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Author SHA1 Message Date
YAMAMOTO Takashi
f1dd37fbdb quirc_resize: Make this a bit more careful about integer overflows 
Also, avoid malloc(0), which is not too portable.
 2021-05-11 11:05:58 +09:00
YAMAMOTO Takashi
772cd3e73f Improve stack usage for flood filling 
* Make flood filling logic iterative (vs recursive)
  I basically tried one-to-one conversions here to avoid mistakes.
  probably it has a room for later optimizations.

* Use explicit malloc (vs variables on stack) to allocate the work area.

* Estimate the amount of memory for the work area dynamically
  from the image size, instead of using a constant FLOOD_FILL_MAX_DEPTH,
  which is too big in the most cases.
 2021-05-11 11:05:58 +09:00
Daniel Beer
c6fc67088a
Merge pull request #103 from yamt/otsu 
Fix possible overflows in otsu()
 2021-05-11 13:24:56 +12:00
Daniel Beer
e43a33bbc4 Add name of license to LICENSE file. 2021-05-11 10:34:42 +12:00
Daniel Beer
db49540f36
Merge pull request #107 from yamt/shrink-datastream 
Shrink struct datastream by borrowing the user buffer
 2021-05-11 10:30:58 +12:00
Daniel Beer
fd7792177e
Merge pull request #106 from yamt/finder_scan 
finder_scan: Improve capstone detection on small images
 2021-05-11 10:28:03 +12:00
Alexandre Perrin
121d685617
Merge pull request #101 from yamt/doc-make 
README.md: document requirement on make command
 2021-05-02 21:53:32 +02:00
YAMAMOTO Takashi
21b7581b04 Shrink struct datastream by borrowing the user buffer 2021-04-23 13:40:37 +09:00
YAMAMOTO Takashi
65379a7c39 finder_scan: Improve capstone detection on small images 
When using small captured images, I somehow frequently see failures
to recognize a capstone due to rounding errors.
eg. when pb[] = {2 3 8 3 2}.

This commit tries to improve it by using fixed-point arithmetics.
The scaling factor was chosen somehow arbitrary. A moderate scaling
should be enough.
 2021-04-23 10:36:22 +09:00
YAMAMOTO Takashi
734258c775 finder_scan: constify the "check" array 2021-04-23 10:36:22 +09:00
YAMAMOTO Takashi
02ed1066ba test_grouping: use unsigned variables where it makes more sense 2021-04-23 10:36:22 +09:00
YAMAMOTO Takashi
6fb24d26c8 README.md: document requirement on make command 2021-04-17 22:35:46 +09:00
Alexandre Perrin
ed455904f3
Merge pull request #102 from yamt/readme-quirc-demo-opencv 
Update for quirc-demo-opencv and dependencies
 2021-04-16 20:38:38 +02:00
YAMAMOTO Takashi
ea9b6ee5ef otsu: Use unsigned for the pixel numbers 
Because singed numbers don't make sense here.
 2021-04-08 13:38:30 +09:00
YAMAMOTO Takashi
de68db7b69 otsu: Use double for weighted sums 
My phone camera produces 12M-pixel images.
They can easily overflow an int.
 2021-04-08 13:38:30 +09:00
YAMAMOTO Takashi
a3623ea4f4 README.md: Update extra dependencies for each programs 2021-04-08 09:49:14 +09:00
YAMAMOTO Takashi
ef1b97015e Makefile: quirc-demo-opencv doesn't use libjpeg 2021-04-08 09:49:14 +09:00
YAMAMOTO Takashi
a2b1358580 README.md: Update for quirc-demo-opencv 2021-04-08 09:49:11 +09:00
Alexandre Perrin
9c0f555acb
Merge pull request #94 from yamt/demo-opencv 
quirc-demo-opencv: Add OpenCV version of the demo
 2021-03-28 21:00:08 +02:00
Alexandre Perrin
7ef51ee6e7
Merge pull request #97 from yamt/readme-demo 
README.md: mention requirements of each test/demo
 2021-03-28 20:59:30 +02:00
YAMAMOTO Takashi
f10e7dc39a README.md: mention requirements of each test/demo 2021-03-23 09:08:51 +09:00
YAMAMOTO Takashi
679e43f144 quirc-demo-opencv: Add OpenCV version of the demo 
My motivation is to experiment quirc on macOS, where
neither of SDL1 or V4L2 work.

```
% brew install opencv
% brew install pkg-config
% brew install bsdmake
% bsdmake quirc-demo-opencv
% ./quirc-demo-opencv
```

