HiISO

HiISO is a file format used primarily in the field of digital photography. It stands for High ISO Noise Reduction, and it was developed by Canon as an alternative to their proprietary CR2 format. The HiISO format is designed to store raw image data captured by Canon cameras, but with a focus on reducing noise that can occur at higher ISO settings.

One of the key features of HiISO is its ability to apply noise reduction algorithms during the image capture process. This can result in cleaner images, especially in low-light conditions, where noise is a common issue. However, this noise reduction comes at the cost of some image quality, as the algorithms may slightly alter the original data.

HiISO files are typically larger than JPEG files but smaller than CR2 files. They can be opened and edited using various software applications, including Canon's own Digital Photo Professional and third-party tools like Adobe Photoshop and Lightroom. The format is widely supported by these applications, allowing photographers to process their images as needed.

It's important to note that HiISO is not a widely adopted format, and its use is limited to Canon cameras that support it. As of now, it is not supported by other camera manufacturers, making it a somewhat niche file format. Despite this, HiISO remains a useful tool for photographers who prioritize noise reduction and are willing to accept some trade-offs in image quality.