Jim Crow laws were state and local laws enforcing racial segregation in the Southern United States. Enacted after the Reconstruction period, these laws continued in force until 1965.he Jim Crow laws and the high rate of lynchings in the South were major factors in the Great Migration during the first half of the 20th century. Because opportunities were so limited in the South, African Americans moved in great numbers to northern cities to seek better lives, becoming an urbanized population.
PNG was designed for transferring images on the Internet, not for professional-quality print graphics, and therefore does not support non-RGB color spaces such as CMYK. PNG files nearly always use file extension PNG or png and are assigned MIME media type image/png.
True color, small file. PNG(Portable Network Graphics) file format is regarded, and was made, as the free and open-source successor to the GIF file format. The PNG file format supports true color(16 million colors) whereas the GIF file format only allows 256 colors. PNG excels when the image has large areas of uniform color. The lossless PNG format is best suited for editing pictures, and the lossy formats like JPG are best for final distribution of photographic-type images because of smaller file size.