Many manufacturers have released new generation 5MP / 6MP cameras that tout super low light, WDR and other features historically typical in 1080p but not 5MP / 6MP. In our recent series of tests we tested four of these models from major manufacturers against their own comparable 1080p version:

• Axis Q3517-LVE Tested
• Dahua N52BM3Z Tested
• Hanwha XNV-8080R Tested
• Hikvision DS-2CD4565-IZH Tested

Now, in this shootout, we put them head to head and report on how they compare. Inside we report on:

• IR performance
• Color low light performance
• WDR performance
• Full light image quality
• Price comparison
• Physical comparison
• Advanced features

Summary

Based on our tests, there are three key takeaways from this shootout:

• The Axis Q3517 performed best in all scenes tested, included more advanced features than others, and consumed less bandwidth, but was most expensive by several hundred dollars
• The Hanwha XNV-8080R was solid, but lower performing than Axis in low light and WDR, but at a much more reasonable price.
• The Dahua N52BM3Z performed poorly in low light, with the shortest specified and actual IR range, but performed well in WDR scenes tested, and was drastically less expensive than other models tested.
• Finally, the Hikvision 4565 performed only slightly better than the Dahua camera in low light (IR and color mode) and performed worst in both WDR scenes due to its lack of true WDR (found in other cameras tested)..

Note that resolution varied in cameras tested, with manufacturers adopting different 5-6MP resolutions in their corresponding models:

• Axis Q3517-LVE: 5MP 16:9, 3072x1728
• Dahua N52BM3Z: 5MP 4:3, 2592x1944
• Hanwha XNV-8080R: 5MP 4:3, 2592x1944
• Hikvision DS-2CD4565F-IZH: 6MP (3:2), 3072x2048

Horizontal field of view width was matched for testing, to show differences in performance across the same field of view, including differing PPF due to these imager differences.

Vs. Avigilon, Bosch

Note that Avigilon's H4 series 5MP and Bosch's 5MP starlight were not included in this test, as both are 2-3 years old as of this test. We will test any new generation 5MP models claiming improved low light, WDR, or IR performance as they are released.

Price Comparison

Pricing of cameras in this test varied widely, from a high of ~$1,200 USD (Axis Q3517-LVE) to a low of ~$300 (Dahua N52BM3Z). However, Dahua and Hikvision lacked advanced features found in the Axis and Hanwha cameras, such as digital image stabilization, leveling assist, shock detection, or audio analytics, and the Hikvision 4565 included only digital WDR.

• Axis Q3517-LVE: ~$1,200 USD online
• Dahua N52BM3Z: ~$300 online
• Hanwha XNV-8080R: ~$800 online
• Hikvision DS-2CD4565F-IZH: ~$700 online

IR Performance and Range

In low light with IR on (~0.12lx and below), the Axis Q3517-LVE provides much better detail than any other camera in this test, with clearer subject details and text and an overall brighter image. The Hanwha XNV-8080R provides some usable facial details of the subject and legibility near that of the Axis camera, while only rough details and limited text are visible in the Dahua and Hikvision cameras.

At longer distance, the Axis camera again provides clearer images, with the subject difficult to see on other cameras, especially the Dahua N52BM3Z.

Axis Most Even IR Coverage, Others Dim At Edges

The Axis Q3517-LVE provided the most even IR coverage of test scenes, with a slight decrease in details at the edge of the field of view compared to the center.

However, the subject was very dimly illuminated at the edges of the Dahua, Hanwha, and Hikvision models, and difficult to see, shown below.

Color Low Light Performance

Testing color low light performance (~1-4lx) outdoors, the Q3517-LVE and XNV-8080R perform similarly, with overexposure present in both and similar subject details. However, as in the IR low light tests, the Dahua and Hikvision models perform worst, with limited subject details and almost total overexposure of the test chart.

Results were similar at other ranges, as well, shown below at 60' distance, with the Axis and Hanwha cameras again best.

Exterior Door WDR Performance

We tested WDR performance starting at an exit door scene with extreme variance (~45lx inside compared to ~9,000lx outside), with the cameras forced to adjust to rapid change in light.

