How to downsize without losing quality

[fbech]

Hello, I been editing some photos, save them in PSD, the weight is like 5 mg to 8 mg, size like 4320 x2432 or similar. I wan to use this pictures for a web site portfolio and would to keep the same look I got in photoshop with grain effects etc. How can I downsize this whithout affecting quality? I have try to change image size in cs6 or tansform the image , but the quality goes down very clearly. Is there any other way, software etc?


Best regards

[JimL]

If you put grain effects in before down sizing it may effect the quality of the photo. I would recommend changing the photo to display/print size and then adding grain so as to keep the appearance you desire.

Jim

[fbech]

thanks, I did not know that, then I have to start all over gain with a lot of pictures, is there any other way? if that´s not the case, can i go back in history with psd files? I tried, just opening the files and try to press backward, I wonder if this possible in some other way


best regards

[JimL]

I use Perfect Resize (from On One Software). It does an outstanding job and can preserve some effects that have been applied. Sales are run regularly and searches for coupons will usually be successful for some discounts and or free shipping.

Jim

[chicagojohn]

I use Perfect Resize (from On One Software). It does an outstanding job and can preserve some effects that have been applied. Sales are run regularly and searches for coupons will usually be successful for some discounts and or free shipping.

Jim

I have tried that too, JimL, and I agree with you.
At the same time, I've tried the built in functions within Photoshop with results I cannot discern a difference with in both directions. Therefore, I elected not to purchase Perfect Resize.

In downsizing, I select Image>Image Resize and then from the drop down list of alternatives at the bottom of the window, I select Bicubic Sharper (for best reduction).

Going the other direction, (and I've had people call me crazy for this but it is what I do based upon empirical evidence), if, for example I am headed for a 20 X 30 print at 300 dpi, I use Bicubic Smoother (best for enlargement), only I don't do it in one step, but rather about eight steps of 110% each time.

I've tried this both ways -- single step and multi step -- in direct comparison with Perfect Resize, and under extreme crop of results, I cannot tell any difference between the multi-step 110% crop and Perfect Resize, but I think the single step may not be quite as good.

This is certainly a borderline judgement, though, and may be subjective, but when I'm getting something blown up to that degree and paying for that, I don't mind doing it in segments just in case my experiments were right.

FYI.... but I think the PS functions work pretty darn well, but since the Perfect Resize can be downloaded and tried for free, one can do one's own side-by-side evaluation and see if the difference, if observed, is worth the purchase price.

[Peano]

thanks, I did not know that, then I have to start all over gain with a lot of pictures, is there any other way? if that´s not the case, can i go back in history with psd files? I tried, just opening the files and try to press backward, I wonder if this possible in some other way

No other way, but learn from your mistakes. You should do non-destructive editing. Work in layers and keep them intact (without flattening the psd file).

If you had your grain on a separate layer, you could generate a web-size jpeg without grain, then transfer the grain from the full-size original psd.