How can I create an image overlay blend mode algorithm like on Photoshop?

64
June 16, 2019, at 1:00 PM

I'm working on a code that should blend 2 images with each other. The effect should be similar to Photoshop overlay blend mode or screen mode.

I tried the following algorithm, unfortunately it does not work:

n[c] = 255 - (((255 - n[c]) * (255 - o[c])) / 255);
n[c + 1] = 255 - (((255 - n[c + 1]) * (255 - o[c + 1])) / 255);
n[c + 2] = 255 - (((255 - n[c + 2]) * (255 - o[c + 2])) / 255);

The following algorithm works, but this is not the effect I need. This effect is similar to Multiply Blend Mode

n[c]=n[c]*o[c]/255,
n[c+1]=n[c+1]*o[c+1]/255,
n[c+2]=n[c+2]*o[c+2]/255;

So, I need an algorithm that allows me to mix 2 images and get the effect like in Photoshop overlay or screen blend mode.

Thanks.

READ ALSO
How to print current location using GPS?

How to print current location using GPS?

I want to print current city, state and countryI used IP tracking but that is not much accurate and displaying me different cities, i want current city

53
react-native : How to format object value properly

react-native : How to format object value properly

I am trying to create an empty objectFirst, each field will have a name with empty values

25
How can I get the innerHTML of a clicked button [duplicate]

How can I get the innerHTML of a clicked button [duplicate]

This question already has an answer here:

29
Function that is intended to return an array is returning undefined. Console.log(array) within function returns the array

Function that is intended to return an array is returning undefined. Console.log(array) within function returns the array

I am trying to write a function that takes an array and returns a new array with all elements shifted n indices to the leftFor example:

72