add LOPORA colormap

Author: swharden

.vscode/.ropeproject/config.py

@@ -0,0 +1,114 @@
+# The default ``config.py``
+# flake8: noqa
+
+
+def set_prefs(prefs):
+    """This function is called before opening the project"""
+
+    # Specify which files and folders to ignore in the project.
+    # Changes to ignored resources are not added to the history and
+    # VCSs.  Also they are not returned in `Project.get_files()`.
+    # Note that ``?`` and ``*`` match all characters but slashes.
+    # '*.pyc': matches 'test.pyc' and 'pkg/test.pyc'
+    # 'mod*.pyc': matches 'test/mod1.pyc' but not 'mod/1.pyc'
+    # '.svn': matches 'pkg/.svn' and all of its children
+    # 'build/*.o': matches 'build/lib.o' but not 'build/sub/lib.o'
+    # 'build//*.o': matches 'build/lib.o' and 'build/sub/lib.o'
+    prefs['ignored_resources'] = ['*.pyc', '*~', '.ropeproject',
+                                  '.hg', '.svn', '_svn', '.git', '.tox']
+
+    # Specifies which files should be considered python files.  It is
+    # useful when you have scripts inside your project.  Only files
+    # ending with ``.py`` are considered to be python files by
+    # default.
+    # prefs['python_files'] = ['*.py']
+
+    # Custom source folders:  By default rope searches the project
+    # for finding source folders (folders that should be searched
+    # for finding modules).  You can add paths to that list.  Note
+    # that rope guesses project source folders correctly most of the
+    # time; use this if you have any problems.
+    # The folders should be relative to project root and use '/' for
+    # separating folders regardless of the platform rope is running on.
+    # 'src/my_source_folder' for instance.
+    # prefs.add('source_folders', 'src')
+
+    # You can extend python path for looking up modules
+    # prefs.add('python_path', '~/python/')
+
+    # Should rope save object information or not.
+    prefs['save_objectdb'] = True
+    prefs['compress_objectdb'] = False
+
+    # If `True`, rope analyzes each module when it is being saved.
+    prefs['automatic_soa'] = True
+    # The depth of calls to follow in static object analysis
+    prefs['soa_followed_calls'] = 0
+
+    # If `False` when running modules or unit tests "dynamic object
+    # analysis" is turned off.  This makes them much faster.
+    prefs['perform_doa'] = True
+
+    # Rope can check the validity of its object DB when running.
+    prefs['validate_objectdb'] = True
+
+    # How many undos to hold?
+    prefs['max_history_items'] = 32
+
+    # Shows whether to save history across sessions.
+    prefs['save_history'] = True
+    prefs['compress_history'] = False
+
+    # Set the number spaces used for indenting.  According to
+    # :PEP:`8`, it is best to use 4 spaces.  Since most of rope's
+    # unit-tests use 4 spaces it is more reliable, too.
+    prefs['indent_size'] = 4
+
+    # Builtin and c-extension modules that are allowed to be imported
+    # and inspected by rope.
+    prefs['extension_modules'] = []
+
+    # Add all standard c-extensions to extension_modules list.
+    prefs['import_dynload_stdmods'] = True
+
+    # If `True` modules with syntax errors are considered to be empty.
+    # The default value is `False`; When `False` syntax errors raise
+    # `rope.base.exceptions.ModuleSyntaxError` exception.
+    prefs['ignore_syntax_errors'] = False
+
+    # If `True`, rope ignores unresolvable imports.  Otherwise, they
+    # appear in the importing namespace.
+    prefs['ignore_bad_imports'] = False
+
+    # If `True`, rope will insert new module imports as
+    # `from <package> import <module>` by default.
+    prefs['prefer_module_from_imports'] = False
+
+    # If `True`, rope will transform a comma list of imports into
+    # multiple separate import statements when organizing
+    # imports.
+    prefs['split_imports'] = False
+
+    # If `True`, rope will remove all top-level import statements and
+    # reinsert them at the top of the module when making changes.
+    prefs['pull_imports_to_top'] = True
+
+    # If `True`, rope will sort imports alphabetically by module name instead
+    # of alphabetically by import statement, with from imports after normal
+    # imports.
+    prefs['sort_imports_alphabetically'] = False
+
+    # Location of implementation of
+    # rope.base.oi.type_hinting.interfaces.ITypeHintingFactory In general
+    # case, you don't have to change this value, unless you're an rope expert.
+    # Change this value to inject you own implementations of interfaces
+    # listed in module rope.base.oi.type_hinting.providers.interfaces
+    # For example, you can add you own providers for Django Models, or disable
+    # the search type-hinting in a class hierarchy, etc.
+    prefs['type_hinting_factory'] = (
+        'rope.base.oi.type_hinting.factory.default_type_hinting_factory')
+
+
+def project_opened(project):
+    """This function is called after opening the project"""
+    # Do whatever you like here!

