Forum Home
Press F1
 
Thread ID: 96219 2009-01-03 04:00:00 Image (photo) size Misty (368) Press F1
Post ID Timestamp Content User
734649 2009-01-03 04:00:00 I have some images that take up too much space. They hold memories, but are not great from a artistic perspective. I resized some quite considerably (on Irfanview) but the size on disk remained almost the same.

For example
1536 X 2048 Pixels resized down to 800 X 1066 Pixels

"Current memory size" went down from 9MB to 2.44MB

...however "Disk size" remains approximately the same at 1.14MB.

Now, I guess that most of the detail is still there , but I thought that the disk size would go down somewhat.

Presumably my understanding is incorrect ?

Misty :confused:
Misty (368)
734650 2009-01-03 04:02:00 What format did u save them in? Speedy Gonzales (78)
734651 2009-01-03 04:18:00 What format did u save them in?

Hi Speedy
In jpeg.

I have just been looking at a site
www.thenaildirectory.com
that seems to explain that images can be different sizes so that each contain the same amount of info but are different "weights". Makes quite a bit of sense to think of it in that way.

I am testing saving in lesser "quality" in Irfanview, but seems that you cannot preview changes in quality to see how much difference is made before you make the change. Still searching !
Misty :)
Misty (368)
734652 2009-01-03 04:52:00 Hi Misty. When doing a comparison...
Open several different sized files - one at a time.
Us the "Save as" process and give each a new name.
Such as windmill.jpg and then windmill02.jpg
Then you can see the comparison when viewed under Detail.
You soon get the feel of any reduction.
Scouse (83)
734653 2009-01-03 06:36:00 Hi Misty. When doing a comparison...
Open several different sized files - one at a time.
Us the "Save as" process and give each a new name.
Such as windmill.jpg and then windmill02.jpg
Then you can see the comparison when viewed under Detail.
You soon get the feel of any reduction.
Thanks Scouse - that's excellent - so simple - not sure how it works better than I have been doing .... but it certainly does !
Misty :thumbs:
Misty (368)
734654 2009-01-03 06:53:00 For example
1536 X 2048 Pixels resized down to 800 X 1066 Pixels

"Current memory size" went down from 9MB to 2.44MB

...however "Disk size" remains approximately the same at 1.14MB.
:

What told you that?
Look at a pic in Windows Explorer - DEtail view.
Then again once you've resized it.

Thats telling you the actual file size. Which does decrease.

Because when you resize it does degrade the quality.
pctek (84)
734655 2009-01-03 06:58:00 What told you that?
Look at a pic in Windows Explorer - DEtail view.
Then again once you've resized it.

Thats telling you the actual file size. Which does decrease.

Because when you resize it does degrade the quality.
Hi pctek
thanks for your comment - but I did do this in Explorer (and did a refresh each time) but it did not show a decrease ! - was very careful..
Misty :(
Misty (368)
1