ANANTHAKRISHNAN U S krishnan793

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krishnan793 / ESP8266_NodeMCU.ino

Created September 12, 2016 16:19

	int RED_LED = 12;
	int BLUE_LED = 13;
	int GREEN_LED = 14;


	void setup() {
	// Initialisation
	pinMode(RED_LED,OUTPUT);
	pinMode(BLUE_LED,OUTPUT);
	pinMode(GREEN_LED,OUTPUT);

krishnan793 / view_picture.cpp

Created April 30, 2015 06:50

Program reads a picture file called boy.jpg in the current folder and displays it. After 1 second it will change to grey scale.

	#include<highgui.h>
	#include<cv.h>

	using namespace cv;

	int main()
	{
	Mat A,B;
	A=imread("boy.jpg"); //Read the image file
	namedWindow("Boy", CV_WINDOW_AUTOSIZE ); //Create a new window to show the image. Name the window as "boy"

krishnan793 / ADC_bash.sh

Last active August 29, 2015 14:16

Print ADC value

	value=$(cat /sys/bus/iio/devices/iio:device0/in_voltage0_raw)
	value=$(echo $value*0.0004394 \| bc)
	echo "$value V"

krishnan793 / BeagleBoneBlack_PushButton_LED.C

Last active August 29, 2015 14:16

BeagleBoneBlack Push Button + LED

	#include<stdio.h>
	#include<unistd.h>

	void Read(char switch_value, char val);
	void Write(char switch_value, char val);
	void Blink(char *led_value, int delay);

	int main()
	{
	char *led_direction="/sys/class/gpio/gpio23/direction";

krishnan793 / GPIO_Blink_LED.C

Last active August 29, 2015 14:16

This program will blink an LED connected to gpio23 of BeagleBoneBlack Board. Inorder for the code to work first set gpio port 23 as output. (echo 23 > /sys/class/gpio/export && echo out > /sys/class/gpio/gpio23/direction))

	#include<stdio.h>
	#include <unistd.h>

	int main(int argc, char* argv[])
	{
	if(argc!=3){
	printf("Syntax: %s <no_of_times_to_blink> <delay_us>\n",argv[0]);
	return 0;
	}
	int delay=atoi(argv[2]);

krishnan793 / BBB_GPIO23.C

Last active August 29, 2015 14:16

	while true
	do
	echo 1 > /sys/class/gpio/gpio23/value
	cat /sys/class/gpio/gpio23/value
	sleep 1
	echo 0 > /sys/class/gpio/gpio23/value
	cat /sys/class/gpio/gpio23/value
	sleep 1
	done

krishnan793 / Dec2Hex.c

Last active January 11, 2020 03:50

Decimal to Hex Conversion using recursion.

	#include<stdio.h>

	void Dec2Hex(int no){
	int hex=0;
	if(!no)
	return;
	else {
	hex=no%16;
	Dec2Hex(no/16);
	}

krishnan793 / Power_Law_Transformation.m

Created December 18, 2014 16:38

Power law transformation of an image.

	%% Power-Law Transformation
	% Equation s=cr^a
	A=imread('401566.jpg');
	A=rgb2gray(A);
	c=1;
	a=2.2;
	imshow(uint8(c*(double(A).^a)));

krishnan793 / log_transform.m

Created December 18, 2014 16:36

Log transformation of an image.

	%% Log Transform
	% Equation s=c*log(1+r)
	A=imread('401566.jpg');
	A=rgb2gray(A);
	imshow(log(double(A)+1));

krishnan793 / linear_transform.m

Last active August 29, 2015 14:11

Linear Transformation or Negative of an Image

	A=imread('401566.jpg'); %Change 401566.jpg with your image file
	A=rgb2gray(A);
	imshow(255-A); %(L-1)-r;L=256(8 bit gray scale)

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