vadimkantorov’s gists

vadimkantorov / svgheatmap.py

Last active December 21, 2021 21:10

Python script for drawing a heat map in SVG, with a jet colorbar

	import base64
	import numpy as np
	import cv2

	def svg(tensor, K = 10, font_size = 0.03):
	min_score, max_score = tensor.min(), tensor.max()
	labels = np.arange(min_score, max_score, float(max_score - min_score) / K)
	bgr_image = cv2.applyColorMap((tensor - min_score) * 255. / (max_score - min_score), dtype = np.uint8), cv2.COLORMAP_JET)
	bgr_jet = cv2.applyColorMap(np.arange(255, dtype = np.uint8), cv2.COLORMAP_JET).squeeze(1)

vadimkantorov / ffmpeg.py

Last active May 3, 2022 16:40

Simple python FFmpeg pipe wrapper for reading videos

	# print(next(iter(FFmpeg('video.mp4')))[0].shape)
	# (480, 640, 3)
	# print(next(iter(FFmpeg('video.mp4')))[1])
	# 0.0799333

	import subprocess
	import json
	import re
	import numpy as np

vadimkantorov / sitecustomize.py

Last active January 3, 2018 23:12

A trick to make certain Python3 modules available in Python2 without modifying the original Python3 code. It suffices to place sitecustomize.py along with original code.

	import sys
	import urllib
	import urlparse

	sys.modules['urllib.request'] = type('', (object, ), dict(urlretrieve = staticmethod(urllib.urlretrieve)))
	sys.modules['urllib.parse'] = type('', (object, ), dict(urlparse = staticmethod(urlparse.urlparse)))

vadimkantorov / compact_bilinear_pooling.py

Last active September 22, 2021 07:51

Compact Bilinear Pooling in PyTorch using the new FFT support

	# References:
	# [1] Multimodal Compact Bilinear Pooling for Visual Question Answering and Visual Grounding, Fukui et al., https://arxiv.org/abs/1606.01847
	# [2] Compact Bilinear Pooling, Gao et al., https://arxiv.org/abs/1511.06062
	# [3] Fast and Scalable Polynomial Kernels via Explicit Feature Maps, Pham and Pagh, https://chbrown.github.io/kdd-2013-usb/kdd/p239.pdf
	# [4] Fastfood — Approximating Kernel Expansions in Loglinear Time, Le et al., https://arxiv.org/abs/1408.3060
	# [5] Original implementation in Caffe: https://github.com/gy20073/compact_bilinear_pooling

	# TODO: migrate to use of new native complex64 types
	# TODO: change strided x coo matmul to torch.matmul(): M[sparse_coo] @ M[strided] -> M[strided]

vadimkantorov / image2urijpeg.sh

Last active June 1, 2023 17:52

Convert an image to Base64 data-uri format using ImageMagick and OpenSSL

	# Usage:
	# bash image2urijpeg.sh image.jpg 320x240 > base64.txt # will resize before conversion
	# bash image2urijpeg.sh image.jpg > base64.txt # will keep original size

	magick "$1" -resize ${2:--} jpeg:- \| openssl enc -base64 -A \| sed -e 's/^/data:image\/jpeg;base64,/'

vadimkantorov / gifcast.cmd

Last active June 16, 2018 00:53

Record a GIF screencast on Windows using FFmpeg

ffmpeg -y -video_size 800x600 -offset_x 10 -offset_y 120 -framerate 5 -show_region 1 -f gdigrab -an -i desktop -vf scale=320:240 output.gif

vadimkantorov / genpass.sh

Last active June 23, 2020 12:04

Generate a random password

	echo $(< /dev/urandom tr -dc _A-Z-a-z-0-9 \| head -c10)

	alias genpass='echo $(< /dev/urandom tr -dc _A-Z-a-z-0-9 \| head -c10)'

vadimkantorov / env.sh

Last active May 21, 2019 13:51

Install PyTorch for CUDA 9.0

	PREFIX=$PWD/env

	export CUDA_HOME=/usr/local/cuda-9.0
	export CMAKE_PREFIX_PATH=$PREFIX
	export LD_LIBRARY_PATH=$PREFIX/lib:$LD_LIBRARY_PATH
	export CPATH=$PREFIX/include:$CPATH
	export PATH=$PREFIX/bin:$CUDA_HOME/bin:${PATH//"/home/cvlab/anaconda3/bin"/}
	export CUDNN_LIB_DIR=$PREFIX/lib
	export CUDNN_INCLUDE_DIR=$PREFIX/include

vadimkantorov / jlabnopass.sh

Last active December 7, 2020 09:18

Start JupyterLab server without password

	jupyter lab --NotebookApp.token=''

	alias runjupyter="jupyter lab --NotebookApp.token='' --port 6006 --no-browser --ip=\"0.0.0.0\" --allow-root --NotebookApp.iopub_msg_rate_limit=1000000.0 --NotebookApp.iopub_data_rate_limit=100000000.0 --NotebookApp.notebook_dir=/"

	alias mapports='ssh -L 7006:localhost:7006'

vadimkantorov / prettifyjson.sh

Created August 13, 2018 18:23

Prettify json files in Python3 processing correctly UTF-8

	# prettifyjson input.json > output.json

	alias prettifyjson='python3 -c "import json, sys; json.dump(json.load(open(sys.argv[1])), sys.stdout, ensure_ascii = False, indent = 2)"'

Vadim Kantorov vadimkantorov