Pages

Jump to bottom

17 comments

1 researchok  Mon, Nov 12, 2012 3:47:32pm

You passed.

They look the same to me.

2 Daniel Ballard  Mon, Nov 12, 2012 3:48:47pm

re: #1 researchok

Heh, I think I need a more demanding source file. I'll start with one of the 25 meg RAW files from my 7D and see how that goes.

3 Interesting Times  Mon, Nov 12, 2012 4:08:08pm

re: #2 Daniel Ballard

My initial impression was that the PNG looks ever-so-slightly sharper. But not enough to justify its much larger file size vs the JPG, if you're thinking in terms of websites/bandwidth.

4 Randall Gross  Mon, Nov 12, 2012 4:24:58pm

Then there's DNG...

5 Skip Intro  Mon, Nov 12, 2012 4:25:48pm

To me, the color looks better on the jpeg.

6 Our Precious Bodily Fluids  Mon, Nov 12, 2012 5:24:59pm

Better shadow detail in the PNG.

7 darthstar  Mon, Nov 12, 2012 5:51:26pm

Can't tell the difference on my MacBook Pro with retina display. (apparently retina display means something good)

8 Charles Johnson  Mon, Nov 12, 2012 5:55:15pm

PNG is a lossless format, so it's always going to be much larger in file size. But by its nature it will also be as close to the original as possible.

For this kind of image, though, with a lot of color gradation, the visible difference is minuscule, especially if the JPEG is saved at a high quality, and the JPEG file will be a lot smaller.

PNG images really work much better with line art, or images with lots of solid colors. And the real advantage of PNG files, for web design anyway, is that they have a true alpha channel for transparency.

For putting photos on the web, JPEG is almost always going to be the better choice in terms of the tradeoff between file size and image quality.

9 darthstar  Mon, Nov 12, 2012 5:58:29pm

re: #8 Charles Johnson

I thought PNG was smaller than JPEG, even though it was a 'lossless' compression. Interesting.

10 Charles Johnson  Mon, Nov 12, 2012 6:01:12pm

re: #9 darthstar

I thought PNG was smaller than JPEG, even though it was a 'lossless' compression. Interesting.

PNG can be smaller than JPEG for some types of images, but for photographs almost never.

11 CuriousLurker  Mon, Nov 12, 2012 6:03:58pm

re: #9 darthstar

I thought PNG was smaller than JPEG, even though it was a 'lossless' compression. Interesting.

Ditto what CJ said.

Also, they're almost always smaller than GIFs when used for line art or images with large areas of flat color

12 Daniel Ballard  Mon, Nov 12, 2012 6:15:41pm

re: #8 Charles Johnson

Thank you for that, as long as I'm tuning images up for various formats, I figured to set one up for LGF.

And to share a little news-I hired a lady to make a wordpress blog for me with a e commerce retail front end so people can buy prints or high res digital files. Hopefully a retina display friendly site.

13 Gretchen G.Tiger  Mon, Nov 12, 2012 6:28:01pm

My only input is the the second image looks over-exposed.

:)

14 lostlakehiker  Mon, Nov 12, 2012 10:12:18pm

I vote for the top image. Put aside questions of file size. Just which looks better.

Slightly off topic? I had the opportunity once to walk up to a controlled, rather large natural gas fire. At closest approach, it was maybe 10 yards away, and filled much of my view.

That lasted less than two seconds, of course. Those things are hot. But the sight was unforgettable. Flames such as the one in the photo, when live and moving, are hypnotic and fascinating. "Towering Inferno" did its best to convey that. But the real thing is more impressive.

15 Mattand  Tue, Nov 13, 2012 5:31:47am

re: #13 Gretchen G.Tiger

My only input is the the second image looks over-exposed.

:)

Heh, I actually gravitated towards that one because it looked brighter.

I don't do as much web work as I should, but I have rarely encountered PNGs over the years. It's the default format for Apple's screenshots now, but that's about it. Any web wonks out there actually using it for real work?

16 Mattand  Tue, Nov 13, 2012 5:33:57am

re: #8 Charles Johnson

PNG is a lossless format, so it's always going to be much larger in file size. But by its nature it will also be as close to the original as possible.

For this kind of image, though, with a lot of color gradation, the visible difference is minuscule, especially if the JPEG is saved at a high quality, and the JPEG file will be a lot smaller.

PNG images really work much better with line art, or images with lots of solid colors. And the real advantage of PNG files, for web design anyway, is that they have a true alpha channel for transparency.

For putting photos on the web, JPEG is almost always going to be the better choice in terms of the tradeoff between file size and image quality.

IIRC, PNG is an open format as well, created in response to some licensing issues around the GIF format.

17 Daniel Ballard  Tue, Nov 13, 2012 9:58:30am

re: #14 lostlakehiker

FYI-That flame is from a 100,000 BTU blast furnace, with the lid removed just before the air fan spins up and adds oxygen and make the fire hotter and stay down in the furnace. For perspective that flame was about eight feet tall. I shot it at 1/8000th of a second shutter speed.
the furnace with the air boost reaches 2000F.


This page has been archived.
Comments are closed.

Jump to top

Create a PageThis is the LGF Pages posting bookmarklet. To use it, drag this button to your browser's bookmark bar, and title it 'LGF Pages' (or whatever you like). Then browse to a site you want to post, select some text on the page to use for a quote, click the bookmarklet, and the Pages posting window will appear with the title, text, and any embedded video or audio files already filled in, ready to go.
Or... you can just click this button to open the Pages posting window right away.
Last updated: 2016-01-01 10:29 am PST
LGF User's Guide RSS Feeds Tweet

Help support Little Green Footballs!

