I have just started using Google sheet's "IMPORTXML" formular to extract webpage meta data for a SEO project.
I am stuck with the following questions:
How to use this formular and XPATH to extract a list of images (on a
page), which don't have an alt tag?
Similar as the question above, how to extract a list of images (on a page), which have an alt tag?
How to extract a list of images (on a page), which do or don't have a
title tag?
Thank you for your help in advance!
Note:
See an example of my question here:
I also referenced the formular on this post http://slesinsky.org/brian/code/xpath_checker.html, which is very old and seemd no longer working.
For the images that have an alt tag, use
=IMPORTXML(A2, "//img/#alt")
For those that don't, use
=IMPORTXML(A2, "//img[not(./#alt)]")
Note that in your example, there is only one img with no alt, so the cell will appear empty, but the selection is made.
I am trying to insert an image in Google Colaboratory (markdown) already saved in Google Drive using this expression  but it doesn't work. For example, the Colaboratory markdown manual shows how to insert a photo inline with this example An inline image: . Ok, that is a photo from internet, but, when I replace that photo for one already saved in my Google Drive it doesn't appear.
If you have a link like this, then I've got a solution.
https://drive.google.com/file/d/-------/view?usp=sharing
In Google Drive, right-click on the picture
Choose 'Get a sharable link'
Click to 'Copy link'. You need reader permissions. Just need the id of the image.
In my case my link is:
https://drive.google.com/file/d/1xDrydbSbijvK2JBftUz-5ovagN2B_RWH/view?usp=sharing
Now we need to copy JUST the image id:
1xDrydbSbijvK2JBftUz-5ovagN2B_RWH
We will use this base link to generate your link with the image id:
https://drive.google.com/uc?export=view&id=your_id
We then copy the id in the link:
https://drive.google.com/uc?export=view&id=1xDrydbSbijvK2JBftUz-5ovagN2B_RWH
Finally, to place as an image in Google Colab:
I tried all the answers above and nothing worked because of a small change Google has created recently(at the time of writing this post). If you click on "Get Shareable link" and paste it, it would look something like this:
https://drive.google.com/open?id=12BumFEqzKxc9mog8tYuUqvpxf10ot6W3
Now just change the open?id to uc?id and it will instantly work.
According to the answers here
From the next 3 formats only the first one worked for me:
Here is an example using plain html instead of markdown.
<figure>
<center>
<img src='https://drive.google.com/uc?id=1Rb6oXW3KufLApvID5MwxsknpoON2CkQ_' />
<figcaption>Image Caption</figcaption></center>
</figure>
This way, you can also center the image, add captions etc
Unfortunately, I have tried the methods above but they didn't work for me. Then I have tried simply right-clicking on the picture that I want to display on colab, and choose 'Get a sharable link', then the link is automatically copied to my clipboard:
The link will be something like
https://docs.google.com/uc?id=-----
Then using colab's picture inserting button, and insert that link to the (https://) part
worked like a magic!
However, if you get a link like this
https://drive.google.com/file/d/-------/view?usp=sharing
after making picture public, it somehow doesn't work.
This below method works for me:
Upload the image on google drive.
Enable link sharing (Right click on image > Get shareable link)
Change access type from 'Restricted' to 'Anyone with link', keep role as 'Viewer', click 'Done'(pop up should close).
Double click on image, Spot 'More actions' icon(top right corner, 3 vertical dots).. click on it and next select 'Open in new tab' from the more action menu, a new windows opens.
Now again, spot 'More actions' icon(top right corner, 3 vertical dots).. click on it and select 'Embed item'. It will give you a HTML 'Embed snippet'.
Copy that HTML snippet and paste it in your Colab noteboook inside a markdown or code cell.
If you use a code cell, you can use magic function %%html (change iframe width and height for your needs).
%%html
<iframe src="link_placeholder" width="600" height="300"></iframe>
I tried all of the above methods, and nothing works for me. However, there is a workaround that bypasses the use of Google Drive altogether: Simply insert the image as Base64 data in normal HTML like so:
<img src='data:image/png;base64, ...lots of base64-data.. style="max-width:100%;" />
If you, for example, are using draw.io to draw a diagram that you want to include, there is a handy option for embedding data (under file->embed). If you choose "image" in this menu, you'll get a pop-up with the relevant code for you to copy. Otherwise there are image to base64-converters online that you can use.
