Avatar pic help.

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elderone
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Joined: Wed Oct 17, 2012 21:01 pm

Avatar pic help.

Postby elderone » Thu Jan 31, 2013 16:07 pm

How do I size a pic to use as an avatar.I have tried and tried but keeps getting rejected.Any correct way of doing it?.
cheers
Dulce et decorum est Pro patria mori

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sungod
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Joined: Sat Nov 07, 2009 13:52 pm

Re: Avatar pic help.

Postby sungod » Thu Jan 31, 2013 16:56 pm

80x80 pixels
my bike - faster than god's and twice as shiny

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elderone
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Re: Avatar pic help.

Postby elderone » Thu Jan 31, 2013 17:18 pm

Done that but says 9.7kib what ever that is.
Dulce et decorum est Pro patria mori

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Canny lad
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Joined: Sat Jan 26, 2013 00:07 am

Re: Avatar pic help.

Postby Canny lad » Thu Jan 31, 2013 18:34 pm

Had the same problem elderone. Google resize image to 80x80 and I found a website in the results that let me resize my image and then save it so it would upload.

Good luck, it's a faff but you'll get there.

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Gizmodo
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Re: Avatar pic help.

Postby Gizmodo » Thu Jan 31, 2013 20:06 pm

As said it needs to be 80x80 pixels, but it also needs to be less than 9.77kb in size.

Imagine a picture as a grid of 80 by 80 squares. If each square could be black or white then you would need 80 x 80 bits (a bit is an on or an off / a 0 or a 1) to store the image. The problem is that in most images each square can be 1 of 16 million colours. So each square in a default image needs 24 bits. So in your 80 x 80 image you multiply that by 24 bits (80 x 80 x 24 = 153,600 bits which is 150kb) "k" is x1024 in binary.

So as well as reducing the dimensions of your photo, you also need to reduce the number of colours. 24 bit colour is "True Colour" (16 million colours per square), 16 bit colour is "High Colour" (or 4096 colours per square) or 8 bit colour gives you 256 colours per square.

Reducing your image to 16 bit colour will be 80 x 80 x 16 = 102,400 bits / 1024 = 100kb (still too large)

Reducing your image to 8 bit colour will be 80 x 80 x 8 = 51,200 bits / 1024 = 50kb

If you still can't face it, send me a PM, I'll give you my email address, send me the image and I'll do it for you.

SmoggySteve
Posts: 2362
Joined: Sun Nov 04, 2012 20:10 pm

Re: Avatar pic help.

Postby SmoggySteve » Thu Jan 31, 2013 21:33 pm

Open a pic in windows with paint.

Resize on toolbar - change size to pixels. change to 80 on horizontal or vertical whichever makes 80 the highest value if not perfectly square. look at the bottom of the screen . it will tell you file size. If too big, save as a lesser detailed jpeg to bring down memory size

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elderone
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Joined: Wed Oct 17, 2012 21:01 pm

Re: Avatar pic help.

Postby elderone » Thu Jan 31, 2013 21:38 pm

thanks for all the replies lads,sorted now.Gizmodo thats a very detailed reply and totally over my head but thanks for the offer.Appreciated.
Dulce et decorum est Pro patria mori

SmoggySteve
Posts: 2362
Joined: Sun Nov 04, 2012 20:10 pm

Re: Avatar pic help.

Postby SmoggySteve » Thu Jan 31, 2013 21:42 pm

Gizmodo wrote:As said it needs to be 80x80 pixels, but it also needs to be less than 9.77kb in size.

Imagine a picture as a grid of 80 by 80 squares. If each square could be black or white then you would need 80 x 80 bits (a bit is an on or an off / a 0 or a 1) to store the image. The problem is that in most images each square can be 1 of 16 million colours. So each square in a default image needs 24 bits. So in your 80 x 80 image you multiply that by 24 bits (80 x 80 x 24 = 153,600 bits which is 150kb) "k" is x1024 in binary.

So as well as reducing the dimensions of your photo, you also need to reduce the number of colours. 24 bit colour is "True Colour" (16 million colours per square), 16 bit colour is "High Colour" (or 4096 colours per square) or 8 bit colour gives you 256 colours per square.

Reducing your image to 16 bit colour will be 80 x 80 x 16 = 102,400 bits / 1024 = 100kb (still too large)

Reducing your image to 8 bit colour will be 80 x 80 x 8 = 51,200 bits / 1024 = 50kb

If you still can't face it, send me a PM, I'll give you my email address, send me the image and I'll do it for you.


Wow Gizmodo - Do you see in binary like Neo? You kind of went off on one there.


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