Kao što svi znamo, otvoreni LED ekrani se danas široko koriste. Oglašavanje na otvorenom, vođenje saobraćaja, reklamne emisije, itd. uključivat će velike ekrane sa LED ekranima na otvorenom. Spoljni LED ekrani su najproblematičniji među mnogim LED ekranima, jer je spoljašnje okruženje inherentno komplikovano. , Kao što su loše vrijeme, visoka temperatura, itd., ali danas se fokusiramo na fenomen mreškanja vode na vanjskim LED ekranima.
Vanjski led displej
1. Full-color LED display "Water ripple" scientific name "Moore"
When shooting with a digital camera, if there are dense grain textures, inexplicable water wave-like streaks will often appear. This is the moiré pattern. Simply put, the moiré pattern is a manifestation of the beat principle. Mathematically speaking, two equal-amplitude sine waves with close frequencies are superimposed, and the amplitude of the synthesized signal will change according to the difference between the two frequencies.
2. Razlika između talasanja vode i fenomena linije skeniranja LED ekrana u punoj-boji
1. Mreškanje vode: općenito predstavlja nepravilno stanje difuzije u obliku luka!
2. Linija skeniranja: horizontalne crne pruge su ravne linije, uglavnom zbog slabog osvježavanja ekrana, koji je snimljen i predstavljen kamerom!
Vanjski led displej
Third, the process of moiré generation in a full-color LED display
1. Dvije pruge sa neznatno različitim prostornim frekvencijama imaju isti položaj crne linije na lijevom kraju. Zbog različitog razmaka, postupne linije desno ne mogu se preklapati.
2. The two stripes overlap, and the white line can be seen because the black line overlaps on the left. The right side is gradually misplaced, the white line is facing the black line, and the overlap result becomes completely black. There are white lines and all black changes, forming a moiré pattern.
Fourth, the process of LED full-color display moiré phenomenon
Gustina distribucije piksela ekrana u punoj-boji je tačno u intervalu koji CCD može razlikovati. Neizbežna digitalna kamera će i dalje interpretirati neke od prepoznatljivih rezultata, ali će dodati i neprepoznatljive oblasti sivih tonova. Zbroj dvije regularne linije će se formirati, a odraz će biti vizualno periodične talase.
Five, the method to eliminate moiré
1. Change the camera angle. Since the angle of the camera shooting objects will cause moiré, slightly changing the angle of the camera, by rotating the camera, you can eliminate or change any moiré that exists.
2. Change the camera position. In addition, by moving left and right or up and down to change the angle relationship, moiré can be reduced.
3. Change the focus. Too sharp focus and high detail may cause moiré. Changing the focus slightly can change the sharpness and help eliminate moiré.
4. Change the focal length of the lens. Different lens or focal length settings can be used to change or eliminate moiré.
5. Use a front filter to install directly in front of the CCD to make the exposure conditions meet the spatial frequency, thoroughly filter the high spatial frequency part of the image, and reduce the chance of moiré on the LED display, but this will also reduce the sharpness of the image. Spend.
6. Use software to process. Such as NikonCapture or Photoshop plug-ins, etc., to eliminate any moiré on the final image.
Vanjski led displej
Gore navedeno je metoda tretmana i povezano znanje o fenomenu mreškanja vode na otvorenom LED displeju. Nadam se da će vam pomoći da bolje razumete LED ekran. LED ekran je postao najpopularniji veliki{0}}displej na svijetu, i to će proći dosta vremena u budućnosti. Metropolis zauzima glavnu poziciju na tržištu, a srodne industrije će se također razvijati iz dana u dan i cvjetati.