In this scene, the Axis Q3517-LVE most clearly displays the subject at all points, with clear images of the subject and background as he first opens the door (below). The Dahua N52BM3Z provides details at this point, as well, but both Hanwha and Hikvision overexpose his face and the background. Note that the Hikvision 4565 is not a true WDR camera, using digital WDR only, while all others use multiple exposures.

Once inside the door, the Q3517 and Dahua models provide better facial details than others.

Warehouse Door WDR Performance

We also tested WDR performance in a less challenging scene, a warehouse with open overhead door, varying from ~90lx inside to 12,000lx outside.

In this scene, the Axis and Dahua cameras provide the best details of the subject, with Hanwha close, but slightly less detailed. The digital WDR Hikvision camera again performs worst.

Full Light

In a well lit outdoor scene, the cameras provide roughly similar subject details at short range (~50-60PPF), with the Hikvision 4565 displaying slightly reduced detail on the test chart.

Relative performance was similar at longer ranges, with all cameras displaying similar details.

Axis Bigger Than Average/Dahua Smaller Than Average

Of cameras tested, the Axis Q3517 was the largest, 1-2" larger than the Hanwha and Hikvision models, typical size for outdoor domes. By contrast, the Dahua N52BM3Z was much smaller than average, closer to indoor minidome size. The four cameras are shown side by side below:

Physical / Installation Differences

Aside from size, physical features of the tested domes were similar, with these key differences:

• Axis/Hanwha box mounting: Both Axis and Hanwha include integrated holes in the dome house for mounting to standard electrical boxes, e.g., single, double, octagon, etc., shown below in the Axis Q35. Box mounting requires additional parts when using Dahua and Hikvision.

• Hanwha difficult gimbal: The gimbal of the Hanwha XNV-8080R was difficult to adjust for level, requiring users to adjust it using a small ring on the back of the gimbal, instead of the front as was typical in other models.

• Dahua no I/O or audio: Finally, the Dahua N52BM3Z did not include I/O or audio, while other models all included both.

Axis/Hanwha Advanced Features / Dahua/Hikvision Basic

Additionally, the Dahua and Hikvision cameras lacked advanced features found in the Axis and Hanwha models, such as electronic image stabilization, leveling assist, shock detection, or audio analytics. See our tests of the Q3517 and XNV-8080R for details on operation of these features.

Note that all models include some form of analytics, generally intrusion and crossline at a minimum. See individual test reports for them: Axis VMD4 Analytics Tested, Dahua Intrusion Analytics And VMD Tested (Poorly), Hanwha Wisenet X Analytics and VMD Test and Hikvision VMD And Intrusion Analytics Tested

H.265 Support

Of cameras tested, only the Dahua and Hanwha models support H.265, with Genetec and Milestone supporting these streams for both. Exacq and Network Optix (and Wave/Spectrum) also supported the Hanwha camera's H.265 stream, but not Dahua.

Axis Lowest Bandwidth

The Axis Q3517-LVE had the lowest bitrates of cameras tested in all scenes by a notable margin, lower than, less than half the bitrate of Hikvision H.264 (next closest) in full light and 100-200 Kb/s lower than Dahua and Hanwha's H.265 streams in low light. Note that all cameras increased in low light except the Dahua N52BM3Z, which decreased due to its dark, unusable images with IR on.

Firmware

The following firmware versions were used for this test:

• Axis Q3517-LVE: 7.15.3.1
• Dahua N52BM3Z: 2.460.0000.15.R build date 2017-09-07
• Hanwha XNV-8080R:1.11_171129
• Hikvision DS-2CD4565-IZH: 5.4.41

Test Parameters

The following adjustments were made to cameras in this test:

• Cameras were all set to 1/30s shutter or faster. None were allowed to use slow shutter.
• Cameras were all set to max resolution, 10 FPS.
• Compression was standardized to quantization of 28-30 (prior to activating smart codec dynamic compression).

3D DNR

Netvision kameralar, geleneksel kameralara kıyasla, düşük ışıklı gözetim sahnelerinde daha az gürültülü görüntü sağlamak için 3D dijital gürültü azaltmayı benimsiyor. 3D DNR görüntü kalitesini artırmak ve bant genişliğini korumak için kullanılabilir.

