While you could solve this by allowing the user to enter custom ranges, I think it would be better if the plugin could calculate optimum buckets by itself based on the population of photos in my particular library. For algorithm inspiration, I suggest looking into Heckbert color quantization. (http://en.wikipedia.org/wiki/Color_quantization) Instead of subdividing 3D color space, you’d be subdividing 1D megapixel space.

So you understand where I am coming from, my immediate need here is that I have a bunch of old photos in my library, scattered all over, and I want to start deleting or downrating ones that have too few megapixels by today’s standards. The < 0.1 MP bucket is minimally useful to me because I have very few photos that were that bad. The next bucket up (0.1-0.5 MP) catches too many photos I want to keep. I suspect I’d be most interested in removing things in the 0.2-0.3 MP range.

I think if you did a Heckbert-like automatic clump finder on the population of megapixel values in my library, you’d automatically generate a bucket in the right sort of range for my needs. It might be necessary to allow a custom number of buckets, to get enough resolution.

The problem is that Lightroom doesn’t allow any of this to be dynamic, so the best I can do is come up with something that seems useful to the most folks. It would be much better for Lightroom to deal with this as a first-class bit of metadata, so the plugin wasn’t needed at all. )-: —Jeffrey

Essentially, I want to create a smart collection that shows me excessively large files (TIF and PSD) that are over a year old. My thought is that at that point, some/many/most of them can be flattened and I can reclaim hard drive real-estate. But I’m stymied by the lack of file size sort. Any suggestions?

The best I can suggest is to use the Library Grid Filter to isolate images that have not been edited in a while, then among those, use my Extended-Search plugin to isolate ones that have a large file size. —Jeffrey

My stock agency requires the JPEG, when opened in Photoshop or any other application, to be at least 48MB in file size. Is it possible to make a plugin that would calculate this?

For example, one of my JPEG files is caclulated by your plugin to be 12.1 Megapixels. The JPEG is 7.6MB. Opened in Photoshop, it’s 34.4MB.

The only two image editing programs that I know to give me this data are ACDSee Pro 3 and Photoshop. Sure would be nice to see it in Lightroom.

Alan

I don’t see how you’re getting 34.4MB from 12.1 MP (2.8 bytes/pixel?), but you can upsize on export to meet arbitrary size requirements. Tim Armes’ LR2/Mogrify plugin has some options to do this automatically. —Jeffrey

There’s a Lightroom SDK forum over at Adobe as well. —Jeffrey

Thank you

local size = photo:getRawMetadata('croppedDimensions')   —Jeffrey

regards from the Stockholm archipelago.

The problem is that compact camera’s tend to record the compact focal length, so a 7mm would be in reality a 28mm for a 35mm camera. The 35mm equivalent should be then calculated one way or another. I believe there is an exif attribute holding the 35mm equivalent but I’m not sure.

Cheers and thanks!