My website is http://snacksandsocks.com/ I have downloaded a transparent image of my logo I got off Fivver from Canva. Now when I put that image into the logo section on my Wordpress it still is showing with a white background. I think it might be the theme from all the research I've done. I was just wondering if I could use CSS to get rid of it?
Because you image is a jpeg image which does not support transparency. Try to save it in png.
I found a way to do this with CSS3, but IE still doesn't support it. I wish to know if there is a way to do it so that it may be compatible with all of the popular browsers.
I understand I can do it with a mask, but if I want to display a user-uploaded image in the background this is not an option or at least I don't know how to achieve that. Can anyone give me an idea about it? Maybe an image processing in the background when the image is uploaded to turn it into circle and make a transparent background, but I don't know how to process that?
You can do this via CSS3 border-radius, but as you mentioned, old IE does not support this property.
But PIE.htc (PIE.js in my example) can pollyfill this in-
hence- http://codepen.io/hwg/pen/IBrow.
This uses standard border-radius, and a copy-and-pasted pie.js,
The border radius is 50% of the height and the width of the image.
I can't speak for performance (see the docs), but I think this does what you want.
You can overlay a PNG image that has a transparent circle in the middle of a square with the background color you need. Then position this over the uploaded image to give it the illusion of being a circle.
I'm looking to see if this is possible and if so how to do it. I want the user to upload an image with a white background. The image can be anything from a pair of shoes to a hat. The website will then automatically turn that white background transparent then store it. What I want to know is there a way using HTML Canvas/CSS to transform that white background to 100% transparency?
You can have a look at this answer, which explains nicely how to change colors in an image using javascript : How to change color of an image using jquery
However, you should do this using server side code, and be aware that results may vary, as just removing a color will not look nice on the edges of your object.
I have a site that uses images for buttons, and I have a few images with some white space in the background, they are rounded rectangle buttons like the app store icon. They look good when compared to a background with white space, but when I use anything other than white, the little white space shows up and it looks terrible. Is there any sort of way that I can set the transparency color so that white space will disappear?
You need to make them PNGs or GIFs. PNGs support transparency and are the most common, as they also support higher quality images.
You can use a free photo editing program like GIMP to 'select' the white and delete it out.
http://www.gimp.org/
Photoshop is also a popular tool.
Is it possible to have a transparent photoshop image render in CSS? I tried saving as jpg and gif with transparency selected but when I overlay it in css it shows the background color behind it and not the image which is under it. I played with the z-index and it didn't help.
Thanks
JPEG images do not support transparency.
You need to save the image as a PNG file, which does support transparency.
If you need to support IE6, you'll also need to use the filter proeprty.
You need to save it using an image format that supports the type of transparency that you want. The JPEG format doesn't support transparency at all.
There are two types of transparency, transparency index and alpha channel. The GIF and PNG-8 formats support transparency index, i.e. one of the 256 colors are chosen to represent transparency. That means that each pixel in the image can only be either 100% transparent or 100% solid.
The PNG-24 format support alpha channel. That is transparency value for each pixel, so that it can be anything from 100% transparent to 100% solid (in 256 levels).
If your image has mostly fully transparent or fully solid pixels, you can use transparency index, but if it has a lot of partly transparent pixels, you have to use alpha channel.
Note that older versions of IE has problems displaying the transparency in PNG-24 images correctly.
First, have a transparent background (as in no background) as the first layer of your photoshop file.
Be sure it has grey and white squares in the background, which means it is transparent.
When you're ready to save, go to the File Menu, and hit Save for Web
Select the PNG file format and be sure it has "Transparency" checked.
Just press SAVE and give it a name and that photoshop image will be saved into a transparent background PNG file which presents more colors, and it's smaller than a GIF file and is as good as a jpg.
As SLaks pointed out, use a PNG image file for this. JPEG won't do, I am not sure why GIF wouldn't work...
I took a look at a project I was doing involving some translucent background and its CSS, and this is what I found:
background-image: url(../images/translucent_white.png);
So it really is that simple. Just save your picture with transparency as a PNG.
You need to save it as a .png file as mentioned but this is tricky when it comes to IE6. It depends on if the image you have is using a gradient that transistition to the transparency. For instance a shadow.
If you have an image that has a shadow (or any gradient) than you are best off using a .png but this will now work for IE6 and you should follow the advice of SLaks. In my experience though I stay away from javascript fixes like this and just choose to save the image w/ the desired background.
If you do no have a gradient then the .gif is the way to go as it will be supported in all browsers.
I recommend using a .gif filetype; it supports transparent backgrounds and works in most cases. .jpgs don't support transparent backgrounds at all. .pngs support nice alpha-transparent backgrounds, but not in IE6. (Using the AlphaImageLoader filter can cause page slowdown and browser crashes.)
First off, make sure that your image has a transparent background in Photoshop - often a white and grey checkerboard. Then, choose "Save for Web" (or something close to that, it varies in different versions) from the File menu, choose whatever GIF preset works best, and be sure that "Transparency" is checked.