Author Archives: Jim

There’s an oft-told line about how the Apple II made its way into businesses in the late 1970s and early 1980s. Thousands of businessmen walked into computer stores and said. “Sell me a copy of Visicalc and something to run … Continue reading →

For the couple of weeks, I have been spending way too much time trying to develop a way to demosaic infrared raw files without interpolation. My reasoning is that, with a deep IR filter in front of the sensor, that … Continue reading →

Here are a few pictures from yesterday’s Raw Processing Panel, put on by the Center for Photographic Art.  I had a great time, and learned a lot. Thanks to Rex Naden for organizing and moderating the panel, and to my … Continue reading →

I was unable to figure out why Lightroom is boosting the brightness and chroma of 32-bit floating point TIFFs imported into it, so I reluctantly decided to use the correctly-exposed synthetic image with the minus one-stop Lightroom Exposure adjustment as … Continue reading →

Eric Chan has informed me that there are two image-processing pipelines in Lightroom: output-referred, and scene-referred. Raw files get the scene-referred pipeline. Integer TIFFs get the output-referred pipeline. Therefore, all my TIFF test images were getting a different set of … Continue reading →

[Added after the original post. Eric Chan has informed me that there are two image-processing pipelines in Lightroom: output-referred, and scene-referred. Raw files get the scene-referred pipeline. Integer TIFFs get the output-referred pipeline. Therefore, the TIFF test images are getting … Continue reading →

[Added after the original post. Eric Chan has informed me that there are two image-processing pipelines in Lightroom: output-referred, and scene-referred. Raw files get the scene-referred pipeline. Integer TIFFs get the output-referred pipeline. Therefore, the TIFF test images are getting … Continue reading →

[Added after the original post. Eric Chan has informed me that there are two image-processing pipelines in Lightroom: output-referred, and scene-referred. Raw files get the scene-referred pipeline. Integer TIFFs get the output-referred pipeline. Therefore, the TIFF test images are getting … Continue reading →

[Added after the original post. Eric Chan has informed me that there are two image-processing pipelines in Lightroom: output-referred, and scene-referred. Raw files get the scene-referred pipeline. Integer TIFFs get the output-referred pipeline. Therefore, the TIFF test images are getting … Continue reading →

This may be old news to many of you, but I just stumbled on to it and nailed it down. The new(ish) Lightroom exposure control (Process Version 2012) works differently than the Exposure adjustment layer in Photoshop CS 6. While … Continue reading →