In the United States, as in many other countries, motion picture attendance climbed during World War II, and it reached an all-time peak shortly after the war. There was better sound recording and mixing, and in 1940 Disney's introduced stereo sound for movies. The blue-screen process, used to superimpose a person's image on a separate background, was first used in the 1940 movie In the late 1940s filming on location became more common, facilitated by portable power units developed for that purpose. In 1948 the so-called "Paramount decision," which the movie industry unsuccessfully appealed all the way to the United States Supreme Court, ended the vertical integration of the film business. The studios were now compelled to separate cinema operation from production and distribution. Also, this ruling ended restrictive contracts with actors.
But because the film industry relied solely on consumer ticket purchases for revenues, and not on advertising income, the economic impact on magazines was not necessarily a negative one. While ticket costs and the recreational time required to attend motion pictures did eat away at leisure dollars and hours, the new medium spurred an interest in movie stars’ lives both on and off the screen. These publications “satisfied the public curiosity about what was happening during the golden age of Hollywood.” 
The movie industry sought to regain customers by technological ..
Nonetheless, historical records paint a picture of a lively and creative industry that produced over 160 features from the early twenties until Japan's surrender to Allied forces in 1945.From 1909 to 1920, a series of theaters were built in Seoul and in regional cities such as Pusan and Pyongyang.
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In the United States weekly movie attendance declined from 90 million in 1948 to 51 million in 1952, partly as a result of television and partly as a result of the move of many people to the suburbs. Thousands of cinemas closed in the 1950s and 1960s. The movie industry sought to regain customers by technological improvements such as widescreen formats, stereo sound, and 3-D images. From 1952 through 1954, several widescreen formats were introduced, notably Cinerama, which required three synchronized projectors, and CinemaScope and Panavision, both of which used a single projector. CinemaScope, which premiered with the 1953 movie , used anamorphic projection, which stretches an image horizontally. This allowed CinemaScope to use 35-mm film, which was less expensive than wider film, and it gave better image quality than widescreen systems that cropped the frame.
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Also in this decade, the number of color movies increased. The introduction in 1950 of Eastmancolor, a single-strip film which could be used in a standard 35mm camera, made it much less expensive to make a color movie. (Technicolor required a bulky camera, and the company demanded that Technicolor staff be on set.) In the 1950s in the United States, but not in Europe, drive-in theaters became common. The first drive-in movie theater had opened in 1933, but there were very few drive-ins before 1946. The number in the U.S. grew from 800 in 1948 to 6000 in 1961, which was the high point for the business, and in 1956 more people went to drive-ins than to "hardtop" cinemas. The drive-in movie business, however, underwent a great decline in the late 1970s and early 1980s, in part because people had color TV in the home and because real-estate prices and a limited season made it much more expensive to operate a drive-in than a traditional movie house.
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In Europe during the interwar years, the film industries in most countries thrived. Indeed, French and British cinema achieved international success in the 1930s, while in the same period the totalitarian regimes of Germany, Italy, and the Soviet Union made much use of cinema as a propaganda medium. In Japan, for cultural and financial reasons, silent movies continued to be made through the 1930s.