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@royshil
royshil / CompressYUYV2JPEG.cpp
Created Jan 14, 2016
Example of converting a YUYV buffer to JPEG using libJPEG
View CompressYUYV2JPEG.cpp
#include <iostream>
#include <fstream>
#include <vector>
#include <cstdint>
#include <memory>
#include <jpeglib.h>
using namespace std;
@royshil
royshil / gist:6318407
Created Aug 23, 2013
A CMake Find module for FFMPEG that will tear the HD apart looking for the libs and includes ;)
View gist:6318407
# - Try to find FFMPEG
# Once done this will define
# FFMPEG_FOUND - System has FFMPEG
# FFMPEG_INCLUDE_DIRS - The FFMPEG include directories
# FFMPEG_LIBRARIES - The libraries needed to use FFMPEG
# FFMPEG_LIBRARY_DIRS - The directory to find FFMPEG libraries
#
# written by Roy Shilkrot 2013 http://www.morethantechnical.com/
#
@royshil
royshil / cylindricalWarping.py
Last active May 12, 2020
Warp an image to cylindrical coordinates for cylindrical panorama stitching, using Python OpenCV
View cylindricalWarping.py
import cv2
import numpy as np
def cylindricalWarp(img, K):
"""This function returns the cylindrical warp for a given image and intrinsics matrix K"""
h_,w_ = img.shape[:2]
# pixel coordinates
y_i, x_i = np.indices((h_,w_))
X = np.stack([x_i,y_i,np.ones_like(x_i)],axis=-1).reshape(h_*w_,3) # to homog
Kinv = np.linalg.inv(K)
@royshil
royshil / opencv_capture_v4l2.py
Created Mar 4, 2016
A way to set V4L2 camera params for OpenCV, when cv2.VideoCapture doesn't work. This requires the python-v42lcapture module (https://github.com/gebart/python-v4l2capture)
View opencv_capture_v4l2.py
#!/usr/bin/env python
import numpy as np
import cv2
import os
import v4l2capture
import select
if __name__ == '__main__':
#cap = cv2.VideoCapture(0)
@royshil
royshil / downloadPDFs.py
Last active Mar 22, 2020
Download All PDFs in a URL using Python mechanize
View downloadPDFs.py
# This is kind-of based off of this: http://stackoverflow.com/questions/5974595/download-all-the-linksrelated-documents-on-a-webpage-using-python
import cookielib
import urllib2
import mechanize
from time import sleep
import os
import cgi
# A routine to download a file from a link, by simulating a click on it
View segmentation_graphcut_superpixels.py
import cv2
import numpy as np
import matplotlib.pyplot as plt
from skimage.segmentation import slic
from skimage.segmentation import mark_boundaries
from skimage.data import astronaut
from skimage.util import img_as_float
import maxflow
from scipy.spatial import Delaunay
@royshil
royshil / AndroidCamera2TouchToFocus.java
Last active Feb 12, 2020
How to implement Touch-to-Focus in Android using Camera2 APIs
View AndroidCamera2TouchToFocus.java
//Override in your touch-enabled view (this can be differen than the view you use for displaying the cam preview)
@Override
public boolean onTouch(View view, MotionEvent motionEvent) {
final int actionMasked = motionEvent.getActionMasked();
if (actionMasked != MotionEvent.ACTION_DOWN) {
return false;
}
if (mManualFocusEngaged) {
Log.d(TAG, "Manual focus already engaged");
return true;
@royshil
royshil / lap_pyr.py
Created Sep 29, 2017
Laplacian pyramid blending with a mask in OpenCV-Python
View lap_pyr.py
# adapted from http://docs.opencv.org/3.0-beta/doc/py_tutorials/py_imgproc/py_pyramids/py_pyramids.html
import cv2
import numpy as np
def Laplacian_Pyramid_Blending_with_mask(A, B, m, num_levels = 6):
# assume mask is float32 [0,1]
# generate Gaussian pyramid for A,B and mask
GA = A.copy()
@royshil
royshil / copy_tf_headers.sh
Last active Jan 21, 2020
A script to copy Tensorflow headers to build custom C++ applications
View copy_tf_headers.sh
#!/bin/bash
# inspired by a part of: https://github.com/cjweeks/tensorflow-cmake/blob/master/build.sh
#
# Assumes Tensorflow libraries libtensorflow_framework.so and libtensorflow_cc.so were built with Bazel,
# and the ${TF_ROOT}/tensorflow/contrib/makefile/download_dependencies.sh script was executed.
set -o nounset
set -o errexit
set -o pipefail
@royshil
royshil / NRUBSOpenCV.cpp
Last active Oct 7, 2019
Simple 2D NURBS renderer for OpenCV, reading a DXF file.
View NRUBSOpenCV.cpp
/*
* Simple 2D NURBS renderer for OpenCV, reading DXF files
*
* The MIT License (MIT)
*
* Copyright (c) 2013 Roy Shilkrot
*
* Updated: Nov 2016
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
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