html - Mimic Photoshop RGB levels with CSS and SVG filter -


i've done in past , know exists, reason don't find right (wasted couple of hours no success).

i want mimic photoshop rgb levels via css.

on following image changed middle value 1 0.5.

enter image description here

i wanna same effect (or @ least close possible) css.

i've tried following code: https://jsfiddle.net/txwu3so5/

i need find replacement code effect. actual code affects white color (i don't want that).

<html> <head> <meta charset="utf-8"> <style type="text/css"> .img_02 {     filter: url(#level-50);  } </style> </head>  <body>  <svg xmlns="http://www.w3.org/2000/svg" version="1.1" style="position:absolute;height:0;">     <defs>         <filter id="level-50" x="0" y="0">             <!-- begin of code replace -->             <fecolormatrix type="matrix" values="                 0.5 0 0 0 0                 0 0.5 0 0 0                 0 0 0.5 0 0                 0 0   0 1 0"             />             <!-- end of code replace -->         </filter>     </defs> </svg>  <img class="img_01" src="https://image.ibb.co/kzz41q/image.png" /> <br /><br /> <img class="img_02" src="https://image.ibb.co/kzz41q/image.png" />  </body>  </html>

in photoshop change 1 different values, example: 0.75, 0.5, etc. want mimic somehow css. remembered used code similar above one, thing needs changed replacement code.

[edit 1]

this part of problem. requirement use svg filter tag.

you updating gamma of image here. there built-in filter component in svg that.

<fecomponenttransfer type="gamma" ...>

see demo below.

note: filter doesn't update on chrome, try demo firefox instead

var slider = document.getelementbyid("slider");  var gamma = document.getelementbyid("gamma");  var gammar = document.getelementbyid("gammar");  var gammag = document.getelementbyid("gammag");  var gammab = document.getelementbyid("gammab");    slider.addeventlistener("input", function(evt) {      var slidervalue = evt.target.value;    gamma.textcontent = slidervalue;    gammar.setattribute("exponent", slidervalue);    gammag.setattribute("exponent", slidervalue);    gammab.setattribute("exponent", slidervalue);    });
.img_02 {      filter: url(#level-50);   }
<svg xmlns="http://www.w3.org/2000/svg" version="1.1" style="position:absolute;height:0;">      <defs>          <filter id="level-50" x="0" y="0">              <!-- begin of code replace -->              <fecomponenttransfer>                  <fefuncr type="gamma" exponent="2.2" id="gammar"/>                  <fefuncg type="gamma" exponent="2.2" id="gammag"/>                  <fefuncb type="gamma" exponent="2.2" id="gammab"/>              </fecomponenttransfer>              <!-- end of code replace -->          </filter>      </defs>  </svg>    <img class="img_01" src="https://image.ibb.co/kzz41q/image.png" />  <img class="img_02" src="https://image.ibb.co/kzz41q/image.png" />    <br/>  <input id="slider" type="range" min="0" max="4" step="0.1" value="1"/>  <p id="gamma"></p>


Comments

Post a Comment

Popular posts from this blog

How to understand 2 main() functions after using uftrace to profile the C++ program? -

i trying uftrace profile following simple c++ program: #include <iostream> class { public: a() {std::cout << "a created" << std::endl;} ~a() {std::cout << "a destroyed" << std::endl;} }; int main() { a; return 0; } the profile result this: # uftrace a.out created destroyed # duration tid function 2.026 [ 4828] | __cxa_atexit(); [ 4828] | main() { [ 4828] | __static_initialization_and_destruction_0() { 89.397 [ 4828] | std::ios_base::init::init(); 0.768 [ 4828] | __cxa_atexit(); 93.029 [ 4828] | } /* __static_initialization_and_destruction_0 */ 94.425 [ 4828] | } /* main */ [ 4828] | main() { [ 4828] | a::a() { 11.104 [ 4828] | std::operator <<(); 10.825 [ 4828] | std::basic_ostream::operator <<(); 24.514 [ 4828] | } /* a::a */ [ 4828] | a::~a() { 0.978 [ 4828] | ...
Read more

c# - Update a combobox from a presenter (MVP) -

i using mvp in project, new in mvp. have 2 comboboxes. when select option in combobox, combobox should filled new data. this action in presenter. view 'view1' in presenter, , introduced combobox1 , combobox2 properties in 'view1', because need 'datasource', 'displaymember', 'valuemember' , 'refresh()' in method below. but, when using pattern, enough send property like public string combobox2 { { return combobox1.selectedvalue.tosstring(); } } into presenter not whole combobox. how can solve problem? public void onselectedindexchangedcombobox1() { if (view1.combobox1.selectedindex == -1) { return; } datatable dt = tools.getdatatable("a path"); var query = (from o in dt.asenumerable() o.field<string>("afield") == farmerview.combobox1.selectedvalue.tostring() orderby o.field<string>("anotherfield") select...
Read more

How to put a lock and transaction on table using spring 4 or above using jdbcTemplate and annotations like @Transactional? -

i trying put lock on table while writing on table , if happened in between roll-back . trying convert below code lock table test_g1 read; lock table test_g write; -- begin; start transaction; insert test_g1 values(143); insert test_g values(145); select * test_g1; select * test_g; rollback; select * test_g; unlock tables; how convert above code @transactional spring jdbctemplate code? @transactional(rollbackfor={dataaccessexception.class}) public void test(){ jdbctemplate.execute("insert test1 (id, nam) values (4, 'a')"); throw new dataaccessexception("error") { }; } here trying throw error, insert statement should rollback it's not happening . thanks edit-1 attaching code , doing in jdbcdaoimpl.java , mentioned problem comment above test() . app.java package com.cgiri.javabrains.spring4; import org.springframework.beans.factory.annotation.autowired; import org.springframework.context.applic...
Read more