TransparantQR - Revision history

Cmpxchg at 20:07, 27 April 2022

2022-04-27T20:07:55Z

← Older revision		Revision as of 20:07, 27 April 2022
Line 35:		Line 35:
	Additional changes:		Additional changes:
	Reduce location_ishiconstrast() remove the line 6 tests for even more area, seems to be allowed on most phone-based QR readers.		Reduce location_ishiconstrast() remove the line 6 tests for even more area, seems to be allowed on most phone-based QR readers.

			=== User interface ===

			qrencode -o out.png -T insertyoururlorotherdatahere

			will output a PNG32 file out.png

			=== Building ===

	building yourself:		building yourself:
	git clone https://git.sr.ht/~cmpxchgable/libqrencode		git clone https://git.sr.ht/~cmpxchgable/libqrencode
			and follow same instructions as original

	=== Sample image ===		=== Sample image ===
	Below transparent, PNG32 format file can be overlayed on any graphic and redirects to http://revspace.nl/		Below transparent, PNG32 format file can be overlayed on any graphic and redirects to http://revspace.nl/
	[[File:RevspaceTransparentQRLink.png\|thumb\|RevspaceTransparentQRLink]]		[[File:RevspaceTransparentQRLink.png\|thumb\|RevspaceTransparentQRLink]]

Cmpxchg at 20:05, 27 April 2022

2022-04-27T20:05:56Z

← Older revision		Revision as of 20:05, 27 April 2022
Line 7:		Line 7:
	}}		}}

	Based on an idea of Zack Freedman [https://twitter.com/zackfreedman/status/1517555638456389632 twitter link]~~, but then~~ with full-color video ~~background possible~~.		=== Origin ===

			Based on an idea of Zack Freedman [https://twitter.com/zackfreedman/status/1517555638456389632 twitter link]

			=== Improvement ===

			Make it work with a full-color moving video in the back.
			* Use same large markers
			* Make them a little more transparent (25%)
			* With contrast of the large markers, reader will construct lines along which the blocks are sample
			* Reduce size of blocks to about 1/9th of original blocksize
			* Make everything around the block transparent
			* Result: working transparent QR code!

	Does not work on all readers, zbarimg fails on the PNG, but could be due to PNG alpha		Does not work on all readers, zbarimg fails on the PNG, but could be due to PNG alpha
	channel interpreted in the wrong way.		channel interpreted in the wrong way.

			=== Resulting code distribution ===

	It is a patch to GPL code, so modified source must be published.		It is a patch to GPL code, so modified source must be published.
Line 21:		Line 36:
	Reduce location_ishiconstrast() remove the line 6 tests for even more area, seems to be allowed on most phone-based QR readers.		Reduce location_ishiconstrast() remove the line 6 tests for even more area, seems to be allowed on most phone-based QR readers.

			building yourself:
			git clone https://git.sr.ht/~cmpxchgable/libqrencode

	Sample image.		=== Sample image ===
	Below transparent, PNG32 format file can be overlayed on any graphic and redirects to http://revspace.nl/		Below transparent, PNG32 format file can be overlayed on any graphic and redirects to http://revspace.nl/
	[[File:RevspaceTransparentQRLink.png\|thumb\|RevspaceTransparentQRLink]]		[[File:RevspaceTransparentQRLink.png\|thumb\|RevspaceTransparentQRLink]]

Cmpxchg at 16:35, 27 April 2022

2022-04-27T16:35:27Z

← Older revision		Revision as of 16:35, 27 April 2022
Line 1:		Line 1:
	{{Project		{{Project
	\|Name=TransparantQR		\|Name=TransparantQR
	\|Picture=~~Qrtest2~~.png		\|Picture=QrTest2.png
	\|Omschrijving=Transparant QR code		\|Omschrijving=Transparant QR code
	\|Status=Completed		\|Status=Completed

Cmpxchg at 16:34, 27 April 2022

2022-04-27T16:34:29Z

← Older revision		Revision as of 16:34, 27 April 2022
Line 1:		Line 1:
	{{Project		{{Project
	\|Name=TransparantQR		\|Name=TransparantQR
	\|Picture=~~Qrtest~~.png		\|Picture=Qrtest2.png
	\|Omschrijving=Transparant QR code		\|Omschrijving=Transparant QR code
	\|Status=Completed		\|Status=Completed

