Many devices will use this preview image when you open a "raw" photo. This preview image is appended to the file containing the raw image data, along with the metadata generated by the camera. You are seeing a preview jpeg generated by the camera that took the shot. ¹ Please see: Why are my RAW images already in colour if debayering is not done yet?Īnytime you view a "raw" image on any device with any particular viewing/editing application, one of two things is happening: For a more complete discussion of how we get color information out of the single brightness values measured at each pixel well, please see RAW files store 3 colors per pixel, or only one? With Bayer masked camera sensors (the vast majority of color digital cameras use Bayer filters) each pixel well has a color filter in front of it that is either 'red', 'green', or 'blue' (the actual 'colors' of the filters in most Bayer Masks are anywhere from a slightly yellowish-green to an orange-yellow for 'red", a slightly bluish-green for 'green' and a slightly bluish-violet for 'blue' - these colors more or less correspond to the center of sensitivity for the three types of cones in our retinas). The raw data itself contains a single (monochrome) brightness value measure by each pixel well. Anytime you open a raw file and look at it on your screen, you are not viewing "THE raw file." ¹ You are viewing one among a near-countless number of possible interpretations of the data in the raw file.
0 Comments
Leave a Reply.AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |