WDR Megapixel Camera Shootout

Author: Antony Look, Published on Jul 30, 2011

Dealing with direct sunlight is one of video surveillance's toughest problems. Avoiding the sun is frequently impossible. Making things worse, when a scene has direct sunlight creating both dark and bright areas, image quality can suffer dramatically.

In video surveillance, the technical term used to describe a camera's ability to handle these conditions is WDR or Wide Dynamic Range. In this context, range refers to the variations of light levels that a camera can capture and deliver a quality image. The greater the range, the more likely the camera can handle both very bright and dark areas (e.g., sunlight on a person's face, shadow on the car in the corner).

Earlier this year, we did our first WDR shootout with (2) SD and (2) MP cameras. One of the clear, yet surprising, results was that cameras with more pixels (i.e., megapixel) tended to outperform (i.e., capture more image details) than standard resolution cameras, even if the SD cameras were marketed as supporting WDR.

Given those results, in this test, we wanted to learn more about the differences in megapixel camera WDR performance. To do so, we tested 6 Megapixel cameras from Arecont Vision (AV1315), Axis (P1344), Panasonic (WV-SP306 and WV-NP502), Sony (CH140) and Vivotek (IP8151P) to see who was the best and worst at handling WDR scenes.

[UPDATE 2012: We have tested the Axis Q1604 against the best performing WDR cameras in this group.]

We picked 2 common real world scene:

  • Doorway entrance facing outdoors - this is a common pain point for users who cannot properly identify individuals coming inside for hours a day as the sun faces the door
  • Sun setting in the line of sight of an outdoor camera - this is a frequent problem for parking lot and street surveillance. Accidents or thefts occurring during those times of day can be obscured by the sun.

In addition to testing core WDR performances, we did additional testing of 2 advanced features to see what benefits they provide:

  • Face WDR: Panasonic has an optional feature that can detect faces and then adjusts exposure to maximize the image quality of the detected face.
  • Exposure Regions: A number of cameras, including Arecont and Axis, support exposure regions that allow lighting to be optimized for a specific area of the scene (e.g. region specified for where faces normally appear).

Below is a preview of our test results from the doorway showing fairly dramatic differences among the 6 megapixel cameras tested:

Inside the Pro section, we share full results and rankings of each camera's doorway performance.

Below is a preview of our test results from the outdoor setting sun scene showing major performance differences among the 6 megapixel cameras tested:

Get Video Surveillance News In Your Inbox
Get Video Surveillance News In Your Inbox

Inside the Pro section, we share full results and rankings of each camera's setting sun performance.

General Rankings

Our tests revealed a fairly consistent pattern of performance variations. Based on observable differences in image quality captured, we rank the 6 camera's performance into 4 major categories:

  • Superior: Sony CH140
  • Above Average: Panasonic WV-SP306 and WV-NP502
  • Below Average: Arecont AV1315 and Axis P1344
  • Inferior: Vivotek IP8151P

Below, of course, are the raw video clips and the prepared image comparisons so that you can judge for yourself.

Key Findings and Recommendations

Here are the key findings:

  • WDR performance was generally better in cameras specifically marketing or stating WDR enhancements/capabilities - namely Panasonic WV-SP306, Panasonic WV-NP502, and Sony CH140. The exception was the Vivotek IP8151P
  • Cameras demonstrating good/strong WDR performance (indoor hallway), tended to handle harsh direct sunlight conditions effectively as well
  • Direct harsh sunlight does not necessarily produce a lighting differential that is characteristic of a WDR scene, but WDR capabilities appear to improve image results nonetheless
  • The Sony CH140 consistently outperformed the field throughout the WDR tests
  • The Panasonic WV-SP306 and WV-NP502 generally outperformed the field, except the Sony CH140, throughout the WDR tests
  • The Panasonic WV-SP306 performed similarly to its Panasonic counterpart and predecessor the WV-NP502 in the majority of WDR tests. This is despite marketing claims that MegaSuperDynamic (WV-NP502) is more advanced than SuperDynamic (WV-SP306)
  • The Panasonic WV-NP502 exhibited delay 'turning on' WDR when conditions changed suddenly
  • The Panasonic camera's face WDR feature did not demonstrate any practical benefits in our tests.
  • Exposure regions (such as with the Arecont) were generally or overall detrimental to image quality for a majority of the WDR test scenarios

In light of these findings the following is recommended:

