Hacker News Board Hacker News, browsed like a classic message board
Live data from Hacker News

Show HN: Jpeg.io – Convert any major image format into a highly optimized JPEG

jpeg.io

Post reply on HN
Print view View original

11–20 of 88 posts

Re: Show HN: Jpeg.io – Convert any major image format into a highly optimized JPEG

#11

Post by VertexRed »

mcjiggerlog wrote: post #5

Really nice tool, but I'm not getting the best results in terms of size optimization so far: http://i.imgur.com/2lfx3P8.png I guess "highly optimized" is a rather ambiguous term. Maybe add a slider for quality compression?

Progressive jpgs increase the size

Re: Show HN: Jpeg.io – Convert any major image format into a highly optimized JPEG

#12

Post by Diti »

I am pretty sure “Kraken.io's proprietery JPEG optimization algorithms” is based on the Psychovisual Error Threeshold: http://ieeexplore.ieee.org/document/6530010/

Have a read at what Google engineer Colt McAnlis has to show about it: https://medium.com/@duhroach/reducing-jpg-file-size-e5b27df3...

Re: Show HN: Jpeg.io – Convert any major image format into a highly optimized JPEG

#15

Post by pwython »

Did a quick comparison test with this beautiful piece of artwork I just created.

original http://i.pi.gy/0K7d.png (2.1 MB)

jpeg.io http://i.pi.gy/AP8v.jpg (102 KB)

Photoshop 60% jpeg Export http://i.pi.gy/Wr4P.jpg (90 KB)

tinypng.com http://i.pi.gy/ndKA.png (74 KB)

Note pi.gy does not compress uploads.

Re: Show HN: Jpeg.io – Convert any major image format into a highly optimized JPEG

#16

Post by colmvp »

Kiro wrote: post #2

Cool. When would you want to use JPEG over PNG though? I don't know much about these things (just using PNG/SVG everywhere).

My rule of thumb: If the image has few colours, PNG is typically better as you can retain maximum quality with little degradation compared to JPG (e.g. a logo, an illustration). If the image is complex with a lot of colours/shades (e.g. a photograph, an illustration with dozens of colours), JPEG is typically better.

Re: Show HN: Jpeg.io – Convert any major image format into a highly optimized JPEG

#17

Post by karim79 »

pwython wrote: post #15

Did a quick comparison test with this beautiful piece of artwork I just created. original http://i.pi.gy/0K7d.png (2.1 MB) jpeg.io http://i.pi.gy/AP8v.jpg (102 KB) Photoshop 60% jpeg Export http://i.pi.gy/Wr4P.jpg (90 KB) tinypng.com http://i.pi.gy/ndKA.png (74 KB) Note pi.gy does not compress uploads.

I would note that tinypng is not converting it into a JPG, so that's not really a valid comparison - the result is quantized and dithered PNG (256 colours) and not a JPG.

Re: Show HN: Jpeg.io – Convert any major image format into a highly optimized JPEG

#19

Post by wscott »

pwython wrote: post #15

Did a quick comparison test with this beautiful piece of artwork I just created. original http://i.pi.gy/0K7d.png (2.1 MB) jpeg.io http://i.pi.gy/AP8v.jpg (102 KB) Photoshop 60% jpeg Export http://i.pi.gy/Wr4P.jpg (90 KB) tinypng.com http://i.pi.gy/ndKA.png (74 KB) Note pi.gy does not compress uploads.

Since he doesn't summarize the test above, let me. The jpeg.io result is bigger than the other two and noticeably worse quality. The problems were with the sharp lines.

Perhaps jpeg.io specializes in photo-realistic pictures rather than graphics and logos.

Re: Show HN: Jpeg.io – Convert any major image format into a highly optimized JPEG

#20

Post by iplaw »

pwython wrote: post #15

Did a quick comparison test with this beautiful piece of artwork I just created. original http://i.pi.gy/0K7d.png (2.1 MB) jpeg.io http://i.pi.gy/AP8v.jpg (102 KB) Photoshop 60% jpeg Export http://i.pi.gy/Wr4P.jpg (90 KB) tinypng.com http://i.pi.gy/ndKA.png (74 KB) Note pi.gy does not compress uploads.

I would also note that the Photoshop export has very visible artifacting, and the tinypng compression killed the gradient. For the minimal size trade-off, the jpeg.io compression takes the W.
Post reply on HN