Explain about the Logical Screen Descriptor of GIF files.

Explain about the Logical Screen Descriptor of GIF files.

Logical Screen Descriptor has the following information.

- Logical Screen Width: The width of the image that represents in pixels

- Logical Screen Height: The image height in pixels.

- Packed Field: The element of the image for animation.

- Background Color Index: A value that is pointing to a color in the Global Color Table.

- Pixel Aspect Ratio: The approximate aspect ratio of the pixel in the GIF image