Would you like to inspect the original subtitles? These are the user uploaded subtitles that are being translated:
1
00:00:01,911 --> 00:00:05,900
In this clip we're going to review what is color spill.
2
00:00:05,901 --> 00:00:07,951
So what exactly is color spill?
3
00:00:07,951 --> 00:00:12,754
Well it occurs when the color reflects off of the back screen or off of the
4
00:00:12,754 --> 00:00:16,961
backing region and casts a noticeable tint on your subject.
5
00:00:16,961 --> 00:00:19,901
Certain areas of your model or, in this case,
6
00:00:19,901 --> 00:00:23,871
the foreground subject, absorb or reflect that color,
7
00:00:23,871 --> 00:00:25,931
which is typically blue or green.
8
00:00:25,931 --> 00:00:28,747
It's kind of like throwing a ball against a wall and the
9
00:00:28,747 --> 00:00:31,891
ball bouncing back off to hit another wall.
10
00:00:31,891 --> 00:00:34,961
In this case, the light bounces off of the blue screen or the green screen,
11
00:00:34,961 --> 00:00:38,941
and then throws its color onto the subject.
12
00:00:38,941 --> 00:00:41,870
So this is a green screen that we're working with,
13
00:00:41,871 --> 00:00:44,941
and let's take a look at what that spill looks like in more depth.
14
00:00:44,941 --> 00:00:48,880
So I have pulled a really quick key over here,
15
00:00:48,881 --> 00:00:54,871
and I'm going to look at it premultiplied against a non-despilled plate.
16
00:00:54,871 --> 00:00:55,920
So here we can see the spill.
17
00:00:55,921 --> 00:00:59,927
It's very obvious here on the edges, where there's transparency,
18
00:00:59,927 --> 00:01:04,883
some over top of these areas which reflecting quite heavily against the
19
00:01:04,883 --> 00:01:09,900
black chair and in the transparent bottle over here.
20
00:01:09,901 --> 00:01:13,890
Let's take a look at what that looks like with a despill.
21
00:01:13,891 --> 00:01:16,961
So again, it's causing some issues on these edges here,
22
00:01:16,961 --> 00:01:18,911
that's where it's most noticeable.
23
00:01:18,911 --> 00:01:22,940
It's working over here in the chair, so that's really great for the despill.
24
00:01:22,941 --> 00:01:25,850
But we can see that it is, again,
25
00:01:25,850 --> 00:01:31,870
the biggest problem with our transparent edges or anything that has motion blur,
26
00:01:31,871 --> 00:01:33,880
reflections, and so forth.
27
00:01:33,881 --> 00:01:36,891
So those are the things to really look out for.
28
00:01:36,891 --> 00:01:39,489
Now there's one other thing that I do want to look at before
29
00:01:39,489 --> 00:01:44,930
we get into just despill in more depth, and that is a spill matte.
30
00:01:44,931 --> 00:01:49,871
So if we take the original image and we despill it,
31
00:01:49,871 --> 00:01:53,941
so this is a temporary despill, and we do a minus operation,
32
00:01:53,941 --> 00:01:56,921
this is what our spill is doing.
33
00:01:56,921 --> 00:01:59,911
So here is an exaggeration of our spill.
34
00:01:59,911 --> 00:02:04,881
I've just cranked up the gamma over here temporarily,
35
00:02:04,881 --> 00:02:05,961
and this is what it looks like.
36
00:02:05,961 --> 00:02:08,951
So we can see, again, this is where the spill's occurring,
37
00:02:08,951 --> 00:02:12,931
on the bottom side of the chair, on the back of the chair,
38
00:02:12,931 --> 00:02:15,870
and on the back of our subject.
39
00:02:15,871 --> 00:02:20,207
And this matte really allows us to push the despill and the color correction of
40
00:02:20,207 --> 00:02:24,931
the backing region and of the spilled regions even further.
41
00:02:24,931 --> 00:02:29,930
So the spill matte, or in some cases it's called a spill map,
42
00:02:29,931 --> 00:02:35,961
can be used to enhance that despill in more complex workflows.
43
00:02:35,961 --> 00:02:40,920
So now that we have a brief overview of what spill is,
44
00:02:40,921 --> 00:02:47,941
let's take a look at some basics of despills in our next clip.
4050
Can't find what you're looking for?
Get subtitles in any language from opensubtitles.com, and translate them here.