AWB Function (Automatic White Balance) -AWB Fonksiyonu (Otomatik Beyaz Dengesi)

Bu özellik, kamera görüntüsünün renk sıcaklığını, mevcut ışık türüne uygun olacak şekilde otomatik olarak ayarlar, böylece beyaz ve diğer renkler mümkün olduğunca doğal görünür.

AE Function (Automatic Exposure) - AE İşlevi (Otomatik Pozlama)

Düşük ışık koşullarında daha iyi performans için AE (Otomatik Pozlama) ışık seviyesini otomatik olarak algılar ve bu mod etkinleştirildiğinde net bir görüntüyü korur.

ABF

ABF (Auto Back Focus) teknolojisi, Netvision kutu kameralarının en uygun odaklamayı elde etmek için görüntü sensörünün konumunu ayarlamasına olanak tanır. Bu özelliğe Web istemcisi üzerinden de erişilebilir.

AGC Function (Automatic Gain Control) -AGC Fonksiyonu (Otomatik Kazanç Kontrolü)

Düşük ışık koşullarında daha iyi performans için AGC (Otomatik Kazanç Kontrolü) standart 16db'den 26db'ye çıkarılabilir. Bu, görüntüyü daha parlak hale getirme etkisine sahiptir (ancak, video sinyalinin tüm yönlerini güçlendirdiği için resme daha fazla gürültü de ekleyebilir).

ANR

ANR (Otomatik Ağ Yenileme) işlevine sahip NVR'ler (Ağ Video Kayıt Cihazları), ağ bağlantısı kesildiğinde IPC (İnternet Protokolü Kamera) depolama kartına video verilerini otomatik olarak kaydedebilir. Ağın kurtarılmasından sonra, NVR, kamerada depolanan video verilerini otomatik olarak alır.

Video Loss Alarm-Video Kaybı Alarmı

Kamera görüntüleri kesildiğinde Kayıt cihazlarının Uyarı alarmı vermesi

Ses Kaybı Tespiti

Ses Kaybı Tespiti, Netvision’un Akıllı Özellikler setindeki istisna algılamalarından biridir. Bu işlev etkinleştirildiğinde, ses kaybı olduğunda alarm eylemleri tetiklenir.

BLC

BLC (Arka Işık Telafisi), genel video dizisinin parlaklığını korurken, arkadan aydınlatılan bir ortamda yakalanan videonun parlaklığını telafi eder. Basitçe ifade edersek, BLC karanlık görünen nesnelerin bir pencere veya girişin önündeki gibi çok parlak bir arka plana karşı görünür olmasını sağlar. Arka planda genellikle fazla pozlanmış olduğundan, BLC genellikle videodaki belirli bir bölge için etkilidir.

DCIF

Çift Ortak Orta Format, çözünürlüğü 528 x 384 piksel (PAL) veya 528 x 320 piksel (NTSC) olan renkli görüntü formatı

Defocus Detection-Odak Algılama

Net algılama, Netvision’un Akıllı Özellikler setindeki istisna algılamalarından biridir. Bu işlev etkinleştirildiğinde, kamera odak dışında olduğunda alarm eylemleri tetiklenir.

Defog-Buğu Giderici

Duman, toz, sis, vb. Görüntüleme özelliklerini modelleyerek, defog teknolojisi, doğru ve doğal bir video elde etmek için ayrıntıları ve rengi etkili bir şekilde geri yükler. Defog teknolojisi, yağmur, sis veya sis gibi kötü hava koşullarında çekilen görüntülerde netliğin korunmasına yardımcı olur.

Digital Watermark-Dijital filigran

Dijital filigran teknolojisi, cihaz bilgilerini kaydedilen videoya gömer. Dijital filigranlar, videonun gerçekliğini veya bütünlüğünü doğrulamak veya sahiplerinin kimliğini göstermek için kullanılabilir.

DIS

DIS (Dijital Görüntü Sistemi) kameralar, Netvision tarafından geliştirilen yeni bir giriş seviyesi ürün serisidir. Mükemmel görüntü kalitesi, düşük güç tüketimi ve yüksek güvenilirlik ile DIS kameralar, geleneksel analog kameralara mükemmel bir maliyet-etkin alternatif sağlayabilir.

