play crucial roles. A smaller aperture (F value) results in better night vision, but too small may cause overexposure during the day. To balance day and night effects, an F value around 1.6 is considered optimal. WDR (Wide Dynamic Range) and HDR (High Dynamic Range) also influence the recorded effects. WDR ensures clarity in both bright and dark areas simultaneously. The choice between WDR and HDR depends on the specific requirements of the recording environment.

Why do cameras with the same sensor produce completely different results in different cars, locations, and lighting conditions? This is mainly due to the relationship between WDR and HDR. WDR, or Wide Dynamic Range, ensures clear visibility in both very bright and very dark areas simultaneously. The WDR range is the ratio of the brightest signal value the image can distinguish to the darkest signal value it can distinguish. When there is strong light or relatively low brightness, such as in backlight situations, the camera image may appear particularly bright or dark. WDR prevents overexposure in bright areas and underexposure in dark areas, significantly impacting video clarity and quality.

Choosing a streaming rearview mirror style, the mirror effect is crucial, and its importance is usually only realized after use. For instance, on a sunny day, insufficient screen brightness can cause the displayed image to overlap with the external scene outside the rear window. Nighttime screen brightness cannot be too high to avoid glare. Therefore, it is recommended to choose a style with adjustable screen brightness, such as the Yunlu GS Max and PAPAGO P5. If the anti-glare effect of the screen is poor, the mirror may reflect light at night, making it difficult to see behind.

Reverse image display is a basic function of streaming rearview mirror dashcams. The reverse camera is usually installed near the license plate, and it automatically switches to the camera image when reversing. Installation is generally less damaging to the car. Currently, rear cameras come in two types: CCD and AHD. CCD cameras use a single photosensitive sensor, while AHD cameras use a sensor connected to an amplifier. CCD requires additional voltage, resulting in higher power consumption, while AHD amplifies directly, resulting in lower power consumption. The cost of CCD varies depending on the lens standard, and AHD generally has higher costs. Many affordable streaming rearview mirror dashcams use CCD for their reverse camera lens, while AHD cameras are generally more expensive but offer higher clarity.

Our company has been in the rearview camera industry since 2005, with professional engineers and sales staff. Please contact us for assistance in selecting the most suitable product. You can learn more about our streaming rearview mirrors through our webiste.