Tag Archives: conversion

Color, Formats, Processing, Raspberry Pi, Sensors

Opening Raspberry Pi High Quality Camera Raw Files

17 Comments

The Raspberry Pi Foundation recently released an interchangeable lens camera module based on the Sony  IMX477, a 1/2.3″ back side illuminated sensor with 3040×4056 pixels of 1.55um pitch.  In this somewhat technical article we will unpack the 12-bit raw still data that it produces and render it in a convenient color space.

still life raw capture data file raspberry pi high quality hq cam f/8 1/2s base analog gain iso adobe rgb
Figure 1. 12-bit raw capture by Raspberry Pi High Quality Camera with 16 mm kit lens at f/8, 1/2 s, base ISO. The image was loaded into Matlab and rendered Half Height Nearest Neighbor in the Adobe RGB color space with a touch of local contrast and sharpening.  Click on it to see it in its own tab and view it at 100% magnification. If your browser is not color managed you may not see colors properly.

Continue reading Opening Raspberry Pi High Quality Camera Raw Files →

adobe camera raw, Color, LR, Processing, Sharpening

How Is a Raw Image Rendered?

19 Comments

What are the basic low level steps involved in raw file conversion?  In this article I will discuss what happens under the hood of digital camera raw converters in order to turn raw file data into a viewable image, a process sometimes referred to as ‘rendering’.  We will use the following raw capture by a Nikon D610 to show how image information is transformed at every step along the way:

Nikon D610 with AF-S 24-120mm f/4 lens at 24mm f/8 ISO100, minimally rendered from raw as outlined in the article.
Figure 1. Nikon D610 with AF-S 24-120mm f/4 lens at 24mm f/8 ISO100, minimally rendered from raw by Octave/Matlab following the steps outlined in the article.

Rendering = Raw Conversion + Editing

Continue reading How Is a Raw Image Rendered? →