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Merge pull request #16 from adafruit/image-processing
Image processing
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‎LICENSES/CC0-1.0.txt‎

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‎adafruit_pycamera/imageprocessing.py‎

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# SPDX-FileCopyrightText: 2024 Jeff Epler for Adafruit Industries
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#
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# SPDX-License-Identifier: MIT
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"""Routines for performing image manipulation"""
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import bitmapfilter
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from adafruit_pycamera.ironbow import ironbow_palette
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sepia_weights = bitmapfilter.ChannelMixer(
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0.393, 0.769, 0.189, 0.349, 0.686, 0.168, 0.272, 0.534, 0.131
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)
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def sepia(bitmap, mask=None):
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"""Apply a sepia filter to an image in place"""
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bitmapfilter.mix(bitmap, sepia_weights, mask=mask)
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return bitmap
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negative_weights = bitmapfilter.ChannelScaleOffset(-1, 1, -1, 1, -1, 1)
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def negative(bitmap, mask=None):
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"""Invert an image"""
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bitmapfilter.mix(bitmap, negative_weights, mask=mask)
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return bitmap
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greyscale_weights = bitmapfilter.ChannelMixer(
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0.299, 0.587, 0.114, 0.299, 0.587, 0.114, 0.299, 0.587, 0.114
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)
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def greyscale(bitmap, mask=None):
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"""Convert an image to greyscale"""
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bitmapfilter.mix(bitmap, greyscale_weights, mask=mask)
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return bitmap
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def red_cast(bitmap, mask=None):
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"""Give an image a red cast by dividing G and B channels in half"""
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bitmapfilter.mix(bitmap, bitmapfilter.ChannelScale(1, 0.5, 0.5), mask=mask)
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return bitmap
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def green_cast(bitmap, mask=None):
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"""Give an image a green cast by dividing R and B channels in half"""
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bitmapfilter.mix(bitmap, bitmapfilter.ChannelScale(0.5, 1, 0.5), mask=mask)
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return bitmap
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def blue_cast(bitmap, mask=None):
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"""Give an image a blue cast by dividing R and G channels in half"""
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bitmapfilter.mix(bitmap, bitmapfilter.ChannelScale(0.5, 0.5, 1), mask=mask)
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return bitmap
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def blur(bitmap, mask=None):
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"""Blur a bitmap"""
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bitmapfilter.morph(bitmap, (1, 2, 1, 2, 4, 2, 1, 2, 1), mask=mask)
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return bitmap
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def sharpen(bitmap, mask=None):
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"""Sharpen a bitmap"""
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bitmapfilter.morph(bitmap, (-1, -2, -1, -2, 13, -2, -1, -2, -1), mask=mask)
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return bitmap
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def emboss(bitmap, mask=None):
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"""Run an emboss filter on the bitmap"""
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bitmapfilter.morph(bitmap, (-2, -1, 0, -1, 0, 1, 0, 1, 2), add=0.5, mask=mask)
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def emboss_greyscale(bitmap, mask=None):
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"""Run an emboss filter on the bitmap in greyscale"""
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greyscale(bitmap, mask=mask)
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return emboss(bitmap, mask=mask)
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def ironbow(bitmap, mask=None):
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"""Convert an image to false color using the 'ironbow palette'"""
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return bitmapfilter.false_color(bitmap, ironbow_palette, mask=mask)

