rasterized high contrast edges

Hi gang.

How can I minimize the rasterization on the high contrast edges of the arms when I down size?

Thanks
Ralph

100% crop
full size image down sized

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Assuming you have Photoshop, try "Bicubic Smoother" in the Image Size dialog.

Can't really help much...But I just wanted to say...That's one cold mannequin.

Maybe you could explain what you are referring to by "rasterized high contrast edges" -- are you referring to something about the edges of the skin or the edges of the shadows on the skin?

The shadows do look off to me, but I'd have to see something like the Raw or original image -- these may be compression artifacts -- what software and compression settings are you using?

Damo77 wrote in post #13396406
Assuming you have Photoshop, try "Bicubic Smoother" in the Image Size dialog.

And then sharpen with a large radius, 3-4 px.

tonylong wrote in post #13396485
Maybe you could explain what you are referring to by "rasterized high contrast edges" -- are you referring to something about the edges of the skin or the edges of the shadows on the skin?

He means the area of contrast between the black background and the light part of the arm. This effect often happens with landscapes, where the boundary between the sky and land tends to look pixelated or oversharpened when you downsize and/or use too much sharpening.

The best thing to do here is to slightly blur the image before downsizing (2~3px Gaussian, depending on original image size), or at least blur the part that sticks out and then downsize. You really want to avoid sharpening any gradations between high-contrast objects, regardless of the subject matter.

Thanks all for the input. This was with a 40D, I'm going to try shooting with the 5DII and see if starting with a high res image helps.

Damo77 wrote in post #13396406
Assuming you have Photoshop, try "Bicubic Smoother" in the Image Size dialog.

I just tried that, marginally better. May be in combination with a couple of the suggestions below.

Master of Defenestration wrote in post #13396462
Can't really help much...But I just wanted to say...That's one cold mannequin.

It's winter

tonylong wrote in post #13396485
Maybe you could explain what you are referring to by "rasterized high contrast edges" -- are you referring to something about the edges of the skin or the edges of the shadows on the skin?

The shadows do look off to me, but I'd have to see something like the Raw or original image -- these may be compression artifacts -- what software and compression settings are you using?

It's along the right side of her upper right arm as it's contrasted with the background.

tzalman wrote in post #13396560
And then sharpen with a large radius, 3-4 px.

Neither of these have been sharpened, I'll give this a try.

Kolor-Pikker wrote in post #13396613
He means the area of contrast between the black background and the light part of the arm. This effect often happens with landscapes, where the boundary between the sky and land tends to look pixelated or oversharpened when you downsize and/or use too much sharpening.

The best thing to do here is to slightly blur the image before downsizing (2~3px Gaussian, depending on original image size), or at least blur the part that sticks out and then downsize. You really want to avoid sharpening any gradations between high-contrast objects, regardless of the subject matter.

This is had the most impact when I tried it. These are unsharpened.

POTN is the best. Great community!

The 5D2 has lower resolution; more pixels, but sensor resolution like the 30D.

tzalman wrote in post #13397175
The 5D2 has lower resolution; more pixels, but sensor resolution like the 30D.

My bad

Should have qualified, framed the same.