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authorPaul Elder <paul.elder@ideasonboard.com>2022-10-06 20:18:31 +0900
committerPaul Elder <paul.elder@ideasonboard.com>2022-11-25 15:37:34 +0900
commit288cfb9b8bad6943523663b23bd6bfb1e95be1ee (patch)
tree83f60c8e4c5274915ad780d6dcc69ade542fd757 /utils/tuning/libtuning
parentb8af2500fa900a1b18a554abf98e3f0fcb7bb350 (diff)
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 <paul.elder@ideasonboard.com> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Diffstat (limited to 'utils/tuning/libtuning')
-rw-r--r--utils/tuning/libtuning/modules/lsc/__init__.py5
-rw-r--r--utils/tuning/libtuning/modules/lsc/lsc.py72
2 files changed, 77 insertions, 0 deletions
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 <paul.elder@ideasonboard.com>
+
+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 <paul.elder@ideasonboard.com>
+
+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