* * * characteristics of non-projection visual materials are as follows

The same feature of non-projection visual materials is low cost.

Non-projection visual media, also known as traditional teaching media, includes printed matter, pictures, graphic materials, models and objects. Projection visual media includes slide projector, projector and corresponding teaching software.

Projection visual media consists of two parts.

Hardware and software. Hardware refers to various teaching machines related to the transmission of educational information, such as slide projectors, projectors, physical projectors, digital projectors, computers and so on. Software is slides, slides, computer courseware, etc. Has carried teaching information.

digital camera

Digital camera is the core of digital image technology. In recent years, with the development and popularization of e-mail and WWW, as well as the improvement of digital camera technology and the decline of price, digital cameras have gradually become a hot spot in consumer electronic products. Digital images (especially in the low-end market) used to rely on scanners and traditional film processing. For most people,

Digital image processing is a painful job. First of all, we should shoot, develop and check the developed photos (it often takes many times to get satisfactory photos), scan the photos to generate images that can be used by computers, and finally edit the images until we get satisfactory images.

With a digital camera, everything becomes much simpler. You can shoot at will according to your own requirements, and then download the image directly to the PC for editing. With a digital camera, there is no need for film and development.

With it, you can easily and quickly generate images for computer processing. Now, digital camera has become an indispensable tool in digital image processing.

The so-called digital camera is a special camera that can shoot and convert the shot scene into an image stored in digital format through internal processing. Different from ordinary cameras, digital cameras do not use film, but use fixed or detachable semiconductor memory to save the collected images.

A digital camera can be directly connected to a computer, TV or printer. Under some conditions, digital cameras can also be directly connected to mobile phones or handheld computers. Because the image is processed internally, users can immediately check whether the image is correct, and can immediately print it out or send it by email.