Search found 7 matches

by blair
2016-09-11T14:35:28-07:00
Forum: Users
Topic: Extract largest thumbnail / preview image from RAW (NEF/CR2) image file, automatically
Replies: 4
Views: 3414

Re: Extract largest thumbnail / preview image from RAW (NEF/CR2) image file, automatically

Thanks for the replies! I started playing with exiftool. The JpgFromRaw option does basically what I want. Somewhat unrelated, I have noticed the NEF displays much more "nicely" in photoshop than the exiftool-outputted preview does. The preview is darker. I guess making a preview which most closely ...
by blair
2016-09-11T12:52:08-07:00
Forum: Users
Topic: Extract largest thumbnail / preview image from RAW (NEF/CR2) image file, automatically
Replies: 4
Views: 3414

Extract largest thumbnail / preview image from RAW (NEF/CR2) image file, automatically

How does one automatically extract the largest thumbnail/preview JPEG file from a RAW image file? I could have sworn I figured out how to do this with convert, but I can't remember for the life of me how I did it. The best I've found today is exiv2, using the '-e' operator with the 'p' option. This ...
by blair
2016-08-20T16:58:58-07:00
Forum: Developers
Topic: Get perceptual hash value for image using command line
Replies: 55
Views: 26712

Re: Get perceptual hash value for image using command line

Hey fmw42 & snibgo, I just wanted to say I started messing about with the tips you gave me and it seems to be working quite well. Same-images return a difference of 0. I took one high-quality JPEG (@ 2448x3264 pixels) and compressed it slightly and reduced its size to 979x1305 pixels. My compare_has...
by blair
2016-08-08T09:17:53-07:00
Forum: Developers
Topic: Get perceptual hash value for image using command line
Replies: 55
Views: 26712

Re: Get perceptual hash value for image using command line

No problem snibgo, all of this information is a handy start - very much appreciated.
by blair
2016-08-07T20:14:28-07:00
Forum: Developers
Topic: Get perceptual hash value for image using command line
Replies: 55
Views: 26712

Re: Get perceptual hash value for image using command line

Thanks Fred! I will experiment with those scripts.
by blair
2016-08-07T19:36:37-07:00
Forum: Developers
Topic: Get perceptual hash value for image using command line
Replies: 55
Views: 26712

Re: Get perceptual hash value for image using command line

Thanks guys. Fred: I had found the link you posted, but unfortunately, it left me with as many questions as when I started. Snibgo: I used the command you suggested, and it gives me the image moments as I have seen them when they're generated with something like identify -verbose -features 1 -moment...
by blair
2016-08-07T17:56:00-07:00
Forum: Developers
Topic: Get perceptual hash value for image using command line
Replies: 55
Views: 26712

Get perceptual hash value for image using command line

How can I get the perceptual image hash value of an image using the command line? Is this possible? Does it even make sense? If it does - what's the best way to do this? I'm a novice ImageMagick user & total ignoramus when it comes to perceptual hashing. I've been trying to find a way to generate a ...