WebEye E10/E104
WebEye E10/E104
User’s Guide
58
(Appendix 3)
Frequently Asked Questions
1. About WebEye's Feature
•
Q: What is WebEye?
A: The WebEye is a flash memory, and many other features. No other hardware is cameratype
server with an integrated Internet server, image compression device, built in CCD, necessary
for use. The WebEye connects directly to a network and provides real time images over
networks and the Internet. Simply provide power and connect LAN cable to the WebEye.
•
Q: What preparations are needed to install?
A: Provide power and connect network cable. Insert the WebEyeSetup disk, drag the WebEye
Setup icon from the pop-up window onto the desktop, double-click the icon.
•
Q: Which algorithm is used to compress digital images?
A: WebEye utilizes the Wavelet image compression device and the Linux operating system.
Wavelet and Linux enable WebEye to transfer high quality images faster and with a greater
degree of reliability than standard JPEG systems.
•
Q: What is the difference between Wavelet algorithm and JPEG in compressing digital images?
A: Wavelet is more efficient than JPEG by 30-300%. The higher efficiency of Wavelet comes
from its encoding method. Wavelet uses the DWT (Discrete Wavelet Transform) algorithm,
while JPEG uses DCT (Discrete Cosine Transform). Due to its efficiency, Wavelet will be
adopted as the standard in digital image compressing with the introduction of JPEG2000.
Since Wavelet is not yet standardized, it requires the installation of a Plug- in or
Active-Xcontrol for standard Web browsers such as Netscape and IE- Explore. The size of
the Plug-in or Active-X control is 3 MB. 3MB needs quite a long time to download, so
Wavelet is not widely used. However, Web Gate Inc. has developed a Plug-in/Active-X
control of 300KB for faster, more efficient download time.
•
Q: Can WebEye support more than one user with different resolutions at the same time?
A: WebEye can support up to 100 users with different resolutions at the same time.Moreover,
WebEye has progressive mode and gray mode to support low speed network line users. A
user can monitor full resolution (720 X 486) color images while another user sees half
resolution (360 X 243) B/W images.
•
Q: What is maximum transmission speed?
A: WebEye compresses and transmits 30 frames per second (fps) on 10 base-T Network.
However this speed is not equal for every user because transmission speed depends on the
performance of individual PCs and network bandwidth. 30 fps refers to the user-end or
receiving side of the transmission. WebEye can send more than 30 fps total to several users.
For example, if 5 users are receiving 10 fps, WebEye is sending 50 fps. When WebEye is
connected to a 10 base-T network, it can transmit up to 123 fps of 3KB image files.
