Hacker News: seam_carver

New comment by seam_carver in "Show HN: Kindling – reverse-engineered kindlegen, ~7,000x faster in Rust"

seam_carver — Tue, 07 Apr 2026 18:21:15 +0000

This is good stuff, hopefully kindlegen becomes native in macOS 28

New comment by seam_carver in "Kindle to end store downloads and registering for 1st-5th gen kindles in May"

seam_carver — Tue, 07 Apr 2026 17:58:09 +0000

Side tangent: I’m the developer of Kindle Comic Converter. Kindle updates 5.19.2+ have completely broken the sideloaded manga reader with bugs like huge margins, pages being on the wrong side in 2 page landscape mode, no panel view, no % read tracker, and laggy page turns. I’ve documented the problems here and the first report was 50 days ago. https://youtu.be/Eo6K7omlE7g

And I haven’t even touched all the problems with normal sideloaded books like broken embedded/publisher fonts.

Kindle settings > help > contact us > email if you want to voice complaints.

Kindle to end store downloads and registering for 1st-5th gen kindles in May

seam_carver — Tue, 07 Apr 2026 17:05:25 +0000

Article URL: https://www.reddit.com/r/kindle/s/xg8uCdAWU3

Comments URL: https://news.ycombinator.com/item?id=47678320

Points: 53

# Comments: 53

Latest Kindle updates cause gigabytes of data upload during sleep, battery drain

seam_carver — Sun, 05 Apr 2026 23:40:07 +0000

Article URL: https://old.reddit.com/r/kindle/comments/1sbmiee/kindle_uploading_gigabytes_while_it_sleeps/

Comments URL: https://news.ycombinator.com/item?id=47655114

Points: 3

# Comments: 0

Amazon pulled Kindle update 5.19.3 a few days after release

seam_carver — Tue, 31 Mar 2026 20:44:51 +0000

Article URL: https://old.reddit.com/r/kindle/comments/1s7lo50/5193_officially_back_to_5192_on_kindle_website/

Comments URL: https://news.ycombinator.com/item?id=47593248

Points: 2

# Comments: 0

Kindle update 5.19.2 is the worst Kindle update of all time IMO

seam_carver — Thu, 26 Mar 2026 15:26:48 +0000

I've seen around 30+ reports of this on Reddit since Feb. 21 2026. Regarding usb loaded/sideloaded AZW3 books I've seen these problems reported:

1) Page numbers don’t work

2) % read tracker doesn’t work, always said Read 100%

3) Painfully slow page turns

4) huge margins on fixed layout manga/comics at the top and bottom of the screen, which the community calls "death margins"

(Another 5.19.2 bug where a "Storage is full" error would constantly appear was apparently fixed rather quickly though. Maybe Amazon prioritized bugs that don't affect sideloaded books?)

And apparently logging out of the Amazon account on the Kindle fixes all the problems. But logging back in the problem returns. And some users reported that making a new Amazon account and logging in with that also fixes the problem.

Not everyone will experience the problem, Amazon can remotely activate features so it's possible the "feature" hasn't been activated for you yet.

Sideloading KFX format books doesn't seem to be affected.

Here are some reddit comments quoting amazon customer service I've seen, take them with a grain of salt since these are just reddit comments:

"I fully understand your frustration. It’s true that reading manga or comics requires a full-screen display to be comfortable. I can confirm that we have received several reports regarding these unusual white margins (sometimes referred to as ‘death margins’ by the community) which appeared specifically with update 5.19.2. I am passing on your specific case to our Kindle development team."

I also read another reddit comment that stated that most of the relevant Amazon team at Lab126 was laid off and the remainder are vibing.

Comments URL: https://news.ycombinator.com/item?id=47531696

Points: 4

# Comments: 0

New comment by seam_carver in "2D Discrete Fourier Transform fixes rainbows on manga on color eInk Kaleido 3"

seam_carver — Mon, 23 Mar 2026 16:02:53 +0000

An interesting application of the 2D DFT to manga on color eink Kaleido 3 with math theory explained! Kobo Colour images.

Most of the slides are based on the DFT chapter in Digital Image Processing: A Practical Approach by Nick Efford. I learned DFT to understand this algorithm.

2D Discrete Fourier Transform fixes rainbows on manga on color eInk Kaleido 3

seam_carver — Mon, 23 Mar 2026 16:02:53 +0000

Article URL: https://www.youtube.com/watch?v=Dw2HTJCGMhw

Comments URL: https://news.ycombinator.com/item?id=47491335

Points: 2

# Comments: 1

New comment by seam_carver in "Apple releases iOS 15.8.7 to fix Coruna exploit for iPhone 6S from 2015"

seam_carver — Thu, 12 Mar 2026 07:50:26 +0000

I think I saw a YouTube video where some developer said that Apple requires you to use latest version of Xcode, that version has a minimum SDK (I think iOS 15) and he was complaining he couldn't update his iOS 12 targetting app anymore.

