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07/07/2003 11:44:47 PM · #1 |
I am having a very hard sizing from 2488 X 1622 to the "Challenge" regulations. Also, getting the picture to 150kb. It's driving me Koo Koo !! I know it may sound kinda dumb, but, I'm new to the game. Any help would be very appreciated !
kopa21 |
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07/07/2003 11:49:08 PM · #2 |
I've never used Elements but in PS you go up to Image > Image Size to adjust the size of your photo.
When I save I use the "Save for Web" feature or a simple "Save As." You should have access to at least one of these. After that it's going to be a matter of choosing the quality of jpeg to save. I usually end up somewhere around 40-60% on stuff I use for the net. Anymore is just a waste of bandwidth.
And then, you could also RTFM. ;)
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07/08/2003 12:04:41 AM · #3 |
The thing is, when I re-size the picture to say, 600 X 400, It says the file is like 750 kb. Don't I need to be at 150 kb for the challenges ?
kopa21 |
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07/08/2003 01:26:23 AM · #4 |
There are two different "file sizes" involved here. A full-color image will ALWAYS take a certain number of bytes in its uncompressed form: each pixel takes 24 bits or 3 bytes to display. Multiply the length x width in pixels, multiply by 3 and divide by 1000 to get the results in kilobytes.
For example, the standard NTSC video frame (640 x 480 pixels x 24-bit color) is 900k uncompressed.
The trick to reducing file size is in the compression applied in the JPEG format.
What you need to do is save your final, edited image in an UNCOMPRESSED format, in this case either Photoshop or TIFF.
Then use SAVE A COPY or SAVE FOR WEB to save a copy of that file in JPEG format, adjusting the compression value until the file size is under 150k. The number of pixels does not change, but the amount of bytes on the disk to store the data is reduced. Save a copy so if the JPEG is too big, you can try again with a different setting. DO NOT EVER re-save the JPEG (with a lower setting) as you will add "generational loss" to the other JPEG artifacting. Go back to the PSD or TIFF file and try again.
When the image is later displayed, whatever software you use to open/print/view the image uncompresses the file again; what would go to the printer would be the same number of bytes as the original file (although not the SAME bytes, because the JPEG format is "lossy," meaning it throws away some data, and reconstructs it later).
Hope this helps make things clearer.
Message edited by author 2003-07-08 01:29:11. |
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07/08/2003 01:30:10 AM · #5 |
Simple version of what he said:
1) File dimensions in pixels (height and width)= file size that must be up to 640 pixels on longest side, at least 160 pixels on shortest side.
2) File 'weight' = file's disk size, in bits, bytes, kilobytes and megabytes. This must be 150 kilobytes (kb) or smaller.
Message edited by author 2003-07-08 01:39:10.
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07/08/2003 01:35:46 AM · #6 |
Originally posted by mavrik:
Simple version of what he said:
1) File dimensions in pixels (height and width)= file size that must be 640 pixels on longest side, 160 pixels on shortest side... |
That would be (for DPC) no LONGER than 640, no SHORTER than 160 .... |
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07/08/2003 01:38:41 AM · #7 |
Yeah, not 160x640...I hope. lol
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07/08/2003 01:41:38 AM · #8 |
Originally posted by mavrik:
Yeah, not 160x640...I hope. lol |
That would be a fine dimension for one of those Top Fuel dragsters though. |
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07/08/2003 02:07:33 AM · #9 |
I use Photo Shop Elements 1.0 and this is the workflow that works for me.
1. Crop, Adjust Levels, Contrast, Color Cast and Hue/Saturation until I am satisfied. Save File as Tiff
2. Go to Image/Resize/Image Size. Make sure that Constrained Proportions and Resample Image are checked and set Resample Image to Bicubic.
3. Under Pixel Dimensions set Width OR Height to no more that 640 and click OK
4. The Photo will get small on the screen so I then Zoom to Actual Pixels.
5. Go to Filters/Sharpen/Unsharp Mask and play with setting until I am happy.
6. Then go to File/Save As and make sure Format is set to JPEG and click Save.
7. Then I get a box that says JPEG Options. I move the slider until the Size box at the bottom is less than 150K (It takes a few seconds for the Size to update.) and click OK.
Hope this helps.
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07/08/2003 02:56:13 AM · #10 |
The way I use it
Get your shot the way you want it. Go to the Save For Web under the File menu (I never resize before. and you can always flatten an image before if you have done a border, etc.). Let it render out the pictures before and after view (can take a "few" seconds on a 14+mb file). The boxes to the right of the screen, make sure you are on JPEG and JPEG Maximum and Matte NONE. Select to have the Optimized button on. Set the size of the longest side (I always start at 640) in the New Image box, Constrain Proportions and hit Apply. Renders again. Now you can click in the Quality box or bring up the slider. You can adjust the quality down until the file size is just under 150k.
If my quality gets about 75, I will readjust the image size a little smaller until it is under. You can also check how it will appear in the browser (which allows you to adjust colors, if they seem off a bit) Then save it. I have never had problems or complaints after doing it this way.
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