Difference between HDR and WDR in 70mai dash cams

What about Wide Dynamic Range (WDR)?

The capacity of the camera to capture information in both bright and dark areas of the video is known as wide dynamic range, or WDR. By combining many exposures of the same scene, it produces a final image with balanced brightness and contrast. Because it enables the camera to simultaneously capture dark and bright regions, this is particularly useful while driving through areas with a lot of shadows, such tunnels or underpasses.WDR uses image sensors and a digital signal processor (DSP) to provide uniform lighting to all areas of an image. Each video frame is scanned twice by two sensors in a WDR-capable camera. The first shows the photograph under typical lighting conditions and was taken with a slow shutter speed (to catch more light). In order to get a photo with brilliant light in the backdrop while capturing less light overall, the second can is done quickly. The two scans are combined by the camera to produce a single, balanced, well-lit image.

Are all HDR and WDR cameras the same?

HDR and WDR are both solutions for improving detail in the darker areas of imaging.

WDR

WDR, Wide Dynamic Range, can be simply understood as the ability of a camera to distinguish between black and white, so that both the brightest and darkest parts of a scene can be seen especially well at the same time, thus providing a clearer and more detailed image. WDR tends to accomplish this through hardware

HDR

HDR, High Dynamic Range Imaging, differs in that it also aims to increase the difference in brightness between the brightest and darkest parts of an image. HDR tends to do this through software. hdr involves taking a number of photos of three exposure versions in succession, and then combining these photos into a single output.

HDR is a hardware solution that requires support from the primary CPU and the image sensor, while WDR is only a software solution.

DB units

The dB units should also be taken into account. The ratio of the brightest and darkest things that the camera can capture is known as the dB (decibels) unit. This outlines the range in which HDR and WDR function. Your low-light image will be better the higher the ratio, the greater the difference between the low-light and high-light spectrums that the security camera can capture. To put it another way, the better the camera does in both high and low light, the higher the dB number. Nevertheless, only one of the two can win.

A location with bright windows and dimly lit interiors. The light from the windows is much brighter than the light from the interior of the walls, and if the dynamic range is not large enough, this is when either the light from the windows is too bright and overexposed (it looks white or the walls are too dark and underexposed (it looks black), which can cause the image to lose detail. The greater the dynamic range, the more you can retain as much information as possible in these highlight and shadow areas.

Which is better? HDR or WDR?

70mai dash cameras with WDR and HDR are both capable features designed to improve video quality, particularly in low light conditions. Although each manufacturer has a different definition, WDR typically refers to a camera's capacity to produce excellent images across a range of lighting circumstances.

An HDR camera (such as 70mai Dash Cam A510) can better highlight darker parts of a picture without overexposing brighter regions, even if WDR can aid with image quality in dynamic lighting situations.

How WDR and HDR are used in 70mai dashcam？

By combining numerous exposures to balance the bright and dark parts of a picture, HDR technology enhances image quality. This is how it operates:

Multiple Exposures: HDR swiftly takes a number of pictures at various exposure settings, such as normal, overexposed, and underexposed.

Combining Exposures: The brightest and darkest portions of the picture are preserved by combining these photos into a single frame.

The camera and the conditions in which it will be utilised will determine which is best for a dashcam. Generally speaking, HDR will be better at collecting a greater range of features and colours throughout the picture, whereas WDR may be more useful for driving in high contrast situations. Our choice is HDR, particularly for dash cams, where the most advanced models with superior picture sensors take full advantage of this function.