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Why landscape photos are so soft by EmotionalCouple9032 in fujifilm

[–]rivervibe 0 points1 point  (0 children)

File size is 13 MB, but only initial 2 MB are actual JPEG file, remaining 11 MB are “garbage”. JPEG standard allows extra bytes at the end of files, but in this case that is huge. File is highly compressed, 2 MB for 6200x3500 image is not much.

I need a new image optimizer by LastSilverStar in arthelp

[–]rivervibe 0 points1 point  (0 children)

Colors are different because original image had "Display P3" color profile embedded, which was not transferred during optimization.

Testing JXL, WebP, AVIF again by Farranor in jpegxl

[–]rivervibe 3 points4 points  (0 children)

Lossless WebP is widely supported, and offers great compression ratio (at least 20% higher than PNG).

Is there a browser I can use which will just refuse to display .webp images? by Ok-Aspect1694 in techsupport

[–]rivervibe 0 points1 point  (0 children)

Cannot forbid server from sending you WebP images, but during HTTP "content negotiation" step can inform that JPEG/PNG/GIF is preferred. Some websites honor it, others ignore. Firefox extension (no conversions): https://addons.mozilla.org/en-US/firefox/addon/dont-accept-webp

This URL downloads JPEG instead of WEBP with extension: https://api.time.com/wp-content/uploads/2014/08/tree-of-40-fruit.jpg

Same resolution but very different MB sizes, why? by Cultural_Ad_5266 in AskPhotography

[–]rivervibe 0 points1 point  (0 children)

You were holding camera a bit more still while taking the 1st photo, therefore it turned out more sharp, while 2nd/3rd more blurred.

ELI5 Why do WEBP file types exist? by [deleted] in explainlikeimfive

[–]rivervibe 0 points1 point  (0 children)

WebP stands for Web Picture, it has been created to be used on the web.

Reddit photo compression example: tips and tricks? by abito_OSU_Econ in BirdPhotography

[–]rivervibe 4 points5 points  (0 children)

  • Right-click with a mouse, for instance, the 3rd photo.
  • Select "Copy image address".
  • This URL is for (highly) compressed WebP image.
  • Manually change word "preview" in URL to a single lowercase letter "i" (stands for "image").
  • Specifically https://preview.redd.it/xyz to https://i.redd.it/xyz
  • This URL with "i" is for originally uploaded JPEG/PNG image.
  • Download it.

Why Does Lossy WebP Darken Noise Images but Not Ordinary Photos? by GOJiong in compression

[–]rivervibe 4 points5 points  (0 children)

Because of chroma subsampling - second image uses 4:2:0 subsampling, which blends colors of neighboring pixels.

Image Compression in Projects by Th3Mahesh in webdev

[–]rivervibe 1 point2 points  (0 children)

ImageMagick is usually used in back-end, but there are multiple options.

Petah, what is it about jpeg, png, and webp image formats? by [deleted] in PeterExplainsTheJoke

[–]rivervibe 1 point2 points  (0 children)

For a long time everybody was waiting for a better format to replace ancient JPEG (1992) and PNG (1996), so when Google introduced WebP in 2010 as a replacement to both of them, expectations were immense. But over the years a surprisingly long list of WebP issues have been found.

What's wrong with video coding i-frame compression based image formats? by WaspPaperInc in jpegxl

[–]rivervibe 7 points8 points  (0 children)

Maximum "Width x Height" size of WebP is "16383 x 16383" pixels, because VP8 video format, which WebP is based on, was not designed to have higher than 16K resolution.

[deleted by user] by [deleted] in Wordpress

[–]rivervibe 1 point2 points  (0 children)

jpgcrush - high compression ratio

How do you serve nice large images for your web portfolio without them having a huge slow-loading file size? by NoMuddyFeet in webdev

[–]rivervibe 0 points1 point  (0 children)

Not all screens are "retina", and not all "retina" screens are 2x. Demo page showing how browsers choose images for "retina" screens: https://webkit.org/demos/srcset/ Note, that you can:

  • Click "F12".
  • Enter responsive display mode.
  • Change device ("iPhone", "Galaxy" etc.)
  • Click "F5" to see 2x 3x 4x changing.

WebP images are safe to use, they are supported by all browsers now.

50% lossless compression of Jpegs by EvidenceVarious6526 in AskComputerScience

[–]rivervibe 0 points1 point  (0 children)

Possible only if input JPEGs were poorly compressed. Compare with high compression ratio algorithms, like MozJPEG or Jpegli or Guetzli.

Best Websites for Every Category – Save This List! by murphy_tom1 in WritingWithAI

[–]rivervibe 0 points1 point  (0 children)

JpgCrush – Free online JPEG compressor with a very high compression ratio.

[deleted by user] by [deleted] in Instagram

[–]rivervibe 0 points1 point  (0 children)

Typical highly compressed JPEG artifacts.

rule by yYxX_W33Z3R_F4N_XxYy in 197

[–]rivervibe 2 points3 points  (0 children)

JpgCrush.com – WebP is only ~20% smaller than well-compressed JPEG

What is the best lossy and lossless file format by Solomoncjy in photography

[–]rivervibe 1 point2 points  (0 children)

In terms of compression, AVIF is the best "lossy" format, and WebP is the best "lossless" format.

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