Dual Steam-Çift Akış

Video kodlayıcıdan geçen bir video görüntüsü kanalı anlamına gelir ve 2 bağımsız bit akışını çıkarır.

Triple Stream-Üçlü Akış

Video kodlayıcıdan geçen bir video görüntüsü kanalı anlamına gelir ve 3 bağımsız bit akışını çıkarır.

Çözünürlük, kare hızı, bit hızı ve çıkış bit akımının diğer parametreleri bağımsız olarak ayarlanabilir. Çıkış çift buharı, örneğin sabit disk depolama ve diğeri ağ iletimi için farklı talepleri karşılayabilir.

Dynamic Adjustment of Encoding Parameters-Kodlama Parametrelerinin Dinamik Ayarı

Kullanıcı tarafından ayarlanan kodlama parametreleri, ağ aktarımının ve kaydetmenin duraklatılması veya yeniden başlatılmadan tek seferde etkili olabilmektedir.Gözetleme sisteminde, statik izleme sahnesi için görüntü çözünürlüğü, görüntü kalitesi, bit hızı ve kare hızı azaltarak düşük bit hızında kaydedilebilirken, görüntü sahnesinin değiştirilmesi, daha yüksek çözünürlük, bit hızı ve video karesi oranı vb. Gerektirir. yüksek kaliteli video akışı elde edin. Yukarıdaki parametreler dinamik olarak değiştirilebildiğinden, dosyaları sık sık değiştirmeden sürekli görüntüler korunabilir. Ve sadece kritik anlarda yüksek kaliteli görüntü gereksinimini karşılamakla kalmaz, aynı zamanda disk alanını ve ağ bant genişliğini de korur.

EIS

Hafif titreşimlere sahip (örneğin, güçlü rüzgarlardaki bir elektrik direği) koşullarda, titreşim nedeniyle videolar bulanık görünecektir. EIS (Elektronik Görüntü Sabitleme), bir videodaki titreşimin etkilerini azaltmaya yardımcı olabilir.

Face Detection-Yüz tanıma

Yüz Algılama, Netvision’un Akıllı Özellikler kümesindeki algılama özelliklerinden biridir. Netvision yüz algılama teknolojisi ile, 4 hatlı bir ağ kamerası insan yüzlerini doğru bir şekilde algılayabilir, yüz görüntülerini yakalayabilir veya bir alarm tetikleyebilir.

POE-Power over Ethernet (PoE)

Her cihazın çalışması için güç kabloları yerine gücün (DC elektrik akımının) veri kabloları tarafından taşınması için gerekli elektrik akımını sağlayan kablolu Ethernet yerel alan ağları (LAN) için bir teknolojidir. Bunu yapmak, ağı kurmak için tahsis edilmesi gereken kablo sayısını en aza indirir.

Aşağıdaki Makale aklınızdaki tüm sorunların çözümü için oldukça iyi hazırlanmış bilimsel test verilerine dayanan bir yazıdır.

TABLE OF CONTENTS

Welcome! 

Overview 2

Pixels Determine Potential, Not Quality 6

Resolution 10

Frame Rate 21

Bandwidth 27

Lux Rating / Minimum Illumination 44

Surveillance Camera Imagers 54

Wide Dynamic Range 61

HD Analog vs IP 73

Network Security 83

Devamını oku: IP Kamera mı HD Kamera mı seçmeliyiz?

Ayrıntılar

Görüntüleme: 4190

! Resme sağ klikleyerek yeni pencereden açarsanız tam ve büyük olarak görüp inceleyebilirsiniz.

Aşağıdaki Video da NetVISION Kamerların çiplerine sahip (SONY IMX323) ile

Diğer markaların taşıdığı SC çiplerine ait görüntü örneklerinin kıyaslandığı videoyu 

izlediğinizde kalite farkını açıkça göreceksiniz.

Shootout: Megapixel vs Analog Cameras

Author: Ethan Ace, Published on Mar 12, 2014 |  Email This

How much does resolution really make a difference? For those purchasing budget or entry level systems, what, if any gain, does one get for higher resolution?

