When the letter of video booth, physical booth

Product Specifications 1. 130W, 1/3 of the image sensor; 2. ≥850TV lines, 22x optical, 16x electronic zoom; 3. Function: color / monochrome, positive / negative, image, text / image, image freeze; 4. USB function enables to record, capture, annotation, control (optional); 5. lens vertically or horizontally 350 ° rotation; 6. sidelights bottom lights are environmentally friendly energy saving LED lights; 7. unique ESD Protection function; 8. External RGB input Road, Road RGB output, stereo audio input interface Road, all the way stereo audio output, one RS-232 computer control, one composite video output; 9. straight off; unique matrix output RGB * 2 ; 10 with an external 12V power supply safety extra-low voltage power supply; 11. with the screen contrast, comparison and storage of the machine 20 pictures individually; 12. OSD menu display, containing preset mode, color adjustment, resolution adjustment, etc. function; 13. dustproof and waterproof mirror brushed panel; Video Showcase because of its easy to use features and versatility, multimedia teaching in the country has been more widely used, from the development trend of the past two years, the Each classroom a multimedia projector + a video Showcase model almost universally accepted mainstream configuration. However, in the usual procurement, since on the one hand the projector in the whole procurement funds heavily weighted share, on the other hand the lack of objective evaluation parameters or standard video Showcase performance, so often ignored concerns about video Showcase, make the wrong purchasing decisions. So, how to choose a good video Showcase is a cost-effective place in a subject before us. From the product's core components look Imaging Component CCD: CCD camera is one of the core components of the video booth, we determine the image quality of the merits; the world's CCD chip is mainly produced in Japan, and is recognized as the best quality; the same CCD sensor camera production costs accounted for a large part, what the CCD sensor performance as well as the cost structure of the product have a fairly large impact on Japan sensors usually cost higher than other product areas. We have many domestic video Showcase, the company point of view, the emphasis on product quality and performance of businesses mostly use Japanese company SONY CCD, and give more consideration to cost the company the choice of South Korea's most CCD products. Performance of the product from the outside look evenness * lens imaging: we can notice different evenness Video Showcase imaging product is different, and a high quality video showcase products generally have good uniformity, either Telephoto or look closer, with the edge of the lens focus focus center is basically the same, there is no significant difference. And some bad quality products, you can clearly see the focus, the edge is not very significant real sense, it will seriously affect the results of the product. * Contour pincushion distortion: Figure 1 is a standard rectangle, Figures 2 and 3 are actions that occur after pincushion distortion: pincushion distortion obvious booth usually optics choice grade is not enough, seriously affecting booth results. * Illumination uniformity: Stand no more than two common forms of lighting, bilateral lamp or single lamp. Unilateral lighting compared to bilateral lighting, usually more obvious uneven illumination phenomenon, but we also note that a Japanese JVC AV-P820C single lamp, the use of design grating, uniform illumination degree compared to other single-lamp products have been greatly improved. As for the bilateral lamp lighting, due to conflicting sidelight range of activities, so that different products demonstrated differences still exist, particularly for smaller ranges sidelight active video Showcase, at the show will be significantly smaller in-kind The problem of insufficient lighting. * Color reproduction: Stand for images or text performance is equally important, however, showcase some bad quality products, in order to make up for lack of text Showcase performance capabilities, and significantly improve the contrast black and white, this result would make Booth at the expense of the gray scale and color performance capabilities. In the actual purchase process, we can compare each character stands for performance capability and colorful pictures of reducing capacity; different brands of China-made products, even on the domestic market, the two most important imported brands are also considerable differences in performance.