The downside of this method is that you'll end up with a lot of data to paste. However, if you use a dedicated cell for this purpose, there won't be any need to edit that cell ever again.
(As a side note, this method works in most Markdown editors if you for some reason are unable to include an image file. Sometimes it will also work to use SVG data instead of base64, but this does not work in Google Colab.)
Here are my solutions. I liked the first one more.
First Solution :
Step1: First use a wget to fetch the picture, do not use svg file! just png
!wget https://upload.wikimedia.org/wikipedia/commons/thumb/3/38/Jupyter_logo.svg/207px-Jupyter_logo.svg.png
Run the code
Step2: Get the name of the file from last line '207px-Jupyter_logo.svg.png', after you run the wget.
from IPython.display import Image
Image("207px-Jupyter_logo.svg.png")
Run the code!
Second Solution:
use the code below and use png file
from google.colab.patches import cv2_imshow
!curl -o logo.png https://colab.research.google.com/img/colab_favicon_256px.png
import cv2
img = cv2.imread('logo.png', cv2.IMREAD_UNCHANGED)
cv2_imshow(img)
So enjoy :)
Solution for svg or other type of files
Anyway, use your link :)
3rd from Github_md_guideline
Once you get the public URL of the image, you can insert it in a Markdown cell
With
Or in a Code cell (this trick is just in Colab, as far as I know)
With
##markdown 
So you can have Markdown within a code cell.
Link to shareable image is restricted to unique code associated to that picture. Once you update the picture (happens), then you need to update the link too.
Alternative ways are described here . My solution is given there too, so I will not copy past it here.
You can simply copy the picture in the clipboard and paste it in a markdown cell
As suggested by our SEO guys, they wanted to show title tag on product detail page's thumb images. I am able to manage other image's title tags on the same page but not able to set title tag here. Here is screenshot for more idea. http://nimb.ws/hX74Fr
Following files I have modified and added title but no luck.
/vendor/magento/module-catalog/Block/Product/View/Gallery.php
getGalleryImagesJson() function, added title tag
/vendor/magento/module-configurable-product/Helper/Data.php
getOptions($currentProduct, $allowedProducts) function, added title tag.
I assume above files and willing to override if these are the files only. Any help will be highly appreciated.
Thanks in advance.
I am trying to use Lightbox 2 (ver 2.51) with an image map. The site is for a theme park, and the park map image has 8 areas, and each area should have its own slideshow. I tried using rel="lightbox[group1]" but apparently "rel" doesn't work with "area" as it does with "a". The solution on the Lightbox 2 forum page is here http://www.patworx.de/blog/?p=20 and says:
"Workaround:
But Prototype is still able to get the attribute :)
So just replace
imageLink.rel
with
Element.readAttribute($(imageLink), "rel")
and enjoy Lightbox!"
However, I can't find imageLink.rel in the lightbox.js file. This solution mentions Lightbox 2.04, so it may be an outdated solution now. Any ideas for the latest version of Lightbox 2? Thanks in advance.
EDIT:
http://jsfiddle.net/GBpjJ/
I finally answered my own question, in case anyone else is interested...I found this page that actually has a few different ways to do an image map without the "area" tag, which lets you use the "rel" tag with an anchor tag in an image map. The one that worked for me was example 2a. Hope this can help someone else.
http://www.wickham43.net/imagemaps.php
I am pretty new to joomla. The effect I am trying to achieve is http://www.greenjourneys.nl/individuele-reizen.html this. Notice, there is an featured image for each articles.
Can you tell me how to do this?
Just include the image before the page break.
There are a number of components that will allow you to resize the photo easily (or create tumbnails 'on the fly') which would work great for something like that.
However if you just have small images you want to use - simply include the image into the article before the pagebreak and use CSS to control how it lays out on the front page.
You can decide if you want the intro text to show in the main article or not, if you do - then you won't have to include the image again (it will show by default) but if you do not want the intro text to show, just be aware that the image you choose for the front page won't display in the article when clicked on.
Hope that helps.