What is a GIF picture?

GIF pictures store single raster image data or multiple raster image data in 8-bit colors or 256 colors. GIF pictures support transparent, compressed, interlaced and multi-image pictures (animated GIF). GIF transparency is not alpha channel transparency, so it cannot support translucent effect. GIF compression is LZW compression, and the compression ratio is about 3: 1. GIF89a version of GIF file specification supports dynamic GIF.

Advantages: GIF widely supports Internet standards. Support lossless compression and transparency. Animation GIF is very popular, and it is easy to make with many GIF animation programs.

Disadvantages: GIF only supports a 256-color palette, so detailed pictures and realistic photographic images will lose color information, but they look tonal. In most cases, the lossless compression effect is not as good as JPEG format or PNG format. GIF supports limited transparency and has no translucent effect or fading effect (such as the effect provided by alpha channel transparency).

So, of course, your picture is easily distorted.