Pixel size is different between CD, PP and Photoshop and Windows

I am just starting an ad for a client that will appear on a website. The size allotted for the ad is 270 pixels w x 370 pixels h, 72 dpi. I created a rectangle in those dimensions in CorelDraw/PhotoPaint. If I look at the size in Photoshop or Windows Explorer the size shows as 360 x 493 pixels. What the heck is going on?

I cannot send the ad in the wrong size. Why are they different?

 I cannot say what is wrong, but I have just tried it and I get a consistant reading on Corel Draw, PhotoPaint, PicWindowPro, Photoshop, and Windows.

Did you set the pixel dimensions and resolution correctly when converting to a bitmap?

 Are you saving the ad as a GIF? JPG? or PNG?

wrote in message news:35900@coreldraw.com...
>I am just starting an ad for a client that will appear on a website. The
>size allotted for the ad is 270 pixels w x 370 pixels h, 72 dpi. I created
>a rectangle in those dimensions in CorelDraw/PhotoPaint. If I look at the
>size in Photoshop or Windows Explorer the size shows as 360 x 493 pixels.
>What the heck is going on?
>

there is no such thing as DPI/PPI online. The web only uses pure pixel
dimensions (height/width). The applications will all read pixels the same
way - there is no difference in how they read them.

The difference would be in how you are creating your items. What are the
exact steps you are using?

niagaramouse:

I created a rectangle in those dimensions in CorelDraw/PhotoPaint. If I look at the size in Photoshop or Windows Explorer the size shows as 360 x 493 pixels. What the heck is going on?

If you export the ad from CorelDRAW, you will get the "Convert To Bitmap" dialog (after the Export dialog), where you can reset the bitmap size.

So probably, the units in that dialog are set to something other than pixels and DPI is set to 96, so you are getting 360x493 px instead of 270x370 px.

If 72dpi is allotted, export your bitmap at 72dpi; maybe they have a reason other than displaying the ad online. So your 270x370 px bitmap is tagged (labeled) with the alloted 72dpi.

Okay, I don't know what was happening yesterday. I originally tried to create the rectangle in CorelDraw using pixels as measurments but it came out too small, so I enlarged the rectangle in PhotoPaint to 270 px x 370 px at 72 dpi exported to jpg and it showed up larger in Photoshop.

I tried it again this morning, this time I created the rectangle in PhotoPaint, save as jpg, then import into CorelDraw, export from CD as jpg and again the size went from 270 x 370 to 360 x 493. I tried it a second time after adding some text to the rectangle (in CD) and now the sizing is okay?? I don't know what happened (perhaps it was 96 dpi like Ahmad suggested) but hopefully it has resolved itself now.

However, I still have one question, when I import the rectangle 270 px x 370 px from PhotoPaint into CorelDraw and I change the measurement units (in Draw) to pixels it shows as 1125 x 1542 px instead of 270 x 370? I attached a picture to show you all.

Sorry guys, I JUST REALIZED WHAT IS HAPPENING, my CorelDraw resolution is set to 300, I just changed it to 72 the dimensions now display properly. Thank you for your responses, Ahmad's mention of dpi made me think about why the bitmap would be larger in draw.

Your drawing resolution is set to 300dpi, while the bitmap resolution is 72dpi.

When you import the 72dpi bitmap, CorelDRAW distributes the 270px on his current 300dpi grid, so 1 x 1 pixel of your 72bitmap occupies 4.166 x 4.166 pixel of your 300dpi grid.

For now, you can just ignore dimensions in CorelDRAW, and set them right in the "Convert To Bitmap" dialog mentioned above (what already happened with you). Or Change your document resolution to match your output; 72dpi (which equals the input bitmap in your case).

For future, always set your Document Resolution to match your output and Pixels as units (Tools > Options > Document > Page > Size).

---
ooops! I'm late again :$ or maybe too fast ;)

 This case illustrates the need for a guide for how Draw works in this respect. i have found that I need to calibrate rulers and set the same resolution as the document resolution, then use zoom 1:1 to get the correct dimensions of the exported stuff if you do it throught the Web Image Optimizer. This should be mentioned in the help file, but it isn't. The problem would largely be avoided if zoom 1:1 was added as default and the default document resolution (when designing in pixels) was retrieved from the rulers and that the user was prompted to calibrate rulers as part of the installation. This is also very good if you want to view documents in their absolute size.

I take a very simple approach to this.

Let's say I need 468 x 60 pixels. I'd set up my document at 4.68 x .6
inches. The same could be done with metric at 4.68 x .6 cm. I don't care
about dpi. It is MEANINGLESS. When I export the file, I know the ratio is
right so I just put in the number of pixels and it is perfect every single
time.

That's the power of CorelDRAW. You can always output the part you want in the size you want.

But if you do as Lars does, you will be able to zoom 1:1 and easily preview your work. You might get unexpected benefits from the right setup!

I hate to say it that way; but DPI is meaningful.

 Yes, why not do it right from the start, then you will have no problems with outputting from the WIO and you'll get to see your docs in the correct size while zooming 1:1.

Lars,

I personally find the WIO useless. I also don't worry about zooming 1:1.
That is my personal workflow and I realize it isn't the best answer for
everyone. So for me, I don't worry about getting anything right except the
size ratio.

wrote in message news:36794@coreldraw.com...
> Lars,
>
> I personally find the WIO useless. I also don't worry about zooming 1:1.
> That is my personal workflow and I realize it isn't the best answer for
> everyone. So for me, I don't worry about getting anything right except the
> size ratio.

I'm the same - I never worry about 1:1, I've just never seen the need for it
since I create things at the size I need them in (or in some cases where the
items will be rather small, I work in a multiple of the end-size, i.e., 2x
or 3x the end-size). And I, too, never use the WIO.

 Well, I appreciate the possibility to view stuff in life size, just to be able to judge if document size and type are the right size.