  • Consider cameras with proven WDR capabilities for both conventional WDR scenes (e.g. bright doorway or window) and scenes with direct sunlight. Such cameras can significantly improve image quality under these difficult lighting conditions
  • If you are considering a Sony camera for a WDR application, note that WDR is only available in their premium line (V series, i.e., the CH140 but NOT the CH120)
  • If your WDR application undergoes abrupt changes in lighting (e.g. door opening suddenly) consider a Sony WDR over a Panasonic WDR camera. If not subject to sudden changes in lighting, you may wish to consider the Panasonic WV-SP306 at ~$350 less than the Sony CH140 online
  • In general, do not expect or rely on exposure regions to solve issues in WDR type scenes

Download Video Clips

To review the raw video, download the sample clips from each test run:

Indoor Hallway (Door Propped)

This is a prototypical WDR scenario of a long hallway with a propped open doorway creating an intense backlight relative to a dimly lit hallway. The lux differential peaks to roughly 20x when the subject is positioned very near to the cameras.

Bright (~1500 Lux)

There is quite a spectrum of reactions by the various cameras to the intense WDR/backlight in this scene. At one end is the CH140, which renders strong details within the backlit regions. The WV-SP306 and WV-NP502 are able to produce modest level of details within the backlit regions. At the other end of the spectrum is the IP8151, in which the image is nearly completely washed out and is of little utility at this point.

Dark (~150 Lux)

At this point in the scene the lighting differential is ~10x, and the two Panasonics and the Sony appear to handle the variation quite effectively. In contrast the rest of the field exhibit some level of over exposure or characteristic white haze effect.

Darker (~75 Lux)

Here at a ~20x lighting differential is where differences become much more apparent between cameras. In the 1315DN and IP8151 the subject's face is severely under exposed - almost a complete silhouette. The Panasonics and the CH140 provide a relatively better level of exposure of the subject. Interestingly, the P1344's image of the subject is somewhat over-exposed.

Indoor Hallway (Door Closed/Open)

This scenario is a variation of the same hallway scene, except that the door is now opened and closed. The key differences to note here are that the backlighting is introduced 'suddenly' into the scene when the subject opens the door; and furthermore, as the door closes passively behind the subject the lighting differential decreases rapidly - eventually returning to a non-WDR scene.

Bright (~1100 Lux)

As the door is opened the scene experiences an abrupt increase in WDR character. Interestingly the WV-NP502 appears slow to react. This is evidenced by the subject appearing slightly more washed out in this scene versus the previous scene where the door is propped open, and also by the fact that the sign on the door - '5' - is completely obscured.

Dark (~120 Lux)

When the subject arrives at this position the backlit region is considerably less than the ~1100 lux at initial opening. The lux differential is therefore only ~5x, and across the board cameras appear to provide better image quality compared to the previous 10x 'dark' scene.

Darker (~25 Lux)

At this point the door has completely closed and the scene is no longer one with WDR characteristics. As a result even the 1315DN and IP8151, which were completely under-exposed in the previous 'propped' counterpart scene now provide relatively well exposed images of the subject.

Outdoor Direct Sunlight

In this scene harsh sunlight is directed into the cameras and poses a particularly challenging lighting situation. The first composite is fully zoomed out to demonstrate the overall effect the difficult lighting has on each camera.

Overview Composite

The same cameras performing well in the indoor WDR scenes (namely, the WV-SP306, WV-NP502 and CH140) appear to do well in this outdoor scene as well . The converse appears true as well with the P1344, 1315DN and IP8151 showing signs of difficulty with the harsh lighting.

Digitally Zoomed Composite (Wide FoV ~50ft)

The P1344 and IP8151 are severely washed out compared to the field. They also have a distinct pinkish tinge or haze blanketing their images. The Panasonics and Sony are relatively better than the rest of the field, but blurriness and lack of sharpness still limit facial details at this wider FoV.

Digitally Zoomed Composite (Narrow FoV ~20ft)

At this nearer FoV details begin to emerge from the Panasonics and Sony images. There is little sign of lighting difficulties present in their images as well. The WV-NP502 exhibits particularly good contrast and facial details. In contrast the P1344 and IP8151 continue to provide poor subject facial details and show considerable signs of adverse lighting effects.

Additional WDR Techniques

Face WDR (Panasonic)

Both Panasonics tested support a feature called Face WDR. It requires that an analytic feature called face detection be enabled. After a face is detected within the scene, the camera purports to use WDR enhancements around the face to better resolve facial details.

