We converted an ordinary projector screen into an low cost interactive screen using a webcam. This is one of the several applications from our "Interactive Computer Interface using Webcam" proejct. Here's some of the demos used during our project presentation to illustrate our prototype. The projector and screen are ordinary ones like any others in our labs. A webcam is used to detect the presence of any lightspot on the projector screen. A program running on the computer then finds out the position of the lightspot on the screen and uses this info to control the computer's mouse cursor. As shown in the video, our prototype is able to work with the following light pointers: 1. any ordinary laser pointer (ie red light spot) 2. an ordinary pocket torchlight (penlight) 3. specially built infrared lightpen 4. infrared presentation pointer/stick. Our prototype is able to operate most (not all!) standard WinXP applications a nd several video games (more info on other videos). This is demo video#3 for the "Interactive Computer Interface using Webcam" project by our Audio-Visual Project lab, Elect. Eng. Div, Ngee Ann Polytechnic, Singapore. More info on projects-justforfun.blogspot.com lohchinfei
bestcomputersprices.blogspot.com Interactive Projector Screen: Low-Cost Webcam Implementation
A San Francisco jury ruled today that Toshiba is guilty of a price-fixing scheme that included Samsung, Sharp, Hitachi Displays, LG and several other manufacturers/marketers of LCD panels, including TVs and computer displays. The class-action lawsuit ... Toshiba Found Guilty in LCD Price-Fixing Scheme
Some of the many ways that someone can use to give appeal to the information they want to pass to their target audience is by using a computer projector. The use of this image presentation device can go a long way in ensuring that the host gets the kind of attention that they want from the audience. In addition, it lets them take charge of how they deliver the massage in terms of altering the audience emotions when they want to drive a point home.
The computer projector itself is a class of image device that beams wider mirror images, video and data from the gadget on white flat screens or surfaces. What makes the image presentation possible is the projector's lamp that produces the ray of light required for the image to be visible on the presentation surfaces. However, the brightness level that best suits a presentation will greatly depend on the size of space and intensity of light within the room. For dark spaces, computer projector lamps rated above 300 ANSI lumens is good enough but for well-lit medium space projector lamps with more than 750 ANSI lumens rating provides excellent viewing and note taking during presentations. However, the current breed of projector with the liquid crystal display (LCD) technology has costly, short life but bright metal halide lamps with a light intensity of around two to four thousand ANSI lumens.
Another important factor that one needs to consider when selecting a computer projector is their resolution. This simply implies that individuals should select a computer projector that suits the image detail level of their presentation. For those with simple power point slide show legacy projectors with a low resolution of 640x480 pixels will do the job perfectly. However, if the presentation in have low-resolution images or animations the host presenter may need to upgrade their computer projector gear to 800x600 pixels to get quality staging. Furthermore, incase one wants their audience to hav e a good movie experience from the high-resolution video that they want to display a 1024x768 pixels computer projector will provide an excellent entertainment for viewers.
There are also a number of compelling reasons for presenters to consider using a computer projector instead of slide or overhead film projectors. Namely, they have professional looks, they display images, videos and data at the same cost, they are stylish and portable and they can present data and audio from the local or online network. What more, they are compatible with both analog and digital electronic media content. Besides this computer projectors also have some draw backs due to their rigid design specifications. For instance, if one wants to get the best out of a computer projector they use for presentation, they must to have specific type of connector to link their computer or media source to the projector. They perform poorly in terms of audio volume. Lastly, it is almost impossible to adj ust the sequence of image clips on the computer projector during presentation without messing around with the media source.
More Computer Projector - 2 IssuesQuestion by robel: What is the best computer projector for classroom use? Please consider quality and price since I will buying this on my own. Best answer for What is the best computer projector for classroom use?:
Answer by jardim_2000
The one that works and has a five-year-guarantee! Thing long term and the dynamics of your class. Anything class related is long term, and depending on the usage, even the best one in the market will not last long. Price is not the main issue here. Wherever you are, get some advice of the best brands, the ones that brake the least and has the best post-sales service. If you do that you minimize the probability for troubles.
0 comments:
Post a Comment