teemto

Hello everybody! I just got a nice small Hik DS-2CD2032-I 3Mpix bullet camera on my bench. The camera itself is very nice and performing more or less as expected. But..... Are You guys sure, that there is true 3Mpix sensor inside? See the attached picture. The upper screenshot is taken with max 2048x1536 3Mpix resolution. The lower one is FullHD 1920x1080 2Mpix. Now please have look to the flower on the right side. On the lower picture - which is 1920 pixels wide You can see whole flower and almost all the table. So on the upper 3Mpix picture, 2048 pixels wide (it is 128 pixels more) I expected to see even more of the table, and of course the flower. And what You see on the upper picture: only half of the flower. The angle of view is smaller, than expected. Now see the frames on the lower pic. The blue one represents the expected 2048x1536 field of view. The red one is the real field of view (in 3Mpix mode), and it is a very close approach to a 1600x1200 resolution. It seems to me, that the 3 Mpix video stream from this camera is an software upscaled 2Mpix 1600x1200. So - is the true resolution of the sensor really 3Mpix? What do You think?

I have the answer from the distributor. They say, that the sensor installed in the DS-2CD2032-I 3 megapixel camera is the Aptina AR0330 2304x1536, 1/3", 5.07mm(H)x3.38mm(V). The 3Mpix 4:3 stream uses physical 2048x1536 pixels (2048 out of 2304 horizontal). The 2Mpix 16:9 uses physical 2304x1296 (scaled 20% down to 1920x1080). So according to the official info it is the 3,5 Mpix camera. I think, I have to find this lost-somewhere-test-chart and try to verify this, although the results may be not clear - the camera has very simple, small lens and this affects high resolutions in siginificant way.

You are absolutely right. But it was not the subject of my small research. To be precise - the camera itself is not bad. It has very good price/quality factor. And the only reason for me to look for the real data of the inside electronics is that 1.I like to be precise when offering something to my customers. 2.It is always better to know what's under the hood....

MaxIcon - You did a great job. I was just looking around to find our lost-somewhere-test-chart and perform some visual tests on the camera, but You did it before and Your results are exactly as I expected. So it seems, I'm not the only one who says "there is no spoon" when talking about real 3Mpix in this camera. Thank You for help and confirmation of what I suspected. PS I sent an inquiry to Hik asking for a specification of the sensor....