PPT imported GIF image cannot be played

The PPT imported GIT image cannot be played

The PPT imported GIT image cannot be played because the PPT will automatically compress the image when saving, causing GIT The picture animation effect is invalid. The solution is to enter the picture toolbar, check the option to compress pictures when saving in the "Options" of "Compress Pictures", and then click OK.

GIF

The name of the GIF format is the abbreviation of Graphics Interchange Format. It was created by Compu Serve in 1987 to fill the gap between Developed due to gaps in platform image formats. GIF can be supported on multiple platforms such as PC and Macintosh.

GIF is a bitmap. The general principle of bitmap is: a picture is composed of many pixels, each pixel is assigned a color, and these pixels are combined to form a picture. GIF uses the Lempel-Zev-Welch (LZW) compression algorithm and supports up to 256 colors. Due to this characteristic, GIF is more suitable for pictures with less color, such as cartoon shapes, company logos, etc. If you encounter situations where true colors are needed, the expressive power of GIF will be limited. GIF usually comes with a palette that stores the various colors that need to be used. In web applications, the file size of images will obviously affect the download speed. Therefore, we can optimize the palette according to the characteristics of GIF with palette and reduce the number of colors used in the image (some images cannot use it. colors can be dropped) without affecting the quality of the picture.

The biggest difference between the GIF format and other image formats is that it is completely designed as a public standard. Due to the popularity of the Compu Serve network, many platforms support the GIF format. Compu Serve promotes GIF by distributing format instructions for free, but requires software that uses the GIF file format to include a description of its copyright information.

GIF Features

(1) The extension of the GIF format image file is ".gif".

(2) performs best for grayscale images.

(3) There are two versions: GIF87a and GIF89a.

(4) Use the improved LZW compression algorithm to process image data.

(5) Palette data is divided into general palette and local palette, with different color values.

(6) Does not support 24bit color mode, and can store up to 256 colors.

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