1 00:00:00,330 --> 00:00:04,120 Find Let's go back to normal and let's look at the categories. 2 00:00:04,440 --> 00:00:09,280 The first category you have here is that can multiply and so on. 3 00:00:09,330 --> 00:00:12,730 These are the substracted category. 4 00:00:12,780 --> 00:00:15,270 It means it will substract the colors. 5 00:00:15,380 --> 00:00:23,670 It will darken your pixels or it will remove the light colors or the bright colors. 6 00:00:23,670 --> 00:00:32,160 So like the name says in the beginning it will darken using whatever is beneath and it will create new 7 00:00:32,160 --> 00:00:32,820 colors. 8 00:00:32,880 --> 00:00:34,930 This is very important. 9 00:00:35,040 --> 00:00:43,170 Group or category of modes because this is the one that you will use to remove white backgrounds. 10 00:00:43,260 --> 00:00:47,220 You darken and then the white background can be removed. 11 00:00:47,430 --> 00:00:51,960 If I use multiply here you notice how the colors have changed here. 12 00:00:52,050 --> 00:00:54,050 They became much dark. 13 00:00:54,070 --> 00:01:01,390 Fine let's go to the next category and the next category is about lightning or making it brighter. 14 00:01:01,410 --> 00:01:03,930 You have to add the light and the screen. 15 00:01:03,990 --> 00:01:10,890 All of them will give you a certain intensity or more intensity in the colors and it will lighten the 16 00:01:10,890 --> 00:01:16,530 colors of the source layer using of course the land underneath. 17 00:01:16,530 --> 00:01:22,890 Now this is what we call the additive category and Ill give you very bright colors and this is used 18 00:01:23,010 --> 00:01:30,960 to remove black background is very useful to remove black background or the black spots within your 19 00:01:31,080 --> 00:01:36,120 image or you will move the next category is the overlay category. 20 00:01:36,120 --> 00:01:42,550 I like to call it like this but actually it's called the complex category the complex category meaning 21 00:01:42,570 --> 00:01:46,780 the words on the GLI less than 50 percent. 22 00:01:46,800 --> 00:01:54,570 So if your underlying Lares do not have any gray less than 50 percent the effort here might be completely 23 00:01:54,570 --> 00:01:55,080 new. 24 00:01:55,320 --> 00:02:02,810 But overlay and in most images and videos we have always less than 50 percent grey in certain areas 25 00:02:02,820 --> 00:02:10,290 at least if I apply overlay here you'll notice that the what ever is less than 50 percent grey has been 26 00:02:10,590 --> 00:02:11,330 removed. 27 00:02:11,340 --> 00:02:12,890 It has been lightened. 28 00:02:12,990 --> 00:02:20,910 This is the job of the complex category so this category is extremely useful and overlay itself is a 29 00:02:20,910 --> 00:02:24,050 very nice one that we almost always use. 30 00:02:24,090 --> 00:02:27,770 You can take each one of them and will try them in the next lecture. 31 00:02:27,780 --> 00:02:36,330 But just to show you the hard mix is trying to brighten all the gray areas and also brighten the less 32 00:02:36,390 --> 00:02:37,350 gray area. 33 00:02:37,380 --> 00:02:42,550 As soon as there is less than 50 percent gray each will work very fine. 34 00:02:42,820 --> 00:02:45,720 Good we go to the difference category. 35 00:02:45,720 --> 00:02:48,140 Actually this is called the difference category. 36 00:02:48,150 --> 00:02:51,130 The difference category will make the difference. 37 00:02:51,240 --> 00:02:58,350 It's an algorithm where the result is the difference in colors between the source and the underlying 38 00:02:58,350 --> 00:02:59,110 layer. 39 00:02:59,130 --> 00:03:05,190 It is a very nice and the options that you have here will differ very much difference. 40 00:03:05,190 --> 00:03:08,880 For example is different from divide not just here. 41 00:03:08,880 --> 00:03:09,870 Each one of them. 42 00:03:09,930 --> 00:03:16,350 So there is an algorithm here that will work and we change completely the colors of the source layer. 43 00:03:16,710 --> 00:03:22,450 I will cover the stencil and this is the category that we call the math category. 44 00:03:22,530 --> 00:03:28,230 It will create Amati you know like transmat something like this for all the layer. 45 00:03:28,290 --> 00:03:30,770 Or the layer underneath. 46 00:03:30,810 --> 00:03:33,730 If you use and my unit is here. 47 00:03:33,750 --> 00:03:36,030 It has created some kind of it not. 48 00:03:36,110 --> 00:03:39,330 We will see that in the case and how to use it. 49 00:03:39,480 --> 00:03:47,640 So in summary you have the substracted category where you will substract the colors and make them darker. 50 00:03:47,640 --> 00:03:55,110 Very useful to remove white backgrounds and the difficult category is when you lighten the colors and 51 00:03:55,110 --> 00:03:59,890 it's very useful to remove the black background complex category. 52 00:03:59,910 --> 00:04:04,930 Will work on the 50 percent or less gray and makes a lot of changes there. 53 00:04:04,950 --> 00:04:11,520 Difference category will give you a result where the colors that will appear on the source are the difference 54 00:04:11,520 --> 00:04:17,760 of the original colors of the source and the underlying one and then we have the math category that 55 00:04:17,760 --> 00:04:21,470 will act like a magnet or retract. 56 00:04:21,510 --> 00:04:25,850 This one we have seen for the last years and we see them in detail. 57 00:04:25,920 --> 00:04:27,360 Starting next lecture. 58 00:04:27,600 --> 00:04:29,070 Thank you very much for listening. 59 00:04:29,190 --> 00:04:30,460 I will see you in the next lecture.