The PNG (Portable Network Graphics) is a method to store images by compressing images with no loss of information. PNG files can store colors with up to 48 bits per pixel and gray scales with up to 16 bits per pixel. Moreover, it can also store an optional alpha channel for transparency. When PNG is used in the connected network, it can correct gamma and color of images automatically. So you can accurately render the images on different display devices. 

EMF (Enhanced Metafile) is a metafile format designed by Microsoft, and a successor to the older WMF format. EMF is a newer 32-bit version with additional commands. It is easy to read on MS Windows computer while harder to read on other platforms. EMF files are usually stored between 5 to 10 KB in size, and EMF images do not support transparency. The EMZ format is a compressed version of the EMF format. EMF+ is an extension to EMF that allows GDI+ records to be stored. There are two variations on the EMF+ format: EMF+ Only and EMF+ Dual.

JPEG (Joint Photographic Experts Group) is a way to store images by compressing digital images, especially for natural or real scenes. However, it is not suite for online drawings and cartoons. When compressing images, some information will be lost. But human eyes wonít find the inconspicuous difference.

To convert png emf to jpg file, please download JPEG Photo Converter.



Other image format definition:

PIC also called PICtor is an image file format developed by the principal author of PCPaint. It is a device-independent raster image format, but it could also contain additional information about the device that it was created on. Though PIC format has been extended to record true-color (24-bit) images, itís frequently used to store palette-indexed images ranging from 2 or 4 colors to 16 and 256 colors.

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