‎adafruit_pycamera/ironbow.py‎

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# SPDX-FileCopyrightText: 2024 Jeff Epler for Adafruit Industries
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#
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# SPDX-License-Identifier: MIT
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"""The 'ironbow' palette used to convert images to false color"""
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import displayio
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ironbow_palette = displayio.Palette(256)
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"""A palette often used to convert images to false color"""
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# fmt: off
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for i, pi in enumerate(
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[
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0xFFFFFF, 0xFFFFFF, 0xFFFEFF, 0xF7FEF7, 0xF7FDF7, 0xF7FDF7, 0xF7FCF7, 0xEFFCEF,
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0xEFFFEF, 0xEFFFEF, 0xEFFAEF, 0xE7FAE7, 0xE7FDE7, 0xE7FDE7, 0xE7F8E7, 0xDEF8DE,
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0xDEFFDE, 0xDEFFDE, 0xDEFEDE, 0xD6FED6, 0xD6F5D6, 0xD6F5D6, 0xD6F4D6, 0xCEF4CE,
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0xCEFFCE, 0xCEFFCE, 0xCEFACE, 0xC6FAC6, 0xC6F5C6, 0xC6F5C6, 0xC6F0C6, 0xBDF0BD,
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0xBDBFBD, 0xBDBFBD, 0xBDBEBD, 0xB5BEB5, 0xB5BDB5, 0xB5BDB5, 0xB5BCB5, 0xB5BCB5,
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0xADAFAD, 0xADAFAD, 0xADAAAD, 0xADAAAD, 0xA5ADA5, 0xA5ADA5, 0xA5A8A5, 0xA5A8A5,
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0x9CBF9C, 0x9CBF9C, 0x9CBE9C, 0x9CBE9C, 0x94B594, 0x94B594, 0x94B494, 0x94B494,
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0x8CAF8C, 0x8CAF8C, 0x8CAA8C, 0x8CAA8C, 0x84A584, 0x84A584, 0x84A084, 0x84A084,
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0x7B7F7B, 0x7B7F7B, 0x7B7E7B, 0x7B7E7B, 0x737D73, 0x737D73, 0x737C73, 0x737C73,
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0x6B7F6B, 0x6B7F6B, 0x6B7A6B, 0x6B7A6B, 0x637D63, 0x637D63, 0x637863, 0x637863,
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0x5A5F5A, 0x5A5F5A, 0x5A5E5A, 0x5A5E5A, 0x525552, 0x525552, 0x525452, 0x525452,
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0x4A5F4A, 0x4A5F4A, 0x4A5A4A, 0x4A5A4A, 0x4A554A, 0x425542, 0x425042, 0x425042,
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0x423F42, 0x393F39, 0x393E39, 0x393E39, 0x393D39, 0x313D31, 0x313C31, 0x313C31,
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0x312F31, 0x292F29, 0x292A29, 0x292A29, 0x292D29, 0x212D21, 0x212821, 0x212821,
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0x211F21, 0x181F18, 0x181E18, 0x181E18, 0x181518, 0x101510, 0x101410, 0x101410,
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0x100F10, 0x080F08, 0x080A08, 0x080A08, 0x080508, 0x000500, 0x000000, 0x000000,
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0x000008, 0x000010, 0x000018, 0x080021, 0x080029, 0x080029, 0x080031, 0x100039,
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0x100042, 0x10004A, 0x180052, 0x18005A, 0x180063, 0x18006B, 0x21006B, 0x210073,
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0x21007B, 0x29007B, 0x31007B, 0x31007B, 0x39007B, 0x39007B, 0x42007B, 0x4A007B,
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0x4A0084, 0x520084, 0x520084, 0x5A0084, 0x630084, 0x630084, 0x6B0084, 0x6B0084,
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0x73008C, 0x7B008C, 0x7B008C, 0x84008C, 0x84058C, 0x8C058C, 0x94058C, 0x94058C,
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0x9C058C, 0x9C058C, 0xA5058C, 0xA5058C, 0xAD058C, 0xB5058C, 0xB50A8C, 0xBD0A8C,
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0xBD0A8C, 0xBD0F84, 0xC6147B, 0xC6157B, 0xC61573, 0xC61E6B, 0xCE1F6B, 0xCE2863,
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0xCE2863, 0xCE2D5A, 0xD62A52, 0xD62F52, 0xD62F4A, 0xDE3C42, 0xDE3D42, 0xDE3E39,
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0xDE3E31, 0xDE3F31, 0xDE5029, 0xE75529, 0xE75A29, 0xE75A21, 0xE75F21, 0xE75421,
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0xE75521, 0xE75E18, 0xE75F18, 0xE75F18, 0xEF7810, 0xEF7D10, 0xEF7A10, 0xEF7F08,
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0xEF7C08, 0xEF7D08, 0xEF7D08, 0xEF7E08, 0xEF7F08, 0xEFA008, 0xEFA508, 0xF7AA08,
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0xF7AF10, 0xF7B410, 0xF7B510, 0xF7BE10, 0xF7BF10, 0xF7A810, 0xF7A810, 0xF7AD10,
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0xF7AA10, 0xF7AF10, 0xF7BC10, 0xF7BD10, 0xF7BE10, 0xF7BF10, 0xF7BF10, 0xFFF018,
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0xFFF518, 0xFFFA18, 0xFFFF18, 0xFFF418, 0xFFF518, 0xFFFE18, 0xFFFE21, 0xFFFF21,
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0xFFF829, 0xFFFD31, 0xFFFD42, 0xFFFA52, 0xFFFA63, 0xFFFA6B, 0xFFFF7B, 0xFFFF8C,
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0xFFFC94, 0xFFFCA5, 0xFFFDB5, 0xFFFDBD, 0xFFFECE, 0xFFFEDE, 0xFFFFEF, 0xFFFF18,
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]
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):
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ironbow_palette[i] = pi
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del i
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del pi
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del displayio

‎docs/api.rst‎

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.. automodule:: adafruit_pycamera
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:members:
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.. automodule:: adafruit_pycamera.imageprocessing
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:members:
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.. automodule:: adafruit_pycamera.ironbow
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:members:

‎docs/conf.py‎

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import sys
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sys.path.insert(0, os.path.abspath(".."))
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sys.path.insert(0, os.path.abspath("mock"))
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# -- General configuration ------------------------------------------------
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"adafruit_debouncer",
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"adafruit_display_text",
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"adafruit_lis3dh",
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"adafruit_ticks",
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"bitmaptools",
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"bitmapfilter",
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"busdisplay",
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"busio",
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"digitalio",
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"displayio",
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"espcamera",
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"fourwire",
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"micropython",
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"neopixel",
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"sdcardio",
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"storage",
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"terminalio",
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"ulab",
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]
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autodoc_preserve_defaults = True

‎docs/mock/displayio.py‎

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# SPDX-FileCopyrightText: 2024 Jeff Epler for Adafruit Industries
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#
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# SPDX-License-Identifier: Unlicense
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class Palette:
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def __init__(self, i):
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self._data = [0] * i
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def __setitem__(self, idx, value):
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self._data[idx] = value

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