Re: jpg oddity
I presume you are off by 10 binary orders of magnitude, Stan... I suppose you meant 305 Kb and not 305 Mb, did you? On 11/26/2013 9:24 PM, Stan Halpin wrote: I was wondering how LR would be able to handle the RAW to jpg conversion on my Chaos image for the PUG. As I suspected, the chaotic image did not compress as readily as my usual shots, and I had to bring down the 0-100 quality slider in LR. As I went through a series of trial-and-error settings, I was very surprised to find a discontinuity of sorts. At a quality setting of 70, the file was 305mb as reported by my iMac OS-X 10.7.5. At a quality setting of 69 the file size dropped all the way to 264mb. By comparison, I usually use a quality rating of 82-89 to compress one of my RAW images to a 300mb PUG submission. stan -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: jpg oddity
On Nov 30, 2013, at 11:57 AM, Boris Liberman wrote: I presume you are off by 10 binary orders of magnitude, Stan... I suppose you meant 305 Kb and not 305 Mb, did you? On 11/26/2013 9:24 PM, Stan Halpin wrote: I was wondering how LR would be able to handle the RAW to jpg conversion on my Chaos image for the PUG. As I suspected, the chaotic image did not compress as readily as my usual shots, and I had to bring down the 0-100 quality slider in LR. As I went through a series of trial-and-error settings, I was very surprised to find a discontinuity of sorts. At a quality setting of 70, the file was 305mb as reported by my iMac OS-X 10.7.5. At a quality setting of 69 the file size dropped all the way to 264mb. By comparison, I usually use a quality rating of 82-89 to compress one of my RAW images to a 300mb PUG submission. stan Yep. But at least I was consistently wrong! stan -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
jpg oddity
I was wondering how LR would be able to handle the RAW to jpg conversion on my Chaos image for the PUG. As I suspected, the chaotic image did not compress as readily as my usual shots, and I had to bring down the 0-100 quality slider in LR. As I went through a series of trial-and-error settings, I was very surprised to find a discontinuity of sorts. At a quality setting of 70, the file was 305mb as reported by my iMac OS-X 10.7.5. At a quality setting of 69 the file size dropped all the way to 264mb. By comparison, I usually use a quality rating of 82-89 to compress one of my RAW images to a 300mb PUG submission. stan -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: jpg oddity
On Tue, Nov 26, 2013 at 2:24 PM, Stan Halpin s...@stans-photography.info wrote: As I went through a series of trial-and-error settings, I was very surprised to find a discontinuity of sorts. At a quality setting of 70, the file was 305mb as reported by my iMac OS-X 10.7.5. At a quality setting of 69 the file size dropped all the way to 264mb. http://regex.info/blog/lightroom-goodies/jpeg-quality -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: jpg oddity
Thanks Matthew. I wasn't particularly concerned about using a low quality setting because of articles like this that I've seen before. But I did not recall the analysis exposing the 0-100 scale as a gimmick, masking an underlying 0-12 scale. So, oddity explained. stan On Nov 26, 2013, at 2:30 PM, Matthew Hunt wrote: On Tue, Nov 26, 2013 at 2:24 PM, Stan Halpin s...@stans-photography.info wrote: As I went through a series of trial-and-error settings, I was very surprised to find a discontinuity of sorts. At a quality setting of 70, the file was 305kb as reported by my iMac OS-X 10.7.5. At a quality setting of 69 the file size dropped all the way to 264kb. http://regex.info/blog/lightroom-goodies/jpeg-quality -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions. -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: jpg oddity
Stan Halpin wrote: I was wondering how LR would be able to handle the RAW to jpg conversion on my Chaos image for the PUG. As I suspected, the chaotic image did not compress as readily as my usual shots, and I had to bring down the 0-100 quality slider in LR. As I went through a series of trial-and-error settings, I was very surprised to find a discontinuity of sorts. At a quality setting of 70, the file was 305mb as reported by my iMac OS-X 10.7.5. At a quality setting of 69 the file size dropped all the way to 264mb. This is pretty well known. It also exists in Photoshop where you save JPEGs on a scale from 1-12: Quality setting 6 yields larger files than quality setting 7. (Also, quality settings 11 and 12 yield larger files but no better image quality than setting 10.) http://www.impulseadventure.com/photo/jpeg-quantization.html -- Mark Roberts - Photography Multimedia www.robertstech.com -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
Re: jpg oddity
And I've noticed something similar in PS - with some images, lowering the quality slider will sometimes produce larger jpeg files. I remember reading why this occurs but have since forgotten. Kenneth Waller http://www.pentaxphotogallery.com/kennethwaller - Original Message - From: Stan Halpin s...@stans-photography.info Subject: jpg oddity I was wondering how LR would be able to handle the RAW to jpg conversion on my Chaos image for the PUG. As I suspected, the chaotic image did not compress as readily as my usual shots, and I had to bring down the 0-100 quality slider in LR. As I went through a series of trial-and-error settings, I was very surprised to find a discontinuity of sorts. At a quality setting of 70, the file was 305mb as reported by my iMac OS-X 10.7.5. At a quality setting of 69 the file size dropped all the way to 264mb. By comparison, I usually use a quality rating of 82-89 to compress one of my RAW images to a 300mb PUG submission. stan -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
