Among the many features dash cams offer, one of the tell-tale signs of a high quality one is WDR, which stands for Wide Dynamic Range. In this article, we’ll elaborate on the importance of WDR in dash cameras. We’ll also compare it to other camera tech like High Dynamic Range (HDR).
Wide Dynamic Range Cameras
Imagine you’re driving down a road during sunset, your dash cam’s recording, but the video footage is useless because of the blinding sun. This is where WDR comes to the rescue!
WDR tech helps cameras capture better footage in drastic lighting changes. By balancing the exposure of bright and dark areas in a single frame, the dash cam is able to create detailed image with minimal picture loss.
This tech is especially helpful for dash cams because they’re always in new lighting environments, like driving under a street light at night or entering a tunnel during the day.
WDR Technology for Camera Lens Imaging
WDR cameras work by taking the final image at different light exposures and combining them into a single frame. This process relies on the camera lens & image sensor. When the camera lens captures light, the WDR image sensor converts it into an electrical signal that is then processed into a digital image.
High-quality lenses and image sensors play a crucial role in WDR performance. In order to work properly, a camera must capture wide ranges of light levels without distortion for the image to be sharp.
Dash cameras aren’t the only kind of cam that has WDR. It’s also important in video surveillance cameras and security cameras, because image quality is critical for identifying potential security threats. High Dynamic Range (HDR) is often used in these cameras to achieve similar results as WDR in dash cams.
HDR uses several pictures (at different exposures), then combines them during the rendering process. It’s similar to WDR, in that, they both use a wide range of bright and dark areas to create a balanced end result.
Shutter Speed for WDR Cameras
Shutter speeds plays a significant role in dynamic range performance. In WDR cameras, the length of time the camera’s sensor is exposed to light.
A fast shutter speed can freeze motion, while a slow shutter speed can result in motion blur.
To work effectively, a digital WDR camera quickly captures superior image at different exposures.
Different shutter speeds must be fast enough to capture each image without motion blur, ensuring that the final image is sharp.
Some dash cams also use electronic rolling shutters, which capture images by scanning the sensor from top to bottom. This can cause distortion, especially when the camera or subject is moving quickly. To minimize this effect, the camera should have a high-performance image sensor for a fast readout speed.
In comparison to other video cameras, such as a video surveillance cameras, shutter speed is much more important for a dash camera’s ability to produce high dynamic range footage. A rear dash cam is exposed to more dark and bright areas relative to a stationary surveillance camera.
How to Choose a WDR Dash Cam
With the technical aspects of WDR out of the way, lets go over how to take advantage of it.
When shopping for a dash camera lens, consider the WDR capabilities of different model dash cams. Important factors to look for include:
- Sensor Quality: Look for cameras with high-quality image sensors from reputable manufacturers, since this is the most important aspect of WDR performance.
- Lens Quality: High-quality lenses capture images free of distortion. When looking at lens quality, you’ll typically want to stay away from lens crafted overseas. While there are a ton of goods that can be reproduced in 3rd world countries with the same effectiveness (for cheaper), a camera lens isn’t one of them.
- Shutter Speed: The camera’s shutter speed should be fast enough to capture multiple images at different exposures quickly, reducing the likelihood of motion blur in the final composite image.
- WDR Implementation: Some cameras may advertise WDR, but their implementation may not be as effective as others. Look for reviews and sample footage to ensure that the WDR feature performs well in real-world conditions.
Typically dash cams that satisfy the above requirements are pretty costly (for good reason) as mentioned in our price guide. With that being said, exceptions exist if you look hard enough.
Examples of an affordable HDR & WDR car camera is the Vantrue N4, & Redtiger F7N dash cam accordingly. There’s a ton of WDR dash cams on the market though, so in the next section we’ll go over how you can make the most of wide dynamic range if your dash cam has it.
Making the Most of WDR on Your Dash Cam
Once you’ve chosen a dash cam with WDR, it’s essential to make the most of this feature to get the best possible footage. Here are some tips to help you:
- Keep Your Windshield Clean: Dirty windshields reduce WDR effectiveness. Glare makes it harder for cameras to capture clear images. The easiest way to minimize glare is to clean your windshield on both the inside and out.
- Update Firmware: Manufacturers may release firmware updates that improve the performance of the WDR feature on your dash cam. Keep your dash cam’s firmware up to date to ensure optimal performance.
