Після кількох років досліджень і розробок технологія отримання зображень РК-будівельної рекламної машини досягла певної зрілості, але вимоги ринку стають все вищими. Тепер ви можете бачити РК-дисплеї рекламних машин незалежно від того, де ви знаходитесь. Сьогодні техніки Rongda Caijing ведуть вас. Зрозумійте технологію захоплення зображень РК-будівельної рекламної машини.
In order to display true color images on the display screen of LED building advertising machine, the real-time acquisition of video signals must be solved first, and the analog video signals must be collected into digital video images. The early practice is to use the video capture card and some VGA cards with feature-connect to realize it.
The video capture card is used to capture video images, and then obtain the field frequency, line frequency, pixel frequency and the index address of the color lookup table through the VGA feature port. When tracking the CRT image, the red and green color can be obtained by copying the color lookup table. , blue separated digital signal. One method is to use software to replicate regularly, and the other is to use hardware stealing technology, which is more effective and faster.
Створення іміджу рекламної машини
Due to the shortcomings of the above-mentioned technology, such as poor compatibility with VGA cards, unclear edges, and poor image quality, the image quality displayed on the display screen of building advertising machines is also limited. Developed the special video card JMC-LED for LED building advertising machine display screen. The card is based on PCI bus, uses 64-bit graphics accelerator, combines VGA and video functions into one, is responsible for the superposition of video data and VGA data, color space conversion, and fundamentally solves the compatibility problem. Full-screen resolution capture is applied, YUV4:2:2 uncompressed storage technology ensures the optimization of video images, and the video window adopts EST edge enhancement technology to ensure the clarity of the image after scaling. The supported formats are PAL and NTSC, and the video window can be scaled and moved arbitrarily.
The card can extract several synchronous signals of field frequency, line frequency and pixel frequency required for video playing on the display screen of building advertising machine, and separate the red, green and blue signals. The digital RGB format is 8:8:8, each of which can generate 256 grayscales, which can meet the requirements of true color playback on the display screen of building advertising machines.