Subscribe now for ad-free access!Register and sign in to a free LGF account before subscribing, and your ad-free access will be automatically enabled.

Donate with
PayPal
Square Cash Shop at amazon
as an LGF Associate!
Recent PagesClick to refresh
Turkey to Stop Teaching Evolution in High School Istanbul, Turkey (CNN)Turkish high school students will no longer be taught the theory of evolution. The subject has been cut from the curriculum under changes made to eliminate "controversial" topics, the head of the national board of education, Alpaslan ...
Birth Control Works
2 hours, 19 minutes ago
Views: 150 • Comments: 0 • Rating: 0
Tweets: 1 • Share to Facebook
Shares: 0
Comments: 0
: 0
The Warped World of 1950’s Marriage Counselling (This article was previously written for the closed Yahoo group "Intertel Atheists" on September 27, 2014.) I am the manager of that Yahoo group, and the author of the article. Rights to articles at Intertel are retained by the ...
Anymouse 🌹
7 hours, 14 minutes ago
Views: 159 • Comments: 0 • Rating: 1
Tweets: 0 • Share to Facebook
Shares: 0
Comments: 0
: 0
Mad Men: Inside the Men’s Rights Movement—and the Army of Misogynists and Trolls It Spawned - Mother Jones On a balmy afternoon last June, dozens of demonstrators carrying “Stop the Violence” and “Rape is Rape” placards descended on the Hilton DoubleTree in downtown Detroit. They had come to protest the first-ever national gathering of the men’s rights ...
Birth Control Works
1 day, 1 hour ago
Views: 268 • Comments: 1 • Rating: 1
Tweets: 1 • Share to Facebook
Shares: 0
Comments: 0
: 0
Men Legally Allowed to Finish Sex Even if Woman Revokes Consent, NC Law States - Broadly ne May evening in 1977, Beverly Hester was sexually assaulted. According to the summary included in the North Carolina Supreme Court decision State v. Way, she testified that the perpetrator, Donnie Way, threatened to beat her if she didn't ...
Birth Control Works
1 day, 1 hour ago
Views: 250 • Comments: 0 • Rating: 0
Tweets: 2 • Share to Facebook
Shares: 0
Comments: 0
: 0
4 USAF Aircraft Destroyed or Damaged in a Week Thunderbirds F16 flipped when landing after their practice flight for Dayton Air Show. Two people hurt. 📷WHIO pic.twitter.com/LRcuVucKIm — Tom Podolec CTV News (@TomPodolec) June 23, 2017 A few days ago an F-16 crashed on takeoff at Ellington AFB, ...
Unshaken Defiance
1 day, 3 hours ago
Views: 256 • Comments: 0 • Rating: 0
Tweets: 3 • Share to Facebook
Shares: 0
Comments: 0
: 0
The Mets, Jets, and Dems; My Triumvirate of Lost Causesblog.timesunion.comFor pictures, click on the link above. The Mets, Jets, and Dems; my triumvirate of lost causesBy Rob Hoffman on June 26, 2017 at 5:53 AM0I’m in a slump. This is an undeniable fact, and not one of those alternative ...
rhoffman
2 days, 8 hours ago
Views: 298 • Comments: 1 • Rating: -3
Tweets: 2 • Share to Facebook
Shares: 1
Comments: 0
: 1
Why Are So Many Queer Girls in Juvie? The findings come out of years of research done by Angela Irvine and Aisha Canfield for the National Council on Crime and Delinquency (both now work at Impact Justice). For this particular statistic, they anonymously surveyed 1,400 girls in ...
Birth Control Works
2 days, 21 hours ago
Views: 290 • Comments: 0 • Rating: 0
Tweets: 0 • Share to Facebook
Shares: 0
Comments: 0
: 0
North Carolina Televangelist Indicted on Charges of Tax Crimes Coontz, 50, is described on his website as a "pastor, evangelist, television host, author, humanitarian, philanthropist, businessman." "a 2011 BMW, a 2011 Regal 2500 boat, a 2012 BMW convertible, a 2011 Lexus, a 2011 Land Rover, a 2006 Ferrari, ...
Tarkloon
3 days, 19 hours ago
Views: 359 • Comments: 1 • Rating: 2
Tweets: 1 • Share to Facebook
Shares: 1
Comments: 1
: 1
Isaac Asimov’s Best Arguments of All Time, Part One ➤ #Subscribe: goo.gl➤ Facebook: goo.gl➤ Twitter: goo.gl➤ Google+ : goo.gl➤ Site: goo.gl➤ Thanks for watching :) #Sciencetoday is channel uses for #education, #teaching, #review, #commentary, or research... If you have any issues with content, please contact us, for an ...
Tarkloon
3 days, 19 hours ago
Views: 359 • Comments: 1 • Rating: 4
Tweets: 0 • Share to Facebook
Shares: 1
Comments: 0
: 1
AWOLNATION - Hollow Moon (Bad Wolf) (Official Video) AWOLNATION's official video for "Hollow Moon (Bad Wolf)". Watch the new AWOLNATION video Run (Beautiful Things) - YouTube From AWOLNATION’s new album, ‘RUN’, available now at:iTunes - smarturl.it CDs, Vinyl + Bundles - smarturl.itGoogle Play - smarturl.it Stream ‘RUN’ ...
Tarkloon
3 days, 19 hours ago
Views: 268 • Comments: 0 • Rating: 1
Tweets: 0 • Share to Facebook
Shares: 0
Comments: 0
: 0