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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.


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.


Was it this video? https://www.youtube.com/watch?v=WXqVV8_GORE

He finds a solution involving copying files across from an older version of xcode


I believe Apple makes it difficult, but not impossible. At the end of the day, these things are specified in text files that can be edited, regardless of what options the GUI gives you. Definitely shame on Apple for trying to nudge developers to give up on older phones, but it aligns with their desire to keep their customers buying new phones.


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


r/Kindle is exploding with reports


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.


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.


I haven't head of Slickdeals, but wouldn't you still be under the terms of the line contract?

They aren't going to lose their money.


I got a similar deal; the phone was locked to tracfone (or one of the other verizon owned mvnos), no contract, just had to activate it and pay the first month's service. When the month was up, put it in a drawer. 60 days from activation, pull it from the drawer, connect to wifi, and it would unlock.


So Windows 12 is


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


In the video you show a 2D mask to blur diagonal lines. How is that mask applied to the DFT? Is the mask also converted to a DFT and the two signals get combined?


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


The last update for iPhone 8 was iOS 16.7.12 on 15 Sep 2025


Have you looked at the Mac Pro Rack version?


Yes, the base spec is another AU$1000 more expensive than the normal Mac Pro, and 3.7x the cost of the base Mac Studio in my country (despite having a processor two generations older)! That’s exactly what I’m complaining about in my comment!

What I’m talking about should be in the realm of 1.5x the cost of the Mac Studio.


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