From 288cfb9b8bad6943523663b23bd6bfb1e95be1ee Mon Sep 17 00:00:00 2001 From: Paul Elder Date: Thu, 6 Oct 2022 20:18:31 +0900 Subject: utils: libtuning: modules: Add base LSC module Add a base LSC module to libtuning's collection of modules. It is based on raspberrypi's ctt's ALSC, but customizable for different lens shading table sizes, among other things. It alone is insufficient as a module, but it provides utilities that are useful for and which will simplify implementing LSC modules. Signed-off-by: Paul Elder Reviewed-by: Laurent Pinchart --- utils/tuning/libtuning/modules/lsc/__init__.py | 5 ++ utils/tuning/libtuning/modules/lsc/lsc.py | 72 ++++++++++++++++++++++++++ 2 files changed, 77 insertions(+) create mode 100644 utils/tuning/libtuning/modules/lsc/__init__.py create mode 100644 utils/tuning/libtuning/modules/lsc/lsc.py (limited to 'utils') diff --git a/utils/tuning/libtuning/modules/lsc/__init__.py b/utils/tuning/libtuning/modules/lsc/__init__.py new file mode 100644 index 00000000..47d9b846 --- /dev/null +++ b/utils/tuning/libtuning/modules/lsc/__init__.py @@ -0,0 +1,5 @@ +# SPDX-License-Identifier: GPL-2.0-or-later +# +# Copyright (C) 2022, Paul Elder + +from libtuning.modules.lsc.lsc import LSC diff --git a/utils/tuning/libtuning/modules/lsc/lsc.py b/utils/tuning/libtuning/modules/lsc/lsc.py new file mode 100644 index 00000000..344a07a3 --- /dev/null +++ b/utils/tuning/libtuning/modules/lsc/lsc.py @@ -0,0 +1,72 @@ +# SPDX-License-Identifier: BSD-2-Clause +# +# Copyright (C) 2019, Raspberry Pi Ltd +# Copyright (C) 2022, Paul Elder + +from ..module import Module + +import libtuning as lt +import libtuning.utils as utils + +import numpy as np + + +class LSC(Module): + type = 'lsc' + hr_name = 'LSC (Base)' + out_name = 'GenericLSC' + + def __init__(self, *, + debug: list, + sector_shape: tuple, + sector_x_gradient: lt.Gradient, + sector_y_gradient: lt.Gradient, + sector_average_function: lt.Average, + smoothing_function: lt.Smoothing): + super().__init__() + + self.debug = debug + + self.sector_shape = sector_shape + self.sector_x_gradient = sector_x_gradient + self.sector_y_gradient = sector_y_gradient + self.sector_average_function = sector_average_function + + self.smoothing_function = smoothing_function + + def _enumerate_lsc_images(self, images): + for image in images: + if image.lsc_only: + yield image + + def _get_grid(self, channel, img_w, img_h): + # List of number of pixels in each sector + sectors_x = self.sector_x_gradient.distribute(img_w / 2, self.sector_shape[0]) + sectors_y = self.sector_y_gradient.distribute(img_h / 2, self.sector_shape[1]) + + grid = [] + + r = 0 + for y in sectors_y: + c = 0 + for x in sectors_x: + grid.append(self.sector_average_function.average(channel[r:r + y, c:c + x])) + c += x + r += y + + return np.array(grid) + + def _lsc_single_channel(self, channel: np.array, + image: lt.Image, green_grid: np.array = None): + grid = self._get_grid(channel, image.w, image.h) + grid -= image.blacklevel_16 + if green_grid is None: + table = np.reshape(1 / grid, self.sector_shape[::-1]) + else: + table = np.reshape(green_grid / grid, self.sector_shape[::-1]) + table = self.smoothing_function.smoothing(table) + + if green_grid is None: + table = table / np.min(table) + + return table, grid -- cgit v1.2.1