.vscode/.ropeproject/objectdb

@@ -0,0 +1,57 @@
+"""
+Attempt to mimic LOPORA colormap from
+https://github.com/swharden/Lopora/blob/20afe72416579f8b7d3c8861532c71a95b904066/src/LOPORA-v5a.py#L828-L872
+"""
+import numpy
+import matplotlib.pyplot as plt
+
+
+def doit(intensityCompression=2, pointCount=256):
+
+    Rs = numpy.ones(pointCount)
+    Gs = numpy.ones(pointCount)
+    Bs = numpy.ones(pointCount)
+
+    for n in range(pointCount):
+
+        frac = n / len(Rs)
+        v = frac ** (1.0 / (1.0 + float(intensityCompression) / 2.0))
+
+        R = int(v * v * 255 + 0.5)
+        Rs[n] = int(min(max(R, 0), 255))
+
+        G = int(v * 255 + 0.5)
+        Gs[n] = int(min(max(G, 0), 255))
+
+        B = int(255 * numpy.sqrt(v) + 0.5)
+        Bs[n] = int(min(max(B, 0), 255))
+
+    return [Rs, Gs, Bs]
+
+
+def rgbToInt32(r, g, b):
+    return int(r * 2**16 + g * 2**8 + b)
+
+
+if __name__ == "__main__":
+
+    [r, g, b] = doit()
+
+    for i in range(256):
+        int32 = rgbToInt32(r[i], g[i], b[i])
+        print(f"{int32:010d}, ", end='')
+        if i % 8 == 7:
+            print()
+
+    # plt.plot(r, 'r-', alpha=.5)
+    # plt.plot(g, 'g-', alpha=.5)
+    # plt.plot(b, 'b-', alpha=.5)
+
+    # plt.grid(alpha=.2, ls='--')
+    # plt.title("Lopora Style Colormap")
+    # plt.xlabel("input value")
+    # plt.ylabel("color intensity")
+    # plt.tight_layout()
+    # plt.show()
+
+    print("DONE")

dev/colormap/lopora-brightness.png

@@ -14,6 +14,7 @@ public class Colormap
         public static Colormap GrayscaleReversed => new Colormap(new Colormaps.Grayscale());
         public static Colormap Greens => new Colormap(new Colormaps.Greens());
         public static Colormap Inferno => new Colormap(new Colormaps.Inferno());
+        public static Colormap Lopora => new Colormap(new Colormaps.Lopora());
         public static Colormap Magma => new Colormap(new Colormaps.Magma());
         public static Colormap Plasma => new Colormap(new Colormaps.Plasma());
         public static Colormap Turbo => new Colormap(new Colormaps.Turbo());

