Camera Cell Phones. Lecture structure:. Historical review. How do camera phones work. Characteristics of Existing models. Usage statistics and forecasts. Limitations Main applications. What can be expected in the near future. Introduction:.
Camera phones are considered as the latest “killer application” in the field of mobile phones.
Perceived as a real revolutionary device.
Predicted to be the most popular consumer device in history.
8 time digital zoom
16MB of memory
110,000-pixel CMOS image sensor
Lets look at the specs:
We can divide the evolution of the camera phones to four major stages:
This stage includes the first ever camera phones.
Still sold today mainly in Europe.
A good example for these camera phones is the Sony Ericsson's S700i.
1.3 MP camera (1280 x 960)
Video recording, 32 MB memory
Color LCD 260K, 8X Digital zoom
The Pixel count is not the only thing that influences the quality of the picture (there is also the sharpness of the lens, the kind of the chip etc.).
Different 1 MP devices yield pictures of different quality.
A comparison between three 1 MP camera-phones:
color reproduction :
contrast is too high
In this side
Blurry in the
The purple color effect
The previous example demonstrates a few problems with the camera-phones.
These devices use higher quality image sensor that can produce images of up to 1600 by 1200 pixels.
Some of the camera-like capabilities of the 2 MP camera-phones includes:
include auto focus, a digital 10X zoom, digital movie function, and a number of picture taking modes, such as "close-up," "evening," or "portrait “.
Let’s see an example: SAMSUNG's 5 MP camera-phone:
5 resolution options
3 compression types
respond to 70% of the incident light
The charge-coupled device(CCD) sensor:
CMOS sensor are used much more in camera phones then the CCD for the two following reasons:
Their disadvantages :
Influences and Applications
For example, the camera is used to scan bar codes and triggers a download of coupons, (by ‘Scanbuy’ company).
Facial recognition softwares:
includes 2GB of data(200K images) with names, crime history etc. It can be updated with a network data base.
Tag-reader running on
a camera phone
Getting server configuration
SpotCode reader runs, performing real-time
video image processing to detect SpotCodes.
Active visual tags generated dynamically from a PC display
(developed by High EnergyMagic company)
the computer runs applications, and the phone becomes a
universal pointing device, personal display and keyboard
The data encoded in the tag, together with the tag's position
and size is transmitted via Bluetooth to a nearby computer.
Apart from the obvious advantages due to the fact that they are small and easily carried :
There are also downsides of the expanding usages of camera-phones:
Despite the big amount of power that is packed in these devices, the mobile experience is as good as the software that controls them.
The more sophisticated they are, the more likely they are to contain software bugs.
Two examples for that:
2/3 of all mobile phone sold
Will include camera.
Eight times more camera-phones sold than film and
digital cameras combined
It is estimated that the multimedia services (like MMS) will play a major role in expanding the usage of these devices, alongside with the reduction of the phone price.