1. A control method applied to an electronic apparatus, wherein the electronic apparatus comprises: an array of image display components and an array of image collecting components set in correspondence with each other along a direction perpendicular to the screen of the electronic apparatus, the method comprising: displaying a first window by the array of image display components; obtaining the position of a first region in the first window; turning on the image collecting components corresponding to the first region in the first window in the array of image collecting components according to the position of the first region, wherein the number of the image collecting components corresponding to the first region is less than or equal to the number of the image collecting components in the array of image collecting components; and obtaining a first image by the image collecting components corresponding to the first region; and displaying a second window by the array of image display components, while displaying the first window; obtaining the position of a third region in the second window; turning on the image collecting components corresponding to the third region in the second window in the array of image collecting components according to the position of the third region, while the image collecting components corresponding to the first region in the first window in the array of image collecting components according to the position of the first region are turned on, wherein the number of the image collecting components corresponding to the third region is less than or equal to the number of the image collecting components in the array of image collecting components; obtaining a second image by the image collecting components corresponding to the third region; and providing the first image to a first application to which the first window corresponds, and meanwhile providing the second image to a second application to which the second window corresponds according to the correspondence between the image collecting components and the windows.