Dynapik offers a free online tool to change image types - no need to download anything. It's quick and easy to use. You can change your IIQ images to PNG64 format. This tool works for both professionals and casual users. Convert your images to PNG64 in seconds.
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Phase One IIQ
Intelligent Image Quality for high-end medium format photography.
IIQ (Intelligent Image Quality) is the proprietary raw image format developed by Phase One for their high-end medium format cameras. Known for storing massive amounts of data from sensors exceeding 100 megapixels, IIQ files are designed to preserve the utmost color fidelity and dynamic range, catering to professional commercial and landscape photographers.
IIQ files are essentially specialized TIFF containers. They come in two primary compression variants: - **IIQ L (Large)**: A comprehensive lossless format. It keeps 100% of the sensor data but results in very large files. - **IIQ S (Smart)**: An intelligent near-lossless compression. It reduces file size significantly (often by 30-50%) by discarding data that is mathematically redundant or invisible to the human eye, without degrading the editability of the raw file.
Phase One introduced IIQ alongside their digital backs to handle the enormous data throughput of medium format sensors. It evolved in tandem with their Capture One software, which is widely regarded as the industry standard for tethered shooting and raw color grading.
PNG-64 (64-bit RGBA)
The ultimate format for transparency precision in VFX and compositing.
PNG-64 is the heavyweight champion of the PNG family. It combines the 16-bit per channel color depth of PNG-48 with a 16-bit alpha channel. This provides 65,536 levels of transparency, compared to just 256 levels in a standard PNG-32. This format is almost exclusively used in high-end visual effects (VFX), 3D rendering, and professional compositing. When you are rendering a CGI character to place into a movie scene, you need the edges to blend perfectly with the background, even after heavy color grading. PNG-64's 16-bit alpha channel ensures that semi-transparent pixels (like motion blur or hair) retain enough data to be manipulated without becoming jagged or discolored.
A PNG-64 file contains four channels: Red, Green, Blue, and Alpha. Each is 16 bits deep (16 x 4 = 64 bits). The 16-bit alpha channel is the defining feature. In an 8-bit alpha channel (PNG-32), a very faint shadow might only have 3 or 4 levels of transparency steps, leading to visible banding when contrast is increased. In a 16-bit alpha channel, that same faint shadow has hundreds of steps, ensuring it remains smooth under any processing.
Like PNG-48, PNG-64 has been part of the standard since the beginning but was largely ignored by the web community due to file size. It found its niche in the 3D and video production industries as a more accessible alternative to formats like EXR or TIFF for storing intermediate render passes.
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