In this test report, we did head to head testing of:

• 450TVL

• 600TVL

• 700TVL

• 960H

• 720p

• 1080p

We bought Q-See equipment off Amazon to simulate the experience / products many entry level systems use.

Preview

Questions Answered

The test report answers:

• What is the image quality difference between 450TVL and 700TVL cameras? Day and night?

• What is the image quality difference between 700TVL and 960H cameras? Day and night?

• What difference is there between the 'best' analog offering and HD cameras? Day and night?

• If you put an HD camera at double the FOV width of the 'best' analog camera, who will win?

• What benefits does the wider FoV of 960H cameras offer?

• What impact does recorder / encoder have on 960H camera quality?

Analog Camera Comparisons

For reference, this image shows the approximate 18' FOV of all cameras.

We began by comparing analog cameras at three TVL counts/resolutions to see what differences, if any, were present.

450 TVL vs. 700 TVL Analog Cameras

Starting with 450 TVL vs. 700 TVL, we can see that performance is close, with no real gains in the higher TVL camera. Some letters on the eye chart are more legible in the 700 TVL camera, though it begins to wash out earlier than the 450 TVL camera, negating this benefit.

At night, with IR on, the 700 TVL camera produces marginally better details of our subject, with better contrast on the test chart.

700 TVL vs. 960H Analog Camera

Moving up, we tested the 700 TVL camera against a 960H model, both captured at D1 resolution. The gains in the 960H camera are noticeable, with letters more legible, as far as line 5 vs. only line 3-4 in the 700 TVL model. Our subject's face is moderately clearer, as well, with slightly more detail of his features.

In low light with IR on, the 960H camera again provides better details with more visibility of both the test subject and chart.

600 TVL Test

We compared a 600 TVL analog camera (the Q-See QM6006B) to the 700 TVL and 960H analog cameras, seen in the comparison below. The 600 TVL analog camera is able to produce more detail in both our subjects face and test chart than the 700 TVL camera, looking sharper overall. Performance relative to the 960H camera is close, though line 5 of the test chart is partly legible in the 960H model, while some characters in line 4 in the 600 TVL cameras are difficult to discern.

Analog vs. HD

Next, we shot out the 960H camera, the top analog performer, against 720p and 1080p HD IP cameras in order to show the differences between these two technologies. The IP cameras easily deliver more details than 960H, with more lines legible on the test chart, and much better details of our subject's face.

The same is true in low light with IR on, with both HD cameras providing more detail:

960H vs. Wide Angle 1080p

In order to see if 960H could compete with HD at any field of view, we widened the 1080p camera's field of view to double that of the 960H camera. This comparison shows the relative field of view of each, as well as a zoom view of our subject. Even at a FOV this wide, 1080p still beats out the analog camera, with better details of subject and chart.

960H Field of View

Manufacturers regularly claim 960H cameras have wider fields of view than D1. However, we found that 960H simply stretched 4:3 video to widescreen (using a 2:1 aspect ratio, not 16:9 as some claim). This resulted in substantial distortion, as with objects appearing squat and wide, as seen in this image:

Zooming in however, we can see that this "additional" resolution offers no increase in detail, with no more lines visible in the 960H image than in D1. Some characters actually become more difficult to read due to distortion:

960H vs. D1 Encoding

Though the increase in pixel count with 960H offers no benefit, we found a visible increase in detail when connecting the QM9702B to a 960H-rated DVR, instead of D1 DVRs/encoders. This comparison shows the same camera, the 960H QM9702B, first connected to the 960H DVR, the QC524, then the D1 QT534. Notably, lines 5/6 are legible in the 960H DVR vs. 4/5 using the D1 model.

Overall Resolution Comparisons

For those who wish to see all five cameras side by side, we've included the following comparisons, in full light:

And low light:

Methodology

All cameras were tested using default settings.

These are the camera models used in this test:

• Q-See QD4501B 450 TVL analog bullet

• Q-See QM6006B 600 TVL analog bullet

• Q-See QM7008B 700 TVL analog bullet

• Q-See QM9702B 960H analog bullet

• Q-See QCN7001B 720p IP bullet

• Avigilon 2.0W-H3-B01 1080p IP bullet camera

DVRs used:

• QC524 4-channel 960H DVR

• QT534 4-channel D1 DVR