JetSetter | Visual Get/Set Tool for Meteor Session Variables | Web Framework library
kandi X-RAY | JetSetter Summary
kandi X-RAY | JetSetter Summary
Meet JetSetter, the insanely handy development package for Meteor. Starting today, you’ll never have to enter the console to play with your Session variables again. Instead, JetSetter lets you view and modify your Session variables in the browser. And because JetSetter is a debugOnly package, it does not compile to production code.
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QUESTION
Assume that one picture with different resolutions from one host has more than one copies.
At the metasearcher stage, I want to check if the 2 pictures have the same names, but not trivial names (such as image.jpg, photo.jpg ...). In this case, I want to include only the picture with higher resolution.
Example: search for "city"
https://znews-photo.zadn.vn/w480/Uploaded/lerl/2017_10_07/DJI_005701_zing.jpeg
https://znews-photo.zadn.vn/Uploaded/lerl/2017_10_07/DJI_005701_zing.jpeg
The first one should not be returned.
This is a job assignment from a web search team, therefore I care a lot about performance.
My current approach:
*) To avoid trivial names, iterate through the testing queries for image search, count the number of appearance of each token from different URLs after tokenized by "/", and manually pick the most appeared tokens in the URLs which are similar to "photo", "picture", "background", etc... In the end, I will have a set of trivial names.
*) For pictures with the same name, each picture I get its dHash, its resolution, for every pair of pictures with dHash difference less than a certain thresh hold, I discard the picture with smaller resolution.
Edit: After consulted with my manager, I realized that I misunderstood the requirements. I should only work purely on the URLs without accessing to the actual images (which would be too expensive). With the example above, I should be able to discard the first image based on the URLs difference of the two. Also, as the result, expecting accuracy isn't high, anything > 85% should be decent.
I greatly appreciate any ideas/insights on improving my current approach.
...ANSWER
Answered 2019-May-24 at 06:43You won't be able to implement robust solution to this problem without accessing image contents. However, if you still want to work directly with URLs, here are some observations:
- Original images often contain "orig" or "original" keywords in their urls, while thumbnails contain "thumb" or "thumbnails" keywords
- URLs for thumbnails often contain width and height numbers (e.g. 640, 768, 1024)
- Generally, longer URL (from the same host) means a thumbnail. This is because when thumbnail is generated, width/height numbers usually are appended to its name.
Entirely different approach is to retrieve image byte sizes by issuing HTTP HEAD requests. In 99% cases server will return Content-Length
header. HTTP HEAD doesn't download contents, only the HTTP headers. As such, it is not so expensive as downloading entire images.
QUESTION
Hi I was wondering if there is hash or something to detect near duplicate videos. All I care to get around is compression. is there something similar to dhash for videos?
...ANSWER
Answered 2018-Aug-12 at 01:31Since a video is just a wrapper around a series of images, I would use something like pyav to break the video out into images and then process them with dhash
. It looks like you don't need to save the images to disk, and it is written in cython
(and is consequently rumored to be pretty fast.) Alternately you could use opencv
to do something similar, but it I believe the install is more involved.
Here is the ref code for pyav
QUESTION
I have an output which i want to grab information from tracks
then playlists
So from: "total_tracks":12,"tracks":[{
and "total_playlists":6,"playlists":[{
I tried:
...ANSWER
Answered 2017-Feb-16 at 15:40Well, both tracks
and playlists
are arrays, and arrays do not have an uri
component. You need to access an item inside the array:
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