New comment by seam_carver in "Apple releases iOS 15.8.7 to fix Coruna exploit for iPhone 6S from 2015"

seam_carver — Thu, 12 Mar 2026 02:30:01 +0000

Available for:

iPhone 6s (all models), iPhone 7 (all models), iPhone SE (1st generation), iPad Air 2, iPad mini (4th generation), and iPod touch (7th generation)

iOS 16.7.15 and iPadOS 16.7.15: iPhone 8, iPhone 8 Plus, iPhone X, iPad 5th generation, iPad Pro 9.7-inch, and iPad Pro 12.9-inch 1st generation

Apple releases iOS 15.8.7 to fix Coruna exploit for iPhone 6S from 2015

seam_carver — Thu, 12 Mar 2026 01:22:26 +0000

Article URL: https://support.apple.com/en-us/126632

Comments URL: https://news.ycombinator.com/item?id=47345050

Points: 111

# Comments: 52

Kindle update 5.19.2 broke sideloaded books/manga/comics AZW3

seam_carver — Fri, 06 Mar 2026 17:10:05 +0000

I've seen around 30+ reports of this on Reddit since Feb. 21 2026.

Regarding usb loaded/sideloaded AZW3 books I've seen these problems reported:

1) Page numbers don’t work

2) % read tracker doesn’t work, always said Read 100%

3) Painfully slow page turns

4) huge margins on manga/comics at the top and bottom of the screen.

(Another 5.19.2 bug where a "Storage is full" error would constantly appear was apparently fixed rather quickly though.)

And apparently logging out of the Amazon account on the Kindle fixes all the problems.

Not everyone will experience the problem, Amazon can remotely activate features so it's possible the "feature" hasn't been activated for you yet.

Sideloading KFX format books doesn't seem to be affected.

Comments URL: https://news.ycombinator.com/item?id=47277857

Points: 3

# Comments: 0

New comment by seam_carver in "Amazon Books Are Down"

seam_carver — Thu, 05 Mar 2026 20:30:09 +0000

r/Kindle is exploding with reports

Show HN: Discrete Fourier Transform on color eInk manga fixes rainbows [video]

seam_carver — Mon, 09 Feb 2026 16:05:19 +0000

An interesting application of the 2D DFT to manga on color eink Kaleido 3 with math theory explained! Kobo Colour images. Most of the slides are based on the DFT chapter in Digital Image Processing: A Practical Approach by Nick Efford. I learned DFT to understand this algorithm.

Comments URL: https://news.ycombinator.com/item?id=46946732

Points: 1

# Comments: 0

New comment by seam_carver in "Using the 2D discrete Fourier transform to fix rainbows in manga on color eInk"

seam_carver — Fri, 30 Jan 2026 17:13:58 +0000

An interesting application of the 2D DFT to manga on color eink Kaleido 3 with math theory explained! Kobo Colour images.

Most of the slides are based on the DFT chapter in Digital Image Processing: A Practical Approach by Nick Efford. I learned DFT to understand this algorithm.

Using the 2D discrete Fourier transform to fix rainbows in manga on color eInk

seam_carver — Fri, 30 Jan 2026 17:13:58 +0000

Article URL: https://www.youtube.com/watch?v=Dw2HTJCGMhw

Comments URL: https://news.ycombinator.com/item?id=46827014

Points: 2

# Comments: 2

New comment by seam_carver in "Verizon starts requiring 365 days of paid service before it will unlock phones"

seam_carver — Wed, 21 Jan 2026 04:31:27 +0000

On Slickdeals, the 60 day unlock after paying for one month of service was often used for locked phones like the $49 iPhone SE. This prevents that.

New comment by seam_carver in "Microsoft denies rewriting Windows 11 in Rust using AI"

seam_carver — Thu, 25 Dec 2025 05:28:57 +0000

So Windows 12 is

New comment by seam_carver in "An Interactive Guide to the Fourier Transform"

seam_carver — Mon, 08 Dec 2025 02:41:44 +0000

Just remove anything under the mask basically, similar to a low pass filter.

New comment by seam_carver in "An Interactive Guide to the Fourier Transform"

seam_carver — Sun, 07 Dec 2025 22:54:31 +0000

If anyone wants to learn about the 2D DFT, the best explanation I've ever read was the relevant chapter in Digital Image Processing by Nick Efford.

If anyone wants to see my favorite application of the 2D DFT, I made a video of how the DFT is used to remove rainbows in manga on Kaleido 3 color eink on Kobo Colour:

https://youtu.be/Dw2HTJCGMhw?si=J6dUYOj2IRX1nPRF