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
8b5c3dc6c1
Fix bool flags
2021-11-24 16:03:55 +00:00
9a77af37aa
Add a --show-final-score to output the final image quality score.
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This is useful when used as part of an image repository build
pipeline, to avoid replacing existing images if the new score is
higher.
Hide intermediate output behind --verbose
2021-11-24 15:49:56 +00:00
0036ee9522
Add default values to help
2021-11-24 15:44:37 +00:00
8d3ab4f50e
Add the ability to disable saving preview images. Also rename --gamma_correct to --gamma-correct for consistency
2021-11-24 15:41:32 +00:00
8175dcb052
Add --fixed-colours to control how many colours will be kept identical
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across all 16 SHR palettes.
2021-11-24 15:27:34 +00:00
5fefd0b0bb
Don't initialize pygame if --no-show-output
2021-11-24 15:24:58 +00:00
e77e7abd43
Rename
2021-11-24 15:24:45 +00:00
d645cc5964
Tidy
2021-11-24 15:21:50 +00:00
c36de2b76b
When initializing centroids for fitting the SHR palettes, only use the
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reserved colours from the global palette, and pick unique random
points from the samples for the rest. This encourages a larger range
of colours in the resulting images and may improve quality.
Iterate a max number of times without improvement in the outer loop as
well.
Save intermediate preview outputs.
2021-11-24 14:57:24 +00:00
3b8767782b
Each run seems to converge fairly quickly but there is a lot of variation across runs. Run in a loop and keep the running best.
2021-11-24 11:47:39 +00:00
de8a303de2
Initial attempt at fitting palettes to arbitrary lines instead of line ranges.
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Works OK but isn't converging as well as I hoped.
2021-11-24 10:41:25 +00:00
50c71d3a35
Whitespace
2021-11-24 09:19:35 +00:00
04fd4f7427
Move reassigning palettes back to after fitting, otherwise it does the
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wrong thing the first time.
Fix an off by one when splitting palette ranges
2021-11-24 09:18:59 +00:00
62f23ff910
Don't mutate initial_centroids
2021-11-24 09:10:03 +00:00
7179d009e1
Refactor
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Reassign palettes before computing new ones instead of after
2021-11-23 15:09:12 +00:00
e488955c23
Reorder
2021-11-23 14:58:46 +00:00
kris