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c5f2fbda
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2025-11-25T11:33:48
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silence warning
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89b14ca9
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2025-11-25T11:33:25
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change encoding to utf8-unix
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1c8433cb
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2025-04-10T13:54:58
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Version 3.1: Implemented full C++ compliance, eliminated `stdlib.h` dependency.
Removed a previously added scanline unbiasing since its positive effect was a compiler-dependent statistical error.
Fixed a bug with bit-depth conversions (e.g., 16-bit to 8-bit).
Fixed `sign conversion`, `nullptr`, and other compiler warnings.
Optimized dithering function.
Added 8-bit input gamma correction optimization.
Added optional gamma correction bypass for alpha-channel (`AlphaIndex`).
LANCIR: implemented WebAssembly SIMD128 support.
Improved documentation.
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24034240
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2021-10-03T09:31:06
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Version 3.0.
Improved speed by 10-25% on upsizing by utilizing a special resizing function together with filter-less 2X upsizing. Does not apply to the de-interleaved (AVX) resizing.
Minor LANCIR optimization.
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109cf2ba
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2021-04-19T08:00:20
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Version 2.9.
Removed a rarely-used half-band resizing step completely since it offers no practical performance nor quality benefits.
Optimized filter generation function (removed divisions by a constant) as filters are always post-normalized anyway. This may reduce overhead when creating thumbnail-sized images.
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c6e4dead
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2021-04-15T17:27:09
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Version 2.8.
Fixed regression with the copy-constructor of CImageResizeVars class (previously it caused uninitialized accesses).
Removed filter length optimization as it did not reduce overhead measurably.
Optimized "peaked cosine" window function generator (removed division).
Added "unbiasing" to resizer - an unconventional approach which reduces peak error significantly, at the expense of 5% increased overhead.
Reoptimized filter parameters, now yielding an unprecedented quality.
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4efa5c61
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2021-04-10T22:34:30
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Version 2.7.
Added normalization of individual fractional delay filters. This reduced peak error by 3 dB, which is substantial for image resizing.
Reoptimized all filter parameters resulting in better frequency response linearity.
Added AVIR_NOCTOR macro to avoid copy-constructing and copying objects of some classes via a default copy function.
Added copy-constructor and assignment operator to the CImageResizerVars class, to avoid uninitialized memory copying.
Corrected automatic image offseting and "k" factor on image upsizing.
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976e612a
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2020-09-04T05:49:50
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A minor fix to sRGB gamma approximation functions.
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9f0f3266
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2020-04-26T07:09:12
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Version 2.5 release.
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7dd9515e
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2019-07-29T07:43:23
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Version 2.4 release.
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13d00bb2
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2019-05-16T06:30:49
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Fixed a minor image offset on image upsizing.
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60b1a5aa
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2019-02-13T16:55:18
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Added AVIR_VERSION string macro.
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cb44860f
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2019-01-15T11:52:54
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Released AVIR under a permissive MIT license agreement.
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752557d1
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2018-08-08T19:44:46
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Minor improvements, see Change log 2.1.
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2b51e4b0
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2018-08-07T22:33:08
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Made several minor improvements - see Change log 2.0.
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d7a04591
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2016-10-30T18:31:49
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Fixed image offset on enlargement with the "k" factor specified explicitly.
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5421e466
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2016-10-25T09:04:43
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Fixed SIMD-related MS Visual C++ compile errors.
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8054d05a
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2016-10-24T09:57:31
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Fixed MS Visual C++ compiler error.
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ff4717f8
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2016-08-05T19:44:20
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Added the built-in sRGB gamma correction.
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859c7dd8
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2016-06-07T08:47:02
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Dithering is now not used by default. Default is simple rounding.
Updated "imageresize" utility with the -d switch which enables dithering.
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f7060ae2
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2016-03-12T12:25:29
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Fixed smoothing when downsizing image by a factor 1 to 2.
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4222213a
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2015-11-10T19:23:24
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Fixed access violation due to a possible unaligned SIMD variable access.
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e8ecde3e
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2015-11-10T17:49:34
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Implemented de-interleaved processing useful for 1-channel image resizing.
Added float8 SIMD type support.
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b4ec08f2
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2015-11-06T10:46:17
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Made enhancements to allow de-interleaved processing.
Optimized temporary buffer allocation.
Updated README.md with more info.
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f48b1e53
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2015-10-24T12:25:16
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Fixed incorrect sub-pixel offsetting at some settings.
Updated README.md with more info.
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c8703955
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2015-10-21T23:23:59
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5a12d43a
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2015-10-14T23:20:59
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Implemented "float4" SIMD data type support that offers 10-50% performance boost.
Added abstraction layer for scanline processing functions.
Added abstraction layer for dithering.
Added 0th order filter bank for better 8-bit resizing performance.
Optimized interpolation filter's quality.
Improved default image resizer parameter sets.
Optimized half-band filter used for 8X downsizing.
Optimized correction filter used during upsizing.
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e3a3d67e
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2015-10-01T21:20:20
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Optimizied default resizer parameters.
"Fast" resizer parameters are now called as "LR" (low-ring).
Added "ultra" resizer parameters.
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f5bce79a
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2015-09-24T23:18:52
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Considerably optimized upsizing by 2 or more.
Removed a minor border-line artifact during upsizing.
Fixed an aliasing artifact when downsizing by 8 or more.
Updated and refined the license agreement.
Improved the default set of resizer parameters.
Added a set of "faster" resizer parameters.
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a8e30230
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2015-09-19T23:06:09
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Initial commit.
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