dev/colormap/lopora-display.png

@@ -0,0 +1,55 @@
+/* Lopora is an open-source weak signal spectrogram by Onno Hoekstra (PA2OHH)
+ * This colormap was created to mimic the default colors used by Lopora.
+ * https://www.qsl.net/pa2ohh/11lop.htm
+ * https://github.com/swharden/Lopora/blob/20afe72416579f8b7d3c8861532c71a95b904066/src/LOPORA-v5a.py#L828-L872
+ */
+
+using System;
+
+namespace Spectrogram.Colormaps
+{
+    class Lopora : IColormap
+    {
+        public (byte r, byte g, byte b) GetRGB(byte value)
+        {
+            byte[] bytes = BitConverter.GetBytes(rgb[value]);
+            return (bytes[2], bytes[1], bytes[0]);
+        }
+
+        private readonly int[] rgb =
+        {
+            0000000000, 0000069696, 0000137036, 0000203860, 0000270426, 0000336991, 0000403300, 0000469608,
+            0000535915, 0000602222, 0000668273, 0000734580, 0000800631, 0000866681, 0000932987, 0000999037,
+            0001065088, 0001131137, 0001197187, 0001262981, 0001329031, 0001395080, 0001461130, 0001526924,
+            0001592973, 0001659023, 0001724816, 0001790865, 0001856659, 0001922708, 0001988501, 0002054550,
+            0002120344, 0002186393, 0002252186, 0002317979, 0002384028, 0002449821, 0002515614, 0002581663,
+            0002647456, 0002713249, 0002779042, 0002845091, 0002910884, 0002976677, 0003042470, 0003108263,
+            0003174056, 0003240105, 0003305898, 0003371690, 0003437483, 0003503276, 0003569069, 0003634862,
+            0003700654, 0003766447, 0003832240, 0003898033, 0003963825, 0004029618, 0004095411, 0004161204,
+            0004227252, 0004292789, 0004358582, 0004424374, 0004490167, 0004555960, 0004621752, 0004687545,
+            0004753338, 0004819130, 0004884923, 0004950716, 0005016508, 0005082301, 0005148093, 0005213886,
+            0005279679, 0005345215, 0005411008, 0005476800, 0005542593, 0005608386, 0005674178, 0005739971,
+            0005805763, 0005871300, 0005937092, 0006002885, 0006068677, 0006134470, 0006200263, 0006265799,
+            0006331592, 0006397384, 0006463177, 0006528969, 0006594506, 0006660298, 0006726091, 0006791883,
+            0006857676, 0006923212, 0006989005, 0007054797, 0007120590, 0007186126, 0007251918, 0007317711,
+            0007383503, 0007449040, 0007514832, 0007580625, 0007646417, 0007711954, 0007777746, 0007843539,
+            0007909331, 0007974867, 0008040660, 0008106452, 0008171989, 0008237781, 0008303574, 0008369366,
+            0008434902, 0008435159, 0008500951, 0008566488, 0008632280, 0008698072, 0008763609, 0008829401,
+            0008895194, 0008960986, 0009026522, 0009092315, 0009158107, 0009223644, 0009289436, 0009355228,
+            0009420765, 0009486557, 0009552350, 0009617886, 0009683678, 0009749471, 0009815007, 0009880799,
+            0009946336, 0010012128, 0010077921, 0010143457, 0010209249, 0010275042, 0010340578, 0010406370,
+            0010472163, 0010537699, 0010603491, 0010669028, 0010734820, 0010800612, 0010866149, 0010931941,
+            0010997734, 0011063270, 0011129062, 0011194599, 0011260391, 0011326183, 0011391720, 0011457512,
+            0011523048, 0011588841, 0011654633, 0011720169, 0011785962, 0011851498, 0011917290, 0011983082,
+            0012048619, 0012114411, 0012179947, 0012245740, 0012311532, 0012377068, 0012442861, 0012508397,
+            0012574189, 0012639726, 0012705518, 0012771310, 0012836847, 0012902639, 0012968175, 0013033967,
+            0013099504, 0013165296, 0013231088, 0013296625, 0013362417, 0013427953, 0013493746, 0013559282,
+            0013625074, 0013690610, 0013756403, 0013822195, 0013887731, 0013953524, 0014019060, 0014084852,
+            0014150388, 0014216181, 0014281717, 0014347509, 0014413046, 0014478838, 0014544374, 0014610166,
+            0014675959, 0014741495, 0014807287, 0014872823, 0014938616, 0015004152, 0015069944, 0015135481,
+            0015201273, 0015266809, 0015332601, 0015398138, 0015463930, 0015529466, 0015595258, 0015660795,
+            0015726587, 0015792123, 0015857915, 0015923452, 0015989244, 0016054780, 0016120572, 0016186109,
+            0016251901, 0016317437, 0016383229, 0016448766, 0016514558, 0016580350, 0016645887, 0016711679,
+        };
+    }
+}