Calibration is an important part of light field photography: Image processing and image quality can be significantly improved when the physical properties of the camera are known. More specifically, geometric information about the microlenses in a microlens-array-based light field camera can help create more precise depth maps with fewer errors.
Yunsu Bok and colleagues from the Korean Advanced Institute of Science and Technology (KAIST) have devised a new method for geometric calibration which – in contrast to conventional methods – does not rely on processing sub-aperture images. Instead, they extract line features and compute a light field camera’s geometric parameters directly from RAW images. Continue reading
A few days ago, Jan Kučera released updates to both the Lytro Compatible Viewer and Lytro Compatible Communicator, bringing a range of new viewing options to the earlier, and wireless LFP download to the latter.
The author summarizes what’s new:
The wave of major updates finishes with a new release of the viewer. It now renders sub-aperture, epipolar and raw squared views that can also be exported. The sub-aperture images can be laid each over other to achieve subtle refocus effect. The precision improvements and usage of all microlenses should lead to noticeably better previews. Overall stability, especially when dealing with invalid files, was also improved.
This comes with a small update to the communicator as well, allowing you to generate LFP files from the camera over Wi-Fi, so you no longer need to connect it over USB to get your pictures.
Complete changelogs and download links after the break: Continue reading
Are you looking for older versions of Lytro’s Desktop Software? Then head over to Lytro Meltdown site, where you’ll find the download links to previous versions of Lytro Desktop:
Kudos to Jan Kučera (again), for the initiative!
Two quick notes regarding software updates for mobile apps:
Nokia’s Refocus App for Windows Phone 8 has just been released for all Lumia Smartphones, including those that don’t feature PureView cameras. The current app version 184.108.40.206 also promises better focus.
Lumia users can get the app for free in the Apps+Games Store.
Lytro has released a small update to their Lytro Mobile App (version 1.2.2), which brings “bug fixes and performance improvements”, especially “fixed support for HTTP 1.1 Content-Length: chunked”. Lytro Mobile is available for free in the iOS App Store:
If you’ve been longing for an easy way to edit your Lytro images, here’s an early Christmas present: Belgian startup company Vertical Horizon has just released Lightfield Iris for Mac, the first (to our knowledge) piece of commercial third-party image manipulation software for Lytro pictures.
Lightfield Iris allows users to browse and edit processed images from the Lytro Desktop Image Database, and…
- adjust image parameters such as brightness, contrast, saturation and luminance.
- straighten your picture.
- apply unsharp mask and noise reduction.
- Continue reading