Below is the WV-SP306 with a Face WDR off/on comparison:

Below is the WV-NP502 with a Face WDR off/on comparison:

The foregoing comparisons assume that Face WDR was indeed triggered at the point of the 'ON' snapshots. However, as this event is monitored through a separate interface (the camera's web interface), exact confirmation was difficult to ascertain. Based on preliminary testing however, the subject is in a region where the face detection showed a high probability of being triggered. Through these initial tests it was also noticed that face detection/face WDR events did not correspond to any meaningful improvements in facial detail or clarity.

With these reservations in mind, the images depict no clear advantages to using Face WDR in this particular test scenario.

Exposure Region (Arecont)

In this battery of tests, we configure exposure regions on the bright areas of both the indoor hallway scene and the outdoor harsh sunlight scene. The overall effects of this strategy are evaluated via the composite below:

Placing an exposure region around the door frame when the door is propped open, decreases overall exposure on the subject when in the bright area. This tends to provide a better overall image of the subject at this point. However, the rest of the scene is essentially 'blacked-out', and the subject is totally undetectable throughout most parts of the hallway interior.

In the next scenario when the door is initially closed, the abrupt opening causes the subject to become under-exposed with the same exposure region in effect. The subject is still considerably under-exposed as he moves inside and to the left. As the subject progresses, and the door shuts behind him, the image obviously improves (not shown) but this is due to an evening out of lighting (loss of WDR character) in the scene and not due to the exposure region.

In the outdoor scenario an exposure region placed near the bright horizon causes the entire picture to darken. As a result, the majority of the scene is heavily under-exposed, significantly obscuring subject and other object details.

Methodology

Here are the six (6) cameras used in the WDR Mega-Shootout:

  • Arecont AV1315DN (online $460) - 1.3MP D/N; 1/2.7" CMOS; MPL4-10; 0.1/0 (Color/BW)
  • Axis P1344 (online $759) - 720p D/N; 1/4" CMOS; F1.2 Computar ; 0.05 Lux (BW)
  • Panasonic WV-SP306 (online $550) - 1.3MP D/N; 1/3" MOS; WV-LZA62/2 lens; 0.3/0.05 lux (Color/BW)
  • Panasonic WV-NP502 (online $950) - 3MP D/N; 1/3" CCD; WV-LZA62/2 lens; 1.0/0.08 lux (Color/BW)
  • Sony CH140 (online $800) - 720p D/N; 1/3" CMOS; F1.2 Fujinon; 0.1 Lux (BW)
  • Vivotek IP8151 (online $754) - 1.3MP; F1.2 Computar; 0.04/0.001 (Color/BW)

All camera lenses were configured at a uniform lens angle (~45 degrees) in order to make fair comparisons. Video was simultaneously recorded and analyzed at their highest VMS supported resolutions. WDR was enabled on all cameras supporting it (WV-SP306, WV-NP502, CH140, P1344). Note the IP8151 markets as a WDR enhanced camera, but apparently does not require it be enabled manually; also the 1315DN is not marketed as having an explicit WDR capability.

Here are the 3 key scenarios:

  • Indoor Hallway (Door Propped)
  • Indoor Hallway (Door Closed/Opened)
  • Outdoor Harsh Direct Sunlight

Each scenario involved two (2) recordings. The first involved basic WDR turned on, while the second involved turning on Face WDR on the Panasonic cameras and an exposure region configured on the AV1315DN.

4 reports cite this report:

Prebid Meetings and Walkthroughs on Mar 06, 2012
Integrators who fail to take prebid meetings and walkthroughs seriously can lose the job or lose their shirt when responding to RFPs. While prebid...
Directory of Camera Shootout Series on Dec 27, 2011
The following directory lists all of our camera shootouts. These shootouts pit 4 - 8 different surveillance cameras in simultaneous tests on real...
Top 12 Reports for 2011 on Dec 25, 2011
Here are our top 12 reports for 2011, starting with the state of the surveillance industry: 2012 Video Surveillance Guide - Key trends reviewed...
Axis Q1604 WDR Camera Reviewed on Sep 18, 2011
In September 2011, Axis announced a new HD camera, the Q1604, optimized for Wide Dynamic Range (WDR) performance. This camera joins the low light...
Comments : PRO Members only. Login. or Join.

