You need to be aware of this when editing JPEG images with photo retouching software, etc. If JPEG images are overwritten and saved repeatedly, they will be compressed again, and the image quality will be degraded each time. Therefore, this format is not suitable for image editing. However, because lossy compression causes JPEG to truncate some of the data during compression, it cannot be undone once it is compressed. JPEG compression separates the images with a square of 8*8 pixels and replaces the blocks with similar colors. Because data is skipped at that time, if it is compressed too much, the color is uniformized in blocks and the image becomes mosaic-like. However, since the mosaic is hardly noticeable when the compression ratio is increased, it is also used as a storage format for high-definition photography, such as digital cameras. High compression ratio and light data can be used to handle full-color (approximately 16770000 colors) images, making it often used as image data for digital cameras and websites. “.JPEG” or “.JPG” is an image data compression method commonly used in digital cameras, smartphones, and other devices. JPEG is an abbreviation of the name “Joint Photographic Experts Group” of the organization that established the compression standard and is used as the extension name. This chapter provides an overview of the image files that are often used when editing photos. There are several types of image files. We think you are selecting the file format that suits your purpose from among the image file types and using it.
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