On Jul 31, 2012, at 5:26 PM, Perian Sully <perian at emphatic.org> wrote:
> Hi everyone - > > I was wondering if anyone knew of any Adobe Bridge extension or other > third-party software that would allow me to sort by color, and then move a > selection to another directory. Basically, I have a directory of 8600 > images, captured in RGB, but about 2/3rds of them are black and white > photographs. I would like to identify and segregate the b/w photographs and > convert them to grayscale. However, they're all mixed in with color > photographs, making selecting them incredibly time-consuming. > > I did find this rather neat little software package, ImageSorter, which > does almost everything I want... save being able to select and move the > black and white images. http://pixolution.does-it.net/index.php?id=18 > > It looks as though Adobe is working on it as a feature in a future release, > but that doesn't help me now. I don't know of any graphical browsers that offer this, but it's easy to do using ImageMagick (wrapped in a shell script, for instance). There's a section in the ImageMagick docs with a few approaches to measuring the B&W-ness of an image (ultimately it comes down to measuring the difference between an image and a grayscale copy of itself). Are these B&W images (in RGB files) truly neutral? If not, and they are toned B&W, then you'll need a different approach. Most scans of B&W photography I've seen would have lost a lot if converted to grayscale? Hope this helps, Roger Howard
