Use cv2.warpPerspective instead of dumb interpolation
https://docs.opencv.org/4.9.0/da/d6e/tutorial_py_geometric_transformations.html
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3 changed files with 16 additions and 43 deletions
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@ -10,11 +10,11 @@ pip install --upgrade reedsolo --no-binary "reedsolo" --no-cache --config-settin
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## Usage
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Encode: `python encoder.py -i in -o vid.mkv`
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Encode: `python encoder.py -i in`
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Play video: `mpv --scale=nearest --fullscreen --loop --no-keepaspect vid.mkv`
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Copy the flags printed by the encoder and pass them to the decoder: `python decoder.py -o out FLAGS`
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Copy the flags printed by the encoder and pass them to the decoder: `python decoder.py FLAGS`
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Formatting: `black -l 120 *.py`
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51
decoder.py
51
decoder.py
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@ -1,15 +1,14 @@
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import argparse
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import sys
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import traceback
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import cv2
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import matplotlib.pyplot as plt
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# import matplotlib.pyplot as plt
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import numpy as np
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from creedsolo import RSCodec
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from raptorq import Decoder
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parser = argparse.ArgumentParser(formatter_class=argparse.ArgumentDefaultsHelpFormatter)
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parser.add_argument("-i", "--input", help="camera device index or input video file", default=0)
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parser.add_argument("-o", "--output", help="output file for decoded data")
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parser.add_argument("-o", "--output", help="output file for decoded data", default="out")
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parser.add_argument("-x", "--height", help="grid height", default=100, type=int)
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parser.add_argument("-y", "--width", help="grid width", default=100, type=int)
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parser.add_argument("-f", "--fps", help="frame rate", default=30, type=int)
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@ -38,7 +37,7 @@ def find_corner(A, f):
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mask = cv2.floodFill(
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A,
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np.empty(0),
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tuple(reversed(guess)),
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tuple(np.flip(guess)),
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0,
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(100, 100, 100),
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(100, 100, 100),
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@ -83,42 +82,16 @@ while data is None:
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bcol -= origin
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F = 255 * np.linalg.inv(np.stack((rcol, gcol, bcol)).T)
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# Dumb perspective transform
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xv = np.linspace(
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-(cheight / 2 - 1) / (args.height - cheight + 1),
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1 + (cheight / 2 - 1) / (args.height - cheight + 1),
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args.height,
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cch = cheight / 2 - 1
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ccw = cwidth / 2 - 1
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M = cv2.getPerspectiveTransform(
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np.float32([np.flip(widx), np.flip(ridx), np.flip(gidx), np.flip(bidx)]),
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np.float32([[ccw, cch], [args.width - ccw - 1, cch], [ccw, args.height - ccw - 1], [args.width - ccw - 1, args.height - cch - 1]]),
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)
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yv = np.linspace(
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-(cwidth / 2 - 1) / (args.width - cwidth + 1),
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1 + (cwidth / 2 - 1) / (args.width - cwidth + 1),
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args.width,
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)
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xp = (
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np.outer(1 - xv, 1 - yv) * widx[0]
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+ np.outer(1 - xv, yv) * ridx[0]
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+ np.outer(xv, 1 - yv) * gidx[0]
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+ np.outer(xv, yv) * bidx[0]
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)
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yp = (
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np.outer(1 - xv, 1 - yv) * widx[1]
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+ np.outer(1 - xv, yv) * ridx[1]
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+ np.outer(xv, 1 - yv) * gidx[1]
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+ np.outer(xv, yv) * bidx[1]
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)
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# plt.scatter(widx[1], widx[0])
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# plt.scatter(ridx[1], ridx[0])
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# plt.scatter(gidx[1], gidx[0])
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# plt.scatter(bidx[1], bidx[0])
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# plt.scatter(yp, xp)
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# plt.imshow(raw_frame.astype(np.uint8))
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# plt.show()
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frame = raw_frame[
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np.clip(np.round(xp).astype(np.int64), 0, X - 1), np.clip(np.round(yp).astype(np.int64), 0, Y - 1), :
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]
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frame = cv2.warpPerspective(raw_frame, M, (args.width, args.height))
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frame = (np.squeeze(F @ (frame - origin)[..., np.newaxis]) >= 128).astype(np.uint8)
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# plt.imshow(frame * 255)
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# plt.show()
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frame = np.concatenate(
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(
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frame[:cheight, cwidth : args.width - cwidth].flatten(),
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@ -130,7 +103,7 @@ while data is None:
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data = decoder.decode(bytes(rsc.decode(bytearray(np.packbits(frame) ^ frame_xor))[0][: args.psize]))
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print("Decoded frame")
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except KeyboardInterrupt:
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sys.exit()
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break
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except:
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traceback.print_exc()
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with open(args.output, "wb") as f:
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@ -6,7 +6,7 @@ from raptorq import Encoder
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parser = argparse.ArgumentParser(formatter_class=argparse.ArgumentDefaultsHelpFormatter)
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parser.add_argument("-i", "--input", help="input file")
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parser.add_argument("-o", "--output", help="output video file")
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parser.add_argument("-o", "--output", help="output video file", default="vid.mkv")
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parser.add_argument("-x", "--height", help="grid height", default=100, type=int)
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parser.add_argument("-y", "--width", help="grid width", default=100, type=int)
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parser.add_argument("-f", "--fps", help="frame rate", default=30, type=int)
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@ -39,7 +39,7 @@ rcorner = np.pad(np.dstack((ones, zeros, zeros)), ((0, 1), (1, 0), (0, 0)))
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gcorner = np.pad(np.dstack((zeros, ones, zeros)), ((1, 0), (0, 1), (0, 0)))
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bcorner = np.pad(np.dstack((zeros, zeros, ones)), ((1, 0), (1, 0), (0, 0)))
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print(f"-x {args.height} -y {args.width} -l {args.level} -s {len(data)} -p {len(packets[0])}")
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print(f"-x {args.height} -y {args.width} -l {args.level} -s {len(data)} -p {len(packets[0])}", end="")
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def frame(packet):
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