- Adjust Settings: Some dash cams allow you to adjust the WDR settings, such as the number of exposures or the range between exposures. Experiment with these settings to find the best balance between detail and noise in your footage.
- Properly Positioned Dash Cam: Make sure your dash cam is mounted with a clear view of the road. Don’t position your dash camera too close to the rearview mirror because it’ll impact WDR performance.
WDR vs HDR
WDR and HDR are sometimes used interchangeably but from a technical sense, they’re very different. As mentioned earlier, WDR is specifically designed to balance the exposure of bright and dark areas in a single frame, making it ideal for rapidly changing lighting conditions.
HDR is a general term referring to the broader technique to display wide dynamic range imaging. While WDR focuses on combining multiple images with different exposures, HDR can also involve advanced image processing algorithms and display technologies to reproduce a wider range of colors & brightness levels.
The distinction between WDR cameras and an HDR camera can be blurry, as some use elements of both techniques to achieve results. The specific implementation of WDR or HDR is less important than the overall effectiveness in the real world. For example, the Cobra SC 400D dash cam has HDR technology, yet the camera quality is just as clear any WDR dash cam I’ve used.
Wide Dynamic Range FAQ
Yes, we recommend turning on WDR on your dash cam. WDR improves the image quality by balancing exposure from light and dark areas throughout the duration of a video. Enabling WDR helps capture more detailed footage, and because you never know when an accident might happen, we recommend always having it on. It’s especially useful in challenging lighting situations, like driving into sunlight or during the night. The only real downside to WDR cameras is the video file size, since it’s usually larger than those without wide dynamic range.
Yes, WDR can be effective at night, as it helps balance the exposure of bright and dark areas in the footage. This results in a clearer, more balanced image of the road. Nighttime WDR effectiveness depends on the camera’s lens quality, image sensor, and how WDR is implemented into the broader range your camera. In addition to WDR, having a camera with good less-light exposure performance & infrared capabilities can further enhance night-time footage quality.
To set up your WDR dash cam, follow these steps:
1. Mount the dash cam on your windshield while making sure it has an unobstructed road view.
2. Connect the power cable to the camera and your vehicle’s power source.
3. Turn it on and navigate to the dash cam settings menu.
4. Locate the WDR option and enable it. This may be labeled as “WDR,” “Wide Dynamic Range,” or something similar, depending on the camera model.
5. Adjust any other settings, such as exposure or video quality, as desired.
6. Test the camera by taking some sample footage in various lighting conditions to ensure the WDR feature is working correctly.
For a more detailed guide on how to install (any type of) dash cam, read our step-by-step tutorial on how to install a dash cam for beginners.
If your WDR dash cam keeps turning off, there’s a few possible reasons:
Power Source Issues: Ensure the power cable is properly connected to the camera and your vehicle’s power source. Check for any loose connections or damaged cables. Make sure everything is still plugged in and hide your dash cam wires to prevent this from happening in the future.
Overheating: Dash cams can generate heat during operation, and if the camera gets too hot, it may shut down to protect itself. Make sure the dash camera is not in direct sunlight for prolonged periods, which might seem impossible due to the nature of a dash cam. Some easy ways to prevent overheating are parking in the shade, storing your dash cam in glovebox when it’s not being used, and device ventilation around the based.
Firmware: Firmware bugs can cause unexpected behavior, including the camera turning off. Check the manufacturer’s website for firmware updates. Follow their instructions to update your specific model.
Faulty Hardware: If none of the above solutions work, there could be an issue with the camera’s hardware. In this case, contact the manufacturer or the retailer for support or a possible replacement.
The best exposure setting varies, depending on your current lighting conditions. Most dash cams have an automatic exposure setting that adjusts the exposure based on available light. Auto-exposure settings are best for dash cams, due to the constant change in scenery. With that being said, if your footage is always too bright or too dark, experiment with manual exposure settings to achieve your desired result.
Final Words
WDR technology is a valuable feature for every dash cam user because it enables crystal clear footage in bad lighting conditions. By understanding the importance of lens quality & image sensor performance in true WDR cameras, you can choose a dash cam to get the most out your video footage.
Don’t have a dash cam yet? Here’s a few reasons to get one. As dash cams continue to evolve & incorporate new technologies, wide dynamic range will undoubtedly become even more effective.
About the Author
15 thoughts on “What is WDR on a Dash Cam?”