All right you I don’t have much time but I’m about to do a time-lapse of the sunset which is kind of already set okay a picture every eight seconds you know so here’s the deal right our cameras setting is on manual it’s gonna get way darker on the camera so I’m just gonna adjust the setting once it gets.
Too dark you know my lens is broke but look at this pack it up wait wait wait wait that’s that’s the wrong one that’s the before wait okay this is the after know what’s good guys get the hoodie you gotta get the hoodie on if you’re.
A hacker you oh we have 600 raw photographs the pictures get darker and darker and darker and then BOOM oh my god that.
Is so bright I’m gonna make this shot look good and then I sync.
Every single setting save metadata to file it creates a XMP file for every image how convenient you can see it’s getting darker and then there’s like setting change my program is going to.
Automatically detect the changes hopefully oh the metadata update oh yeah we import our pictures what did you guys think of that time-lapse you know and now you’re probably wondering how the hell did you do.
This image processing at this point we know nothing all right two years ago Devon has no idea how to do anything I’m just.
Sitting here and I’m going how am I supposed to determine how bright this picture is and so I’m going through.
Some settings and I just see something that says metadata I expected it to should be like random characters and I open it shutter speed value F number aperture value I started to realize oh.
My god all of these things are settings that you can apply to an image in Photoshop like look saturation sharpness luminance so wait wait let me take a step back I took this picture and then I went down one stop that’s what photographers say I always thought that’s just like a photographer’s saying you know what I mean this is the crazy thing we need to apply.
A plus one exposure to this picture you can’t.
Tell the difference also you can look at the histogram look slightly different but look at how close they are right I’m not playing with you all right I’m gonna make this negative two point three one four or.
Five something very specific save the file open with Photoshop yeah so two point three one it rounded it anything that is written in this file Photoshop will use when it opens up the picture the ISO equals log of the current I so log 800 divided by next iso divided.
By 400 divided by log 2 would you look at that it’s exactly 1.
000 all of these formulas are the exact same except this.
The root to only two pictures here i broke it.
What duff what do you think it doesn’t work with two pictures we don’t look at the code everything revolves around this image class basically it stores all the data about a single image oh and.
Then this is something that’s actually really important updates XMP file of all images within the change sequence it actually iterates all of the images grabs the XMP file and then it replaces the key so right now I can replace the exposure.
Or I can replace the temperature based on what I give it here it’s gonna actually write the new file this is just like setting up the object so.