[Sooky 47]

I am curious about ......

when I take a gif image ( which looks good ) and I resize it ....
it then becomes all grainy looking?

and how do I get rid of the grainy look ?

why is that, please !

Lu

Gif's only have so many colors to begin with... the more you resize, especialy up, the worse it will look

when you go up the program you are using has to invent the correct colored pixels as best it can

when you go down it has to eliminate some of the pixels so th blending of the remaining ones is not as good

bout a technical as I can get

buck

[Sooky 47]

Thanks for answering back buck ....... is there anything different I can do?

thanks Lu

not much that I know of...if it's a not very intricate image you can try to improve it manually within the image program one pixel at a time but that gets tedious quick

the further you stray from the original the worse it gets

buck

[Sooky 47]

Thanks so much for the insight buck ..... much appreciated.

Lu

Pleasure

nothing very brilliant just some observations

buck

[brushmaster1]

You might see better results by changing the image to a 24 or 32 bit .BMP, resizing it, then converting it back to an 8 bit .GIF......

[brushmaster1]

Also, when changing the file back to a .GIF, try different dithering options to see what works best.

[Sooky 47]

Hi brushmaster1,
thank-you for replying also.
Here are my choices for saving:


Also:

try different dithering options to see what works best.

Could you explain what this means ....... I don't understand

Thanks in advance
Lu

[brushmaster1]

What imaging program are you using?

Most imaging apps give you an option (usually an "options" or "advanced" button) when saving a 24 bit image as an 8 bit image...You can select different dithering options and color selections (Optimum, windows color palette, nearest color, etc.)

[Sooky 47]

Hi brushmaster1 ,

I had been using what came with xp which is the Paint program ... resently I've gotten Adobe Paintshop 6.0 - but it is all new to me .. I am just learning.

Thanks Lu

[Sooky 47]

brushmaster1 ......... here is a pict of my save options for Photoshop

thanks Lu

[slipe]

Find a newspaper photo you can’t see something in the background clearly like a sign or license plate. Get a magnifying glass and try to enlarge the photo that way to see what wasn’t clear with normal viewing. You won’t increase the information at all but just see the dots the photo is made of. A newspaper photo is only as fine as it needs to be when viewed normally – you can’t increase the information content of the photo by enlarging it.

The same is true of a raster image on a well designed web page. There is just enough information to view it at its normal size onscreen. If you download and enlarge it you just start seeing the dots the image is made of. The dots aren’t as defined as the dots on a newspaper photo, but they are still there. So if by “resize” you just mean “enlarge” and you downloaded the image from the web you are spinning your wheels – if the page was designed correctly there isn’t enough information to blow it up.

If you get the graininess downsizing the image then there is something wrong with what you are doing. But if you are upsizing an image you downloaded from a web page it should look grainy.

[Sooky 47]

Hi slipe ,

If you get the graininess downsizing the image then there is something wrong with what you are doing.

yes .... this sums it up exactly. I am taking an image that is say 350 x 285 and downsizing to eg. 175 x 143 and I get the graininess. the pictures are both saved as Gif.

Lu

[LONGHAIR]

I guess it depends on what you are calling "grainy". If you really mean blocky ( like round or curved things look saw-toothed) then is very possible. You are cutting both dementions in half........that resizes the pic to only 25% if original. It is bound to look blocky then.