Related Reports on WDR

Mobotix Releases 'Move' Into 21st Century on Jun 20, 2018
For years, Mobotix stood resolutely against, well, every other manufacturer, selling it as a virtue: MOBOTIX equipment is designed with no...
Introducing Effective PPF (ePPF) - Improving Video Surveillance Designs on Jun 11, 2018
Pixel density (PPF / PPM) is the best metric the industry has to define and project video quality. It allows simple communication of estimated...
Hanwha Low-Cost 4MP Camera Tested (QNV-7010R) on Jun 11, 2018
4MP usage is increasing noticeably, as IPVM 2018 resolution statistics show. And low-cost, fixed focal cameras, are popular for budget...
Stats: Upgrading Cameras Far More Common Than Replacing Failed Cameras on May 30, 2018
The old saying "If It Ain't Broke, Don't Fix It" does not apply here. New IPVM statistics show that 60% of cameras that are replaced still work but...
Last Chance - May 2018 Camera Course on May 03, 2018
This is the last chance to register as the course starts next week. This is the only independent surveillance camera course, based on in-depth...
Axis Launches First Stereographic Panoramic Camera on Apr 05, 2018
Fisheye panoramics have not had much innovation in the past few years, with their multi-imager cousins getting most of the advances, e.g.,...
Dahua 4K Micro 4/3 Camera Tested (IPC-HF8835F) on Apr 03, 2018
Dahua is going big. Their new 4K HF8835F Micro Four Thirds sensor is one of the largest now on the market. Dahua is claming: Starlight...
Axis Z-Wave IP Camera Tested Poorly on Mar 20, 2018
Z-Wave is drawing notable interest for video surveillance use. In IPVM's initial coverage, 84% expressed interest in it, with nearly half being...
Camera Form Factor Guide on Mar 16, 2018
When selecting surveillance cameras, users may choose from a number of different form factors, each with its own unique strengths and weaknesses,...
Next Gen 5MP / 6MP Camera Shootout (Axis vs Dahua vs Hanwha vs Hikvision) on Feb 28, 2018
Many manufacturers have released new generation 5MP / 6MP cameras that tout super low light, WDR and other features historically typical in 1080p...

Most Recent Industry Reports

Installation Hardware for Video Surveillance - Indoor Fasteners on Jun 22, 2018
As part of our Installation for Video Surveillance series, in this note, we cover drywall anchors. A key part of installing security hardware is...
Hikvision ColorVu Integrated Visible Light Cameras Examined on Jun 22, 2018
When it comes to low light, infrared light has become the defacto standard in surveillance. But IR is limited to monochrome images, making colors...
Last Chance - Save $50 - July 2018 IP Networking Course on Jun 21, 2018
Today, Thursday the 21st is the last chance to save $50 on registration. Register now and save. This is the only networking course designed...
'Secure Channel' OSDP Access Control Examined on Jun 21, 2018
Despite claiming to be better than Wiegand, OSDP's initial releases did not address the lack of encryption between reader and controller, leaving...
Most Wanted Improvements In Manufacturer Technical Support (Statistics) on Jun 21, 2018
5 key areas of improvement and 1 clear wanted support feature were voiced by 140+ integrator responses to: What improvement in manufacturer...
GDPR / ICO Complaint Filed Against IFSEC Show Facial Recognition on Jun 20, 2018
IPVM has filed a complaint against IFSEC’s parent company UBM based on our concern that the conference violates core GDPR principles on...
IFSEC 2018 Final Show Report on Jun 20, 2018
IPVM attended the IFSEC show for the first time this year. The Chinese have taken over the UK, centered on Hikvision, flanked by Dahua, Huawei and...
Mobotix Releases 'Move' Into 21st Century on Jun 20, 2018
For years, Mobotix stood resolutely against, well, every other manufacturer, selling it as a virtue: MOBOTIX equipment is designed with no...
Cybersecurity Startup VDOO Disclosing 10 Manufacturer Vulnerabilities Starting With Axis And Foscam on Jun 20, 2018
Cybersecurity startup VDOO has uncovered significant vulnerabilities in Axis cameras along with many others not yet disclosed. In this report, we...
Axis Guardian - Cloud VMS And Alarm Monitoring - Released on Jun 19, 2018
Axis has struggled to deliver a cloud-based managed service video platform. Video service providers have utilized AVHS for over a decade, and have...

The world's leading video surveillance information source, IPVM provides the best reporting, testing and training for 10,000+ members globally. Dedicated to independent and objective information, we uniquely refuse any and all advertisements, sponsorship and consulting from manufacturers.

About | FAQ | Contact