Is the web allergic to JPG?
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I'm not making a web browser. I need bare minimum functionality. This isn't a Cortex-A I'm targeting. :)
To err is human. Fortune favors the monsters.
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Quote:
I'm not making a web browser.
Not at the moment... But all the stuff I'm reading from you, there is a chance that you develop a web browser for ATTINY85 or similars ;P :laugh:
Okay, I deserved that. :laugh:
To err is human. Fortune favors the monsters.
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I was going to make a small demo of loading a jpg from the web and consuming it on an ESP32 The image should be small (320x240 ish) because i can't resize it, it should be retrievable by an end user for verification and hopefully it would be a prominent recognizable figure on the web. Here's what I've checked: Code Project's logo (gif) Google's logo (png) Twitter (png, and huge) Reddit (not easily retrievable) Github (not easily retrievable) Youtube (not easily retrievable) Here's what I don't want to promote - even by way of a demo: Microsoft Facebook I feel like maybe I have some tunnel vision. Surely there is site with a prominent logo in jpg that's easily accessible from a browser, no? Am I being unrealistic? Should I implement png? (I really don't want to for reasons)
To err is human. Fortune favors the monsters.
Why limit yourself to a logo? Using a company logo has drawbacks anyway, such as legal copyright etc., or implications of involvement with the company (as you suggest by not wishing to use Microsoft or Facebook examples). Why not choose a public domain image of a recognisable landmark or figure, or even take your own photo of such a thing and host it on the web (thus avoiding any IP issues)? (Finding small JPGs is likely to be a hard task anyway since for small images, there is often little benefit in using JPG compression - it just results in ugly artefacts if compression is high and no advantage if compression is low. It's larger images where JPG comes into its own, really...)
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Yeah, but they're not geared for IoT. I had to gut the truetype stuff to make it all work from a stream instead of RAM. I wound up changing most of that file. I don't want to go through the same thing with the PNG loading. I'd like to look for a different source - preferably something that loads it progressively. The STB stuff is PC gaming code so it's geared for having gobs of RAM.
To err is human. Fortune favors the monsters.
honey the codewitch wrote:
I'd like to look for a different source - preferably something that loads it progressively.
I just glanced over the PNG spec and progressive decoding only works on PNG images that were 'progressive encoded'. I think that means multiple IDAT sections. With a normal (non-progressive) PNG having a single IDAT. So you would only benefit here if you control the image encoding too. Progressive encoded PNG images are rare today from my understanding.
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I was going to make a small demo of loading a jpg from the web and consuming it on an ESP32 The image should be small (320x240 ish) because i can't resize it, it should be retrievable by an end user for verification and hopefully it would be a prominent recognizable figure on the web. Here's what I've checked: Code Project's logo (gif) Google's logo (png) Twitter (png, and huge) Reddit (not easily retrievable) Github (not easily retrievable) Youtube (not easily retrievable) Here's what I don't want to promote - even by way of a demo: Microsoft Facebook I feel like maybe I have some tunnel vision. Surely there is site with a prominent logo in jpg that's easily accessible from a browser, no? Am I being unrealistic? Should I implement png? (I really don't want to for reasons)
To err is human. Fortune favors the monsters.
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honey the codewitch wrote:
I'd like to look for a different source - preferably something that loads it progressively.
I just glanced over the PNG spec and progressive decoding only works on PNG images that were 'progressive encoded'. I think that means multiple IDAT sections. With a normal (non-progressive) PNG having a single IDAT. So you would only benefit here if you control the image encoding too. Progressive encoded PNG images are rare today from my understanding.
I think I can still do it line by line
To err is human. Fortune favors the monsters.
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Why limit yourself to a logo? Using a company logo has drawbacks anyway, such as legal copyright etc., or implications of involvement with the company (as you suggest by not wishing to use Microsoft or Facebook examples). Why not choose a public domain image of a recognisable landmark or figure, or even take your own photo of such a thing and host it on the web (thus avoiding any IP issues)? (Finding small JPGs is likely to be a hard task anyway since for small images, there is often little benefit in using JPG compression - it just results in ugly artefacts if compression is high and no advantage if compression is low. It's larger images where JPG comes into its own, really...)
viewing an image over the web does not violate copyright laws, even if the viewer is an IoT device.
