Google Indexing Images: question
 

Does it take a long time for google to index images?

Just a general question. Thanks.

How long is a piece of string?

Why don't you check your logs and see then Googlebot-Image/1.0 last visited ....
use zgrep to check a compressed archived log

Specifically, I have say 40 indexable images on a post (in user friendly gallery format). It seems about 4-6 of them get indexed within a week and sometimes a month. But 35 of them aren't. Just wondering if google slowly adds them over time, or they cap it?

Good call. Looks like it's constantly being hit up. (via server stats)

Looks like I'm getting steady crawl downloads even on days I don't post. Maybe it's just taking time? Screenshot by Lightshot

nope..........

What is your definition of a long time?

It's going to be down to the usual algorithmic factors, e.g. how many high authority links are there to your page.

If you're looking for individual photos to be indexed, it's best if they have unique file names with keywords and have title + alt tags that reinforce those keywords.

Google still uses inbound links to prioritize the indexing of images so if you're finding not all your images are in the index, you may want to build some inbound links to the specific images.

submitting an image sitemap can also help you with that...

title tags + alt tags = recipe for de-indexing

Reference: On-Page Ranking Factors - SEO Best Practices - Moz

You might want to try this on some images to see how well it works for SEO indexing...
image - schema.org

What do SEO expert sites and witch doctors have in common? Just about everything :1orglaugh

Obvious but make sure your image file size is optimised.

Use a good title tag.

Get links in to the page.

:1orglaugh :1orglaugh:1orglaugh

That's "page title" + "alt tags"

Not "title + alt tags"

Some people attribute one or the other to an image. Attributing both a title tag and an alt tag to an image will likely get it de-indexed.

That's what I'm saying.

Hmmm... I haven't experienced that. I'm not saying it's not true, I've just seen references where the two should be used together. I'm not proposing keyword stuffing or anything.

"JohnMu from Google: alt attribute should be used to describe the image. So if you have an image of a big blue pineapple chair you should use the alt tag that best describes it, which is alt=â?�big blue pineapple chair.â?� title attribute should be used when the image is a hyperlink to a specific page. The title attribute should contain information about what will happen when you click on the image. For example, if the image will get larger, it should read something like, title=â?�View a larger version of the big blue pineapple chair image.â?�
source:
How Many Words In IMAGE ALT Text For Google SEO? | Best Practices

Using the title together with the alt attribute (and not stuffing keywords into it but using them as intended) has provided pretty good results for me in the past. If you have a reference where using the two together is not a good thing, please share!

As long as you use the title tag on text linking to an image and an alt tag on an actual image, you're fine.

Attaching a title tag to an image that already has an alt tag is asking for a bitchslapping from a GoogleBot.

I did it recently and had my images de-indexed.

As soon as I stripped the title tags out, the images were re-indexed.