Picture definition is stored in a memory area called the refresh buffer or frame buffer. This memory area holds the set of intensity values for all the screen points.
A refresh buffer is a buffer that is responsible for refreshing or updating the contents of a contents pane or a window when an automatic or a manual refresh is performed.
A framebuffer or frame buffer is a part of the RAM of a system that is used to store a bitmap file that is responsible for displaying a video. In other words, this is a memory buffer that accommodates a full data framework.