5d6cbfc438
Tweak
2023-02-03 00:29:59 +00:00
4f8fe0c1e8
Fix breakage in refactoring
2023-02-03 00:29:19 +00:00
a3433fd632
Document hi-res and add some examples
2023-02-03 00:28:54 +00:00
153c104f94
Rename class and add comments
2023-02-03 00:04:32 +00:00
cb9228e46d
Add comments
2023-02-02 23:55:08 +00:00
b0aa38fe06
Unify DHR and HGR implementation in screen.py
2023-02-02 23:53:48 +00:00
f019823505
Clean up hgr conversion optionns
2023-02-02 23:35:28 +00:00
36946f6ac7
Unify DHR and HGR image conversion
2023-02-02 23:18:03 +00:00
d47defbd80
Prepare to unify with dither_dhr.pyx
2023-02-02 23:14:29 +00:00
762a21556a
Clean up
2023-02-02 22:29:24 +00:00
db4449ea26
Working version
2023-02-02 22:17:56 +00:00
154a0b7c29
WIP - HGR support
2023-01-31 21:34:29 +00:00
1b08a8f1b1
Whitespace
2023-01-31 21:34:29 +00:00
6573bad509
Merge pull request #10 from KrisKennaway/fix-lookahead
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Fix --lookahead parsing
2023-01-31 21:32:02 +00:00
0560409717
Fix --lookahead parsing
2023-01-31 21:28:40 +00:00
055851aa9c
Merge pull request #9 from KrisKennaway/create-data-dir
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Create data directory before writing to it
2023-01-31 21:15:03 +00:00
2ab582790c
Create data directory before writing to it
2023-01-31 21:12:42 +00:00
05a3624866
Merge pull request #5 from KrisKennaway/mono
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Add support for DHGR mono conversions and fix compatibility with python 3.10
2023-01-21 17:32:14 +00:00
39e8eac8ed
Add support for DHGR mono conversions
2023-01-21 17:30:27 +00:00
629104b933
Fixes for python 3.10 and/or latest dependency versions
2023-01-21 17:29:06 +00:00
7b8b6bc12b
Tweak
2022-07-19 22:41:38 +01:00
7ce574dc06
Add SHR details
2022-07-19 22:39:56 +01:00
2a1874face
Tweak wording
2022-07-19 22:39:11 +01:00
c61bd258fd
Add sample SHR conversions
2022-07-19 22:38:59 +01:00
b11b322c39
Move DHR examples to subdir in preparation for adding SHR examples
2022-07-18 23:11:23 +01:00
bce2153d97
Merge pull request #4 from KrisKennaway/shr
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Add support for Super Hi-Res conversions
2022-07-18 23:06:18 +01:00
1468e06d2f
Tweak
2022-07-18 23:02:49 +01:00
1486f8a394
Add TODO
2022-07-18 22:31:22 +01:00
12d6805617
Update docs for 2.0 and split out the technical details of dhr into its own file
2022-07-18 22:30:56 +01:00
e156dd3b48
Add a requirements.txt to simplify installation
2022-07-18 22:11:32 +01:00
3196369b7d
Tidy a bit and add a --save-intermediate flag
2022-07-18 10:00:19 +01:00
1ffb2c9110
Tidy
2022-07-18 09:59:01 +01:00
8fd0ec5dc6
Set window title and clean up a bit
2022-07-16 22:13:26 +01:00
e71352490d
Add comments
2022-07-16 22:00:42 +01:00
99aa394196
Tweak comment
2022-07-16 22:00:14 +01:00
cfef9fa3c9
Add arg type
2022-07-16 21:57:45 +01:00
ccbb6980d9
Load data files relative to script path
2021-11-27 10:43:41 +00:00
a2b67ba882
Require a subcommand
2021-11-26 13:36:29 +00:00
4d5dea2c41
Restore dhr conversion support
2021-11-26 13:15:57 +00:00
0a964b377a
Move SHR conversion out into convert_shr in preparation for re-enabling dhr support
2021-11-26 12:35:45 +00:00
ae89682dab
Split out common utility functions into a shared module
2021-11-26 12:26:46 +00:00
0dc2c0a7a0
Disable bounds checking and wraparound by default
2021-11-26 12:12:55 +00:00
4221c00701
Split dither into dither_dhr and dither_shr
2021-11-26 12:08:48 +00:00
1075ff0136
Tidy a bit and remove support for tunable parameters that are no longer needed
2021-11-26 10:36:39 +00:00
cf63a35797
Cython tweaks to remove some unnecessary C code
2021-11-26 09:54:42 +00:00
25e6ed7b88
Preserve palette order when deduplicating entries
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Also make sure we're not mutating _global_palettes, though this should
currently be harmless.
2021-11-25 21:57:27 +00:00
61b4cbb184
Tweak k-means convergence criterion to return once the total centroid position error stops decreasing.
2021-11-25 21:33:12 +00:00
fc35387360
- Fill any palettes that have fewer than 16 unique entries after
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clustering, using the most frequent pixel colours that are not yet
in the palette
- Reassign any palettes that are duplicated after clustering
2021-11-25 13:14:22 +00:00
ad50ed103d
Improvements to image quality:
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- Preprocess the source image by dithering with the full 12-bit //gs
colour palette, ignoring SHR palette restrictions (i.e. each pixel
chosen independently from 4096 colours)
- Using this as the ground truth allows much better handling of
e.g. solid colours, which were being dithered inconsistently with
the previous approach
- Also when fitting an SHR palette, fix any colours that comprise more
than 10% of source pixels. This also encourages more uniformity in
regions of solid colour.
2021-11-25 11:46:42 +00:00
870c008827
Parametrize quantization error decay and minimum value. The latter
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helps with images where there are large solid colour fields that
sometimes cause uneven dithering because of colours that cannot be
matched with the //gs palette, but it's not a viable solution in
general since it reduces overall quality (sometimes substantially,
e.g. in case of vertical colour gradients)
2021-11-25 09:09:40 +00:00
kris