In this video we will see commonly used image file formats for rendering in vfx production. OpenEXR is a high dynamic-range (HDR) image file format developed by Industrial Light & Magic for use in computer imaging applications. Higher dynamic range and color precision 32-bit floating-point Multiple passes maximum flexibility in compositing uncompressed, lossless compressed and compressed data Open source written in C++ Widely used in film production Large file size Digital Picture Exchange (DPX) is a common file format for digital intermediate and visual effects work originally derived from the Kodak Cineon open file format (.cin file extension) used for digital images generated by Kodak's original film scanner It's uncompressed and you can use the container for SD or HD or 2K or 4K or whatever resolution you need. Preserve linear to log information a great deal of flexibility in storing color information DPX Specification allow for a wide variety of metadata to further clarify information stored (and storable) within each file. Bigger file size Tagged image file format Affordable file format with 4 channels (RGBA) widely supported by image-manipulation applications ability to store image data in a lossless format makes a TIFF file a useful image archive Lempel–Ziv–Welch (LZW) compression, a lossless data-compression technique for reducing a file's size Can be compressed to reduce file sizes using mathematical algorithms such as ZIP or TAR without loss of image data Can embed color space profiles as well as ITPC Metadata Portable Network Graphics Small file size with lossless data compression Color depth can range from 1 to 64 bits per pixel. Widely used for web PNG offers a variety of transparency options Supported by all 2d/3d applications Mostly used as Icons and inside user interface Joint Photographic Experts Group Small File Size – Ideal for test renders and playblast Varying rates of compression reduce file size further, at a cost of loss of original image quality Lossy compression, as the file is compressed to save space Composting on jpg image can degrade quality even further. compression artefacts and noise can be present on HD Renders.

• published: 08 Oct 2015
• views: 982