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PDF Image Format

PDF (Portable Document Format) is primarily known for its ability to preserve document formatting across different platforms and operating systems. While it's excellent for text-heavy documents, it can also handle images quite well.

When it comes to images within a PDF, they are typically stored in various formats, including:

JPEG (Joint Photographic Experts Group): Often used for photographs or images with complex colors and gradients. JPEG compression is lossy, meaning some image quality may be sacrificed to reduce file size.

PNG (Portable Network Graphics): Ideal for images with sharp edges, transparency, or limited colors. PNG compression is lossless, preserving image quality without sacrificing detail.

TIFF (Tagged Image File Format): Commonly used for high-quality images and professional printing. TIFF supports lossless compression and maintains all image data.

GIF (Graphics Interchange Format): Suitable for simple graphics or animations with limited colors. GIF compression is lossless, but it's not ideal for preserving high-quality images.

BMP (Bitmap): An uncompressed image format commonly used in Windows environments. BMP files are large and may not be suitable for sharing or distribution due to their size.

When you embed an image into a PDF document, the format of the image is retained. So, if you insert a JPEG image into a PDF, it remains in JPEG format within the PDF file. Similarly, for PNG, TIFF, GIF, or BMP images. This helps maintain the quality of the original images while keeping the PDF file size manageable.