Note: the macOS version of GNU make (/usr/bin/make) is a bit old
for quirc's Makefile.
 2021-03-22 10:13:33 +09:00
Alexandre Perrin
7e7ab596e4
Merge pull request #89 from claudiofelber/master 
Support horizontally flipped QR-codes according to ISO 18004:2015
 2020-09-23 22:09:39 +02:00
Claudio Felber
8e8a638a5f Update README.md with how to use quirc_flip() 2020-09-22 12:23:17 +02:00
Claudio Felber
2fd06df8de Add support for flipped QR-codes in inspect and qrtest tools 2020-09-22 12:18:23 +02:00
Claudio Felber
4bc17cf8c6 Optimize quirc_flip() 2020-09-22 12:14:09 +02:00
Claudio Felber
5beb59e3b4 Support horizontally flipped QR-codes according to ISO 18004:2015 2020-09-21 16:54:55 +02:00
Daniel Beer
92026d26bd
Merge pull request #87 from claudiofelber/master 
Fix stack corruption and bus errors while scanning oversized QR codes
 2020-09-21 11:13:11 +12:00
Claudio Felber
963d6ed126 Fix stack corruption and bus errors while scanning oversized QR codes 2020-09-15 00:51:41 +02:00
Alexandre Perrin
744372e551
Merge pull request #77 from JaapHaitsma/warning-fix 
Fix compiler warning
 2020-05-20 09:02:14 +02:00
Jaap Haitsma
013a8922bb Fix compiler warning 2020-05-19 19:01:38 -04:00
Alexandre Perrin
cbf911edf0
Merge pull request #69 from dlbeer/fix/c99 
Refactored some c99 features
 2020-03-13 21:51:35 +01:00
Alexandre Perrin
a0b41121e4 Refactored some c99 features 
Fixes #68
 2020-02-27 20:40:23 +01:00
Alexandre Perrin
2e8c4ce7bc Add a README note about building with DQUIRC_MAX_REGIONS 
Question about decoding large images has come up several times, let's
document it better.
 2019-10-23 09:37:24 +02:00
Alexandre Perrin
026485bdc6 missing <limits.h> header 2019-09-25 11:10:43 +02:00
Alexandre Perrin
b77da026c9 README.md formatting tweaks 2019-09-25 11:07:20 +02:00
Alexandre Perrin
db4046f997
Merge pull request #61 from roger-wetzel/patch-1 
Rename README to README.md
 2019-09-25 10:59:47 +02:00
Alexandre Perrin
bf397f0794
Merge pull request #57 from kAworu/cosmetic 
define a QUIRC_PIXEL_ALIAS_IMAGE constant to explicit conditional path
 2019-09-25 10:59:08 +02:00
Alexandre Perrin
74459b9f59 Don't assume that sizeof(int) == sizeof(int32_t) 
See https://github.com/dlbeer/quirc/pull/59#discussion_r320307589
 2019-09-25 10:57:38 +02:00
Daniel Beer
f27a7c2c75
Merge pull request #62 from sushshring/master 
Fixes issue #60
 2019-09-10 15:33:52 +12:00
Sushrut Shringarputale
26d2402655
Fixes issue #60 2019-09-09 23:09:20 -04:00
Roger Wetzel
3046f4c710
Rename README to README.md 
So this Readme gets rendered nicely.
 2019-09-03 19:41:56 +02:00
Daniel Beer
c89d949371
Merge pull request #59 from sushshring/master 
Fix some compile-time issues for better production usability
 2019-08-22 11:43:05 +12:00
Sushrut Shringarputale
ed833132d5 Fix some compile-time issues for better production usability 
Fixed up some type coercion and uninitialized variable instances for
better production code usability.
 2019-08-20 09:50:39 -07:00
Alexandre Perrin
f700e456b4 define a QUIRC_PIXEL_ALIAS_IMAGE constant to explicit conditional path 
Before this patch, the "sizeof dance" was confusing, fix #54.
 2019-07-02 09:22:25 +02:00
Daniel Beer
5d71b1853e identify: make otsu() static. 2019-05-02 15:56:35 +12:00
Daniel Beer
0e2dbec426
Merge pull request #55 from claudiofelber/master 
Replaced existing threshold function with Otsu threshold algorithm
 2019-05-02 15:55:22 +12:00
Claudio Felber
766f79ce7c Use const struct quirc parameter in otsu() function and fix tabs 2019-04-30 18:44:59 +02:00
Claudio Felber
96a5a380fb Remove quirc.row_average and associated code 
quirc.row_average was used by the former threshold function and has
become obsolete with the introduction of the Otsu threshold function.
 2019-04-30 18:43:57 +02:00
Claudio Felber
97ffaabfb5 Replace existing threshold function with Otsu threshold algorithm 2019-04-30 13:02:11 +02:00