Cmpxchg at 07:57, 25 April 2022

2022-04-25T07:57:53Z

← Older revision		Revision as of 07:57, 25 April 2022
Line 20:		Line 20:
	Additional changes:		Additional changes:
	Reduce location_ishiconstrast() remove the line 6 tests for even more area, seems to be allowed on most phone-based QR readers.		Reduce location_ishiconstrast() remove the line 6 tests for even more area, seems to be allowed on most phone-based QR readers.


			Sample image.
			Below transparent, PNG32 format file can be overlayed on any graphic and redirects to http://revspace.nl/
			[[File:RevspaceTransparentQRLink.png\|thumb\|RevspaceTransparentQRLink]]

Cmpxchg at 07:44, 25 April 2022

2022-04-25T07:44:42Z

← Older revision		Revision as of 07:44, 25 April 2022
Line 7:		Line 7:
	}}		}}

	Based on an idea of Zack ~~Freeman~~ [https://twitter.com/zackfreedman/status/1517555638456389632 twitter link], but then with full-color video background possible.		Based on an idea of Zack Freedman [https://twitter.com/zackfreedman/status/1517555638456389632 twitter link], but then with full-color video background possible.
	Does not work on all readers, zbarimg fails on the PNG, but could be due to PNG alpha		Does not work on all readers, zbarimg fails on the PNG, but could be due to PNG alpha
	channel interpreted in the wrong way.		channel interpreted in the wrong way.

			It is a patch to GPL code, so modified source must be published.
			For convenience, patch file is encoded in QR as well.
			Commit message redacted and reduced, xz compression, and it fits!

	Sourcecode patch to libqrencode: (xz compressed patchfile)		Sourcecode patch to libqrencode: (xz compressed patchfile)
	[[File:TransparentQRPatch.png\|thumb\|patch]]		[[File:TransparentQRPatch.png\|thumb\|patch]]

			Additional changes:
			Reduce location_ishiconstrast() remove the line 6 tests for even more area, seems to be allowed on most phone-based QR readers.

Cmpxchg: add patch

2022-04-25T07:37:29Z

add patch

← Older revision		Revision as of 07:37, 25 April 2022
Line 11:		Line 11:
	channel interpreted in the wrong way.		channel interpreted in the wrong way.

	Sourcecode patch to ~~be available as QR code in PNG~~.		Sourcecode patch to libqrencode: (xz compressed patchfile)
			[[File:TransparentQRPatch.png\|thumb\|patch]]

Cmpxchg at 22:33, 24 April 2022

2022-04-24T22:33:25Z

← Older revision		Revision as of 22:33, 24 April 2022
Line 11:		Line 11:
	channel interpreted in the wrong way.		channel interpreted in the wrong way.

	Sourcecode patch available as QR code in PNG.		Sourcecode patch to be available as QR code in PNG.

Cmpxchg at 22:20, 24 April 2022

2022-04-24T22:20:39Z

← Older revision		Revision as of 22:20, 24 April 2022
Line 7:		Line 7:
	}}		}}

	Based on an idea of Zack Freeman, but then with full-color video background possible.		Based on an idea of Zack Freeman [https://twitter.com/zackfreedman/status/1517555638456389632 twitter link], but then with full-color video background possible.
	Does not work on all readers, zbarimg fails on the PNG, but could be due to PNG alpha		Does not work on all readers, zbarimg fails on the PNG, but could be due to PNG alpha
	channel interpreted in the wrong way.		channel interpreted in the wrong way.

	~~Patch to be attached~~ as ~~soon it can be fit into an~~ QR code.		Sourcecode patch available as QR code in PNG.

Cmpxchg at 22:17, 24 April 2022

2022-04-24T22:17:59Z

← Older revision		Revision as of 22:17, 24 April 2022
Line 11:		Line 11:
	channel interpreted in the wrong way.		channel interpreted in the wrong way.

	Patch attached.		Patch to be attached as soon it can be fit into an QR code.