To err is human. Fortune favors the monsters.
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I was going to make a small demo of loading a jpg from the web and consuming it on an ESP32 The image should be small (320x240 ish) because i can't resize it, it should be retrievable by an end user for verification and hopefully it would be a prominent recognizable figure on the web. Here's what I've checked: Code Project's logo (gif) Google's logo (png) Twitter (png, and huge) Reddit (not easily retrievable) Github (not easily retrievable) Youtube (not easily retrievable) Here's what I don't want to promote - even by way of a demo: Microsoft Facebook I feel like maybe I have some tunnel vision. Surely there is site with a prominent logo in jpg that's easily accessible from a browser, no? Am I being unrealistic? Should I implement png? (I really don't want to for reasons)
To err is human. Fortune favors the monsters.
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I think I can still do it line by line
To err is human. Fortune favors the monsters.
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Sweet, Can you point out which step in decoding PNG images uses lines? I'd like to see how it's done. Here's an overview[^], show me which decoding step uses lines.
I couldn't say off hand. I was looking at some code on github some months back on doing this.
To err is human. Fortune favors the monsters.
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I was going to make a small demo of loading a jpg from the web and consuming it on an ESP32 The image should be small (320x240 ish) because i can't resize it, it should be retrievable by an end user for verification and hopefully it would be a prominent recognizable figure on the web. Here's what I've checked: Code Project's logo (gif) Google's logo (png) Twitter (png, and huge) Reddit (not easily retrievable) Github (not easily retrievable) Youtube (not easily retrievable) Here's what I don't want to promote - even by way of a demo: Microsoft Facebook I feel like maybe I have some tunnel vision. Surely there is site with a prominent logo in jpg that's easily accessible from a browser, no? Am I being unrealistic? Should I implement png? (I really don't want to for reasons)
To err is human. Fortune favors the monsters.
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I was going to make a small demo of loading a jpg from the web and consuming it on an ESP32 The image should be small (320x240 ish) because i can't resize it, it should be retrievable by an end user for verification and hopefully it would be a prominent recognizable figure on the web. Here's what I've checked: Code Project's logo (gif) Google's logo (png) Twitter (png, and huge) Reddit (not easily retrievable) Github (not easily retrievable) Youtube (not easily retrievable) Here's what I don't want to promote - even by way of a demo: Microsoft Facebook I feel like maybe I have some tunnel vision. Surely there is site with a prominent logo in jpg that's easily accessible from a browser, no? Am I being unrealistic? Should I implement png? (I really don't want to for reasons)
To err is human. Fortune favors the monsters.
Jpg is filth.
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viewing an image over the web does not violate copyright laws, even if the viewer is an IoT device.
To err is human. Fortune favors the monsters.
True, but if you (say) use the Coca-Cola logo and advise people to view said logo on your device (even as a proof-of-concept) there's the risk that Coca-Cola will complain (fair use, passing-off, trademark etc) or demand you include a copyright / trademark notice. If you're aiming to have an instantly-recognisable logo, companies of that size/fame can be a bit tetchy about how their logo is used. Very unlikely, true, but possible. But for those same reasons of control and wanting a "perfect" viewing experience, they're unlikely to have a .JPG logo anyway.
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I was going to make a small demo of loading a jpg from the web and consuming it on an ESP32 The image should be small (320x240 ish) because i can't resize it, it should be retrievable by an end user for verification and hopefully it would be a prominent recognizable figure on the web. Here's what I've checked: Code Project's logo (gif) Google's logo (png) Twitter (png, and huge) Reddit (not easily retrievable) Github (not easily retrievable) Youtube (not easily retrievable) Here's what I don't want to promote - even by way of a demo: Microsoft Facebook I feel like maybe I have some tunnel vision. Surely there is site with a prominent logo in jpg that's easily accessible from a browser, no? Am I being unrealistic? Should I implement png? (I really don't want to for reasons)
To err is human. Fortune favors the monsters.
