JPG to PDF

JPEG/JPG (.jpg or .jpeg) is a bitmap image file format developed for storing photographic images. It was created by the Joint Photographic Expert Group, hence its name. It quickly became a standard format used by digital cameras to store and share pictures on the Internet. The interesting fact is that JPEG uses lossy compression. So why is it so popular in photography, where images are supposed to be snapshots of life?
The strength of JPEG is to offer a compromise between image quality and file size. Compression techniques favor details with a more significant impact on the human eye. Indeed, humans are less receptive to slight differences in color than in brightness (light/dark).
Very flexible, the JPEG format can dramatically reduce file sizes but may introduce artifacts as well, like visible pixels and halos around edges. However, compressing to a 10:1 rate produces almost non-perceptible differences and lighter files. The compression algorithm used in the JPEG format (JPEG compression) is so useful that several other file formats include it, like EPS, PDF, and TIFF.
It is worth noticing that the JPEG standard includes a lossless coding mode , but it is not very popular.

If JPEG is the best format for capturing images , there are many cases where it is not recommended to use it.
JPEG is not suitable for most small images under a few hundred pixels in dimension, and it is not ideal for screenshots. It is also not the best option for images with text or fine line drawings, where the contrast between adjacent pixels can cause artifacts. Such images are better saved in a lossless graphics format such as TIFF, GIF, PNG, or a RAW image format.
If a JPEG image is opened, edited, and saved again, it results in additional degradation, particularly if the image is cropped, or if encoding parameters are changed. Be careful, some editors or apps automatically compress the files without notifying you. Therefore, you shouldn't use JPEG to use and store images for years. For the long-term archival, you should choose TIFF or PDF/A.
Finally, and because of its lossy compression method again, don’t select files saved in the JPEG format in a medical imaging context where accuracy is – literally – vital. In this case, you will need to use the DICOM format.