When the user uploads an image, WP automatically resizes it to all the sizes that have been registered. Existing images are not resized when the theme is switched. There are filters available to influence the resizing process.

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9
votes
4answers
3k views

Automatically replace original uploaded image with large image size

As our users regularly upload ~6MB images to use on the website (and aren't too familiar with how to resize them first), WordPress stores the originals as well as resizing them to several different ...
9
votes
2answers
10k views

How to scale up featured post thumbnail?

The situation is this: I'm using Video Thumbnails plugin to automatically get and set youtube/vimeo thumbnails as post featured image. The problem is that default youtube/vimeo thumbnail sizes are ...
3
votes
3answers
4k views

Settings in 'Media > Settings' is ignored when inserting images

When I upload an image, it is automatically resized as I would expect, however the sizes for inserting the image seem to ignore the settings I've placed in Settings/Media. In my media settings I have:...
10
votes
10answers
8k views

How to generate thumbnails when needed only?

I have 1000 images. How can i make wordpress to generate thumb only when needed. For example home slider will only use 10 images i dont want the other 1000 images have that thumbnail generated as its ...
10
votes
5answers
7k views

How to disable WordPress from creating thumbnails?

I've been looking around the net for a long time on how to disable WordPress from creating multiple thumbnails. I've seen in most tutorials to set all the images to 0 in the media section. I have ...
13
votes
2answers
402 views

Image quality based on image size

Is it possible to set the image quality based on the image size? I'd like to have better image quality for larger images (80) - and worse for small thumbnails (30). I was expecting a parameter at ...
1
vote
1answer
225 views

Dynamic-Image-Resize Plugin does not output anything

I'm having trouble using the "Dynamic-Image-Resize" plugin by "Kaiser Franz Josef". In my template I'm adding following code: $imgsrc = wp_get_attachment_image_src( get_post_thumbnail_id( $post->...
3
votes
2answers
324 views

There's a way to scale media (images) at 50%?

I wonder if there is a way to scale down uploaded media exactly to 50%. From what I see, with add_image_size you can only specify a width and a height in pixel. The idea is to upload high resolution ...
2
votes
0answers
779 views

How to resize image on client-side before upload?

I've been using Plupload to resize images on the client side before uploading them to the server. I've implemented a front-end form which lets the user select a file from their computer and submit it. ...
2
votes
2answers
607 views

Resizing Images to lower Disk Space Using Plugins

I'm trying to take existing images and shrink the file size down by resizing to photos to a smaller resolution. I've tried a few methods so far: Simply editing the photo in photoshop and reuploaded, ...
1
vote
1answer
1k views

How to get custom image sizes into media uploader dropdown?

I searched net to solve the problem with images size uploaded from media. But not even one worked to me. When I try to insert images from the media into post it does not show my custom image size 608 ...
1
vote
1answer
457 views

Generate fixed image sizes for different pages, eliminate sizes during upload

I've built a few sites in Wordpress and in general I'm quite pleased with all the possibilities it has developed lately. There's one main thing that is utterly confusing for end users; the sizes they ...
0
votes
2answers
2k views

Conditional Statement - check if post has an attachment image

I'm working on a conditional statement (in a loop) that looks for a featured image then grabs a default image if there is none, which I have figured out. But, I also wanted a way to pull the first ...
2
votes
1answer
2k views

resize images not crop

Looking for a hack to resize images on upload (all forms of image uploads on wordpress) to exact dimensions, but not to crop. I will open a bounty for this question since I believe It can be of help ...
0
votes
1answer
466 views

Autogenerated Thumbnail compression depending on size

This is a follow up to this question, in witch the jpg compression is altered depending on what WP's built-in image resulting image size returns. While it may work for most of the people, i'm looking ...