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I was going to make a small demo of loading a jpg from the web and consuming it on an ESP32 The image should be small (320x240 ish) because i can't resize it, it should be retrievable by an end user for verification and hopefully it would be a prominent recognizable figure on the web. Here's what I've checked: Code Project's logo (gif) Google's logo (png) Twitter (png, and huge) Reddit (not easily retrievable) Github (not easily retrievable) Youtube (not easily retrievable) Here's what I don't want to promote - even by way of a demo: Microsoft Facebook I feel like maybe I have some tunnel vision. Surely there is site with a prominent logo in jpg that's easily accessible from a browser, no? Am I being unrealistic? Should I implement png? (I really don't want to for reasons)
To err is human. Fortune favors the monsters.
Corporate logos tend to be lossless so they can be displayed in their maximum quality.
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I was going to make a small demo of loading a jpg from the web and consuming it on an ESP32 The image should be small (320x240 ish) because i can't resize it, it should be retrievable by an end user for verification and hopefully it would be a prominent recognizable figure on the web. Here's what I've checked: Code Project's logo (gif) Google's logo (png) Twitter (png, and huge) Reddit (not easily retrievable) Github (not easily retrievable) Youtube (not easily retrievable) Here's what I don't want to promote - even by way of a demo: Microsoft Facebook I feel like maybe I have some tunnel vision. Surely there is site with a prominent logo in jpg that's easily accessible from a browser, no? Am I being unrealistic? Should I implement png? (I really don't want to for reasons)
To err is human. Fortune favors the monsters.
Stock Images, Royalty-Free Pictures, Illustrations & Videos - iStock[^] It has a nice collection of jpegs. But can't say progressive loading or interlaced.
With Warm Regards, Amol.
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I was going to make a small demo of loading a jpg from the web and consuming it on an ESP32 The image should be small (320x240 ish) because i can't resize it, it should be retrievable by an end user for verification and hopefully it would be a prominent recognizable figure on the web. Here's what I've checked: Code Project's logo (gif) Google's logo (png) Twitter (png, and huge) Reddit (not easily retrievable) Github (not easily retrievable) Youtube (not easily retrievable) Here's what I don't want to promote - even by way of a demo: Microsoft Facebook I feel like maybe I have some tunnel vision. Surely there is site with a prominent logo in jpg that's easily accessible from a browser, no? Am I being unrealistic? Should I implement png? (I really don't want to for reasons)
To err is human. Fortune favors the monsters.
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True, but if you (say) use the Coca-Cola logo and advise people to view said logo on your device (even as a proof-of-concept) there's the risk that Coca-Cola will complain (fair use, passing-off, trademark etc) or demand you include a copyright / trademark notice. If you're aiming to have an instantly-recognisable logo, companies of that size/fame can be a bit tetchy about how their logo is used. Very unlikely, true, but possible. But for those same reasons of control and wanting a "perfect" viewing experience, they're unlikely to have a .JPG logo anyway.
Pretty sure Coca-Cola isn't going to come after me for a sample project. I'll risk it. :laugh:
To err is human. Fortune favors the monsters.
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I expect them to know when to use JPEG and when not to use it, and clearly they do... And that is somehow funny? Why? PNG and JPEG are very different formats, and in most cases it is clear which one to use. Try to load the PNG they have into paint or whatever you have, then save it as JPEG. Now load the JPEG and zoom in on the high contrast ares - like around text. Now you know when not to choose JPEG. Similar try taking a JPEG photo of nature in good quality and save it as PNG (or better, a raw image saved in both if you have a camera that can store raw images). Look at the file size compared to the perceived quality. Now you know when not to choose PNG. Of course there are cased in-between - photos that for example contains a sign with text. Then you have to choose one or the other, with the downside it brings.