Low Light Technology - Samsung Techwin SSNR

Visual Tools Report on SHC-730

The aim of this report is to analyse the data obtained during tests of data size of recorded images captured on cameras connected to a VS-DVR digital recorder.

Tests: environment

For these tests we used a Videosafe VS-DVR-416 recorder, one Samsung SHC-730PH camera and one high-resolution camera of other manufacturer.

Testing conditions were the same for both cameras: same location, same lighting conditions and optics. Due to light entrance through the windows, daylight conditions were changing during the day.

The Videosafe VS-DVR-416 recorder is configured 24 hours time-lapse recording at 8 frames/second for both cameras.

SSNR (Samsung Super Noise Reduction electronic filter) feature is activated on Samsung camera, any screen noise or ghost effects commonly associated with nighttime surveillance are effectively removed for easier image reading, and space usage for image storage can be reduced by up to 70 percent with the same image quality.

Tests: results

After testing we noted the number of files and space usage for each camera with the following results:

Test nº 1

Camera	Disk usage (in megabytes)	Disk usage (number of video sequences)
Samsung SHC-730PH	5.548	1.210
High resolution 480 Tvl	11.127	2.380

Test nº 2

Light conditions were kept constant all day with low level of artificial lighting.

Camera	Disk usage (in megabytes)	Disk usage (number of video sequences)
Samsung SHC-730PH	5.319	1.159
High resolution 480 Tvl	8.819	1.891

Test nº 3

The results of this test have been divided into 3 parts, each part contains 8 hours, from 00:00 AM to 08:00 AM, from 08:01 AM to 16:00 PM and from 16:01 PM to 23:59 PM, indicating the disk usage and the percentage in one day on each part. We obtained the following results:

Camera	Part	Disk usage (in megabytes)	Disk usage (number of sequences)	1 day percentage
Samsung SHC-730PH	00:00-08:00	1.767	385	33
	08:01-16:00	1.747	381	33
	16:01-23:59	1.742	386	33
	Total	5.277	1.152
High-resolution 480 lines	00:00-08:00	3.307	708	38
	08:01-16:00	2.376	512	27
	16:01-23:59	2.991	644	35
	Total	8.676	1.864

Data analysis

After evaluation of data obtained from different tests, the main conclusions are the following:

Test 1

One day recording with Samsung SHC-730PH camera occupies 50% less space than high-resolution 480 lines camera, saving hard disk space. Since the images occupy less space, data transmission will be more effective and the recorder can transmit more images in the same time period.

Test 2

There is not such a disk usage difference because of artificial low lighting during the day, even though the differences are 40%.

Test 3

Hard disk space usage is measured in three parts to differenciate natural lighting (part 2) from artificial lighting (parts 1 and 3).

The differences in each part are the followings: 53, 26, 42 (39)

Part 1: Samsung SHC-730PH camera occupies 53% less than high-resolution camera 480 Tvl.

Conclusions

After data analysis in low artificial or natural lighting conditions the images obtained with Samsung SHC-730PH camera occupy between 42% and 53% less than the ones obtained with high-resolution camera 480 lines.

Besides having far more hard disk space, we have also the benefit of optimizing the transmission of images obtained with Samsung SHC-730PH camera against of high-resolution 480 lines camera.

Finally, we have to emphasize that the image quality of Samsung SHC-730PH camera is clearly better than high-resolution 480 lines camera. Further evidence to corroborate these conclusions are the photos below recorded with the different cameras at different times of the day.

Attachment 1 – Images obtained from Videosafe VS-DVR-416 recorder

High-resolution 480 lines camera, 12:30 AM, artificial low lighting, natural high lighting

Samsung SHC-730PH camera, 12:30 AM, artificial low lighting, natural high lighting

High-resolution 480 lines camera, 00:30 AM, artificial low lighting, no natural lighting

Samsung SHC-730PH camera, 00:30 AM, artificial low lighting, no natural lighting