sergiomarried Posted June 24, 2019 Share #1 Posted June 24, 2019 Advertisement (gone after registration) Hi, I've been experimenting with fine B&W JPEG processing in LR to see if those could be used in some instances directly from camera, instead of DNG. I've observed that in the shadow areas there many pure white spots, which don't appear on DNG file, only visible in the JPEG. Is this normal or expected? What does it mean? Here are some examples attached Thanks a lot! Sergio Welcome, dear visitor! As registered member you'd see an image here… Simply register for free here – We are always happy to welcome new members! Link to post Share on other sites Simply register for free here – We are always happy to welcome new members! ' data-webShareUrl='https://www.l-camera-forum.com/topic/298643-issue-help-please/?do=findComment&comment=3765735'>More sharing options...
Advertisement Posted June 24, 2019 Posted June 24, 2019 Hi sergiomarried, Take a look here Issue? Help please. I'm sure you'll find what you were looking for!
Exodies Posted June 24, 2019 Share #2 Posted June 24, 2019 It would help if you drew a circle round them. Link to post Share on other sites More sharing options...
sergiomarried Posted June 24, 2019 Author Share #3 Posted June 24, 2019 The weird thing is that when I tried to use the iPhone marker in the photo app they seem to go away mostly. I had to do a screenshot manually of the photo outside Edit mode and here is what I see... little white points everywhere... Welcome, dear visitor! As registered member you'd see an image here… Simply register for free here – We are always happy to welcome new members! Link to post Share on other sites Simply register for free here – We are always happy to welcome new members! ' data-webShareUrl='https://www.l-camera-forum.com/topic/298643-issue-help-please/?do=findComment&comment=3765782'>More sharing options...
Peter Kilmister Posted June 24, 2019 Share #4 Posted June 24, 2019 Could be dust spots. Best to use DNG (RAW) files and develop them. Spots like this can be removed easily in the process. Link to post Share on other sites More sharing options...
sergiomarried Posted June 24, 2019 Author Share #5 Posted June 24, 2019 Thanks for answering Peter, but I don’t get why dust spots would show in the JPEG and not in the RAW file... it doesn’t make sense to me Link to post Share on other sites More sharing options...
jdlaing Posted June 24, 2019 Share #6 Posted June 24, 2019 6 minutes ago, sergiomarried said: Thanks for answering Peter, but I don’t get why dust spots would show in the JPEG and not in the RAW file... it doesn’t make sense to me The jpeg is a further processed image and some areas may have been lightened a little in the process in the image engine. Link to post Share on other sites More sharing options...
Exodies Posted June 25, 2019 Share #7 Posted June 25, 2019 Advertisement (gone after registration) 7 hours ago, jdlaing said: The jpeg is a further processed image and some areas may have been lightened a little in the process in the image engine. Doesn’t the same processing take place when the raw is displayed on the screen? Link to post Share on other sites More sharing options...
jdlaing Posted June 25, 2019 Share #8 Posted June 25, 2019 4 hours ago, Exodies said: Doesn’t the same processing take place when the raw is displayed on the screen? No. The screen display is only a thumbnail sidecar file and not quite the full jpeg. Link to post Share on other sites More sharing options...
Exodies Posted June 25, 2019 Share #9 Posted June 25, 2019 10 minutes ago, jdlaing said: No. The screen display is only a thumbnail sidecar file and not quite the full jpeg. Not the camera screen, in Lightroom or whatever, when you show the picture in the whole window. Link to post Share on other sites More sharing options...
jdlaing Posted June 25, 2019 Share #10 Posted June 25, 2019 2 hours ago, Exodies said: Not the camera screen, in Lightroom or whatever, when you show the picture in the whole window. Now that’s a full camera processed jpeg. Link to post Share on other sites More sharing options...
frame-it Posted June 25, 2019 Share #11 Posted June 25, 2019 3 hours ago, Exodies said: Not the camera screen, in Lightroom or whatever, when you show the picture in the whole window. isn't that jpg preview built out of the DNG..i don't think its the same as a jpg "capture" Link to post Share on other sites More sharing options...
jaapv Posted June 25, 2019 Share #12 Posted June 25, 2019 It looks like JPG artefacts to me, enhanced by postprocessing. Dust spots don't show up as white, as they block the light falling on the sensor. Noise can be pushed into white speckles, but those would be sprinkled all over the image.. Link to post Share on other sites More sharing options...
marchyman Posted June 27, 2019 Share #13 Posted June 27, 2019 On 6/25/2019 at 3:54 AM, Exodies said: Not the camera screen, in Lightroom or whatever, when you show the picture in the whole window. Lightroom processes RAW images with Adobe Camera Raw. The resulting image is again further processed when exported as a jpeg. The combination of those processes is not the same as the process the camera uses to create a jpeg. That said I am confused somewhat by the initial post. - fine B&W JPEG processing in LR The image in lightroom is not JPEG until exported so I'm not quite sure what B&W JPEG processing is supposed to be. What you see on your monitor while editing in Lightroom is NOT a jpeg. I've observed that in the shadow areas there many pure white spots, which don't appear on DNG file, only visible in the JPEG The JPEG produced by the camera or the JPEG produced by Lightroom for export? If you mean the JPEG produced by the camera play with the camera JPEG settings of Sharpness, Saturation, and Contrast. Link to post Share on other sites More sharing options...
jaeger Posted July 14, 2019 Share #14 Posted July 14, 2019 Sergio, can you let us know what ISO on these images? Just show the EXIF that's easier for you. Link to post Share on other sites More sharing options...
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