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11/07/2005 04:37:17 AM · #1 |
After reading through the "Alamy Challenge" thread, I wanted to ask a question about upsizing pictures.
I had never heard of software specifically for upsizing such as those discussed in the thread. I have Photoshop 6.0 on my PC and tried doing some upsizing over the weekend. There is a "Resize Wizard" in the help menu which is quite easy to use and seemed to give good results over a zoomed in crop of the original photo (Original very pixelated compared to upsized image). The manual resize options have check boxes for Bicubic and Bilinear. Bilinear seemed to work better than Bicubic.
Basically, is this doing the same thing as the "Genuine Fractals" type of software?
Also, in the wizard, it asks for you to set your LPI (Lines per inch) preference. How does LPI relate to DPI? The default that it was set to was 133?
I was upsizing smaller (3mp images) as I dont have my XT yet, so I am hoping for much better results from that!
Any help anyone can offer will be appreciated!
AL. |
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11/07/2005 08:07:52 AM · #2 |
Just go to image, image size, select percent, select like 110% and do it in steps. It helps to choose Bicubic Sharper also. The lens you use is going to play a big part in how clear the photo is at full size. Truthfully, I had a s5100, and it wasn't up to that task...the EF-S 18-55 is pretty decent though when the lighting is there, but like I said, nothing beats high quality glass.
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11/07/2005 08:13:01 AM · #3 |
I'm not POSITIVE about this, but I think that bicubic is supposed to be much better than bilinear, in a general sense. Of course, there may be images in which bilinear works better, and perhaps your images are some of those. But like I said, I'm not positive on that point...
But no, neither of those techniques use the same internal algorithms as something like Genuine Fractals. At least not the way I understand it.
Resizing in PS in steps of 10% is supposed to give better results than one giant step. In other words upsizing by 110%, 110%, 110%, 110% is supposed to look better than one upsizing to 146% all at once. And in my experience that is true. I don't know why, but it does seem to work. Maybe somebody knows why it works?
I don't believe the LPI or DPI matters at all to Alamy, or to the digital file at all. Those only come into play when you actually print the file.
I now use the plugin "resize pro" from //www.fredmiranda.com. It was much cheaper than Genuine Fractals, and seems to do a very good job. At least for the things I've used it on.
Hope this helps...
Doug
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11/07/2005 08:19:42 AM · #4 |
oh thought I'd add that if you're into shootin RAW, take your RAW file into photoshop, and just select the size you want it to be...then there's no compression at all before it resizes it...that method seems to work very well also...but I RARELY shoot RAW...just did it yesterday for a test to compare the results for upsizing. If RAW files weren't so darn big and a pain to work with and take up so much space, I'd probably shoot everything in RAW...but I'd rather shoot 300 JPG's than 80 RAW images...but that's just how I am. good luck.
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11/07/2005 08:21:37 AM · #5 |
Thanks both - I'll give it a try that way and see how it goes.
As for the s5000, I wasn't expecting great results anyway, just seeing what PS was capable of doing really in rediness for playing with the images from the XT when I get it (13 days!!!!!!)
AL. |
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11/07/2005 08:23:55 AM · #6 |
Originally posted by deapee:
If RAW files weren't so darn big and a pain to work with and take up so much space, I'd probably shoot everything in RAW...but I'd rather shoot 300 JPG's than 80 RAW images...but that's just how I am. good luck. |
I know what you mean. My PC is really slow loading and processing images in PS if they are large files. I think I may get some memory upgrdes to improve it! It is 3 years old now so seriously under spec compared to todays offerings! |
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11/07/2005 08:27:47 AM · #7 |
Originally posted by BIG AL:
Originally posted by deapee:
If RAW files weren't so darn big and a pain to work with and take up so much space, I'd probably shoot everything in RAW...but I'd rather shoot 300 JPG's than 80 RAW images...but that's just how I am. good luck. |
I know what you mean. My PC is really slow loading and processing images in PS if they are large files. I think I may get some memory upgrdes to improve it! It is 3 years old now so seriously under spec compared to todays offerings! |
heh yeah my computer used to love my s5100 -- I could blast through the pictures, one by one so quick, save, burn them all to a CD...and now my computer is just bogged down. Trying to open RAW files and save 50MB TIF's...it's just insane...I think I need more memory also.
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