With the arrival of the new generation Dahua HDCVI took advantage to take a "test drive" of three of the top selling models, thus removing a bit of doubt on the many questions that every day happen to hear us by customers.
First of all, what do we mean? IP Cameras 2 Megapixel Full HD 1080P (1920X1080) at 25fps, are absolutely one of the most popular models on the market along with the analog 960p, guarantee excellent vision of objects at distances also important with high details. The cameras try in this article are similar to each other that allows easy comparison and a correct evaluation of the same.
Dahua HFW3200S, 2MP, Chipset Sony Exmor, 25fps a 1080p, 3.6mm, PoE IR*
Dahua HFW4200S, 2MP, Chipset Sony Exmor + Ambarella a 1080p, 3.6mm, PoE IR*
PoE IR* means plug-cameras directly from the network cable (PoE using specific), is an extremely useful and important aspect switch, allowing wiring decidedly less complex, as you just roll out a common CAT5E or CAT6 network cable to power the camera.
On paper are very similar products, but the issues to be considered on cameras of this type are manifold being strongly influenced by the quality of the lenses, the firmware, the specifications of the components supplied with the chipset, the reliability of the product, not least the compatibility with the native protocols, vital aspect to ensure it works with recording systems.
Box and aesthetics are equivalent, absolutely identical to Dahua slightly smaller than the Setik, all IP66 and feature arm for fixing, all inclusive of Reset or cable or camera, indispensable feature if you do not want to get into configuration or more abruptly removed and replace the power supply.
The test will be carried out by evaluating the performance in terms of image and NOT functions provided by the camera, are still all have a manual in Italian, Menu in Italian, save to FTP, and Mail supports RTSP string, so in fact from this point of view there are no differences to report except a different menu and a different way of managing image settings.
We're talking cameras with the same chipset, so Sony Exmor CMOS, although on HFW4200S a new generation DSP is mounted (Ambarella). On all this is an important native compatibility with Onvif 2.0, and therefore with all the NVR that support this version Onvif (including Dahua and Setik).
At the moment there are many products in terms of chipset megapixels, but it is the best compromise on the market by far Sony Exmor because, at low cost allows for optimal image rendering, remember that the megapixel resolutions than analog versions today require an amount of light high and consequently have many difficulties in all those critical or abnormal conditions, in particular at night, and the movement of non-homogeneous lighting conditions. Sony Exmor CMOS chipset is one of the few able to give excellent results in these conditions, as we shall see later.
In this case we talk about all of Sony Exmor CMOS 1/3 ", it is not my intention here to delve too technicalities of product, however we speak of products with a well-engineered circuitry, and adequate capabilities in critical conditions of use, the declared -20 ° / + 60 ° are absolutely true and is not a marginal issue, since especially in Italy are conditions that may be encountered in special environments.
The product used to test the cameras has been the NVR 5208 of Dahua, latest generation currently available which allows us to also know precisely the bandwidth developed by the individual cameras, indispensable for the purpose of this test.
All images shown here were made by exporting in "non-destructive" so as to give a yield the most realistic possible, otherwise if we had exported all in .jpg, by its nature the image is not equivalent to the original.
The first test was done with all cameras at most of the Band (8 Mbps), in this condition we are going to understand the performance of individual cameras, without assessing the influence of the new DSP, DSP for the uninitiated is the component the cameras making the image compression is his responsibility to give the best compromise between image quality and bandwidth available, there is no doubt how important his work, so the choice today of Dahua to switch to Ambarella, specialized company in the development of DSP professionally.
Let's start with the camera HFW3200S, here it is clear the CMOS output, and the quality of detail is remarkable, the effects of compression are minimal giving an appearance very similar to the images NOT tablets, it is excellent also the yield in the presence of artificial light (Neon) usually very critical for IP cameras. Lower noise and minimal loss of detail as you can see from the second picture that is a detail. Excellent color rendition even with strong contrasts and with white.
Finally HFW4200S, the latest of Dahua home, has a sharpness of images without equal, and a yield on really realistic colors (note the white than previous), also even on the detail was definitely improved the compression protocol used, also thanks to the chipset "Ambarella", I consider that the lens is of higher quality than the previous one, it will be highlighted further in the images at night, but the stability and overall quality is a step ahead of the sister.
ASSESSMENT
They start with GWSECU Camera (
www.gwsecu.com) GW-HW10AC80S-CVI, here is a clear CMOS yield, and quality of detail is remarkable, the effects of compression are minimal giving an appearance very similar to the images NOT tablets, it is excellent also the yield in the presence of artificial light (Neon) usually very critical for IP cameras. Lower noise and minimal loss of detail as you can see from the second picture that is a detail. Excellent color rendition even with strong contrasts and with white.
