To work in a professional way, we need to work in a non destructive transformation. A destructive transformation is when something is irreversible.
There are different paper sizes, print and web, that we can choose from.
When we make a new document it has to be the same size as the image that you are going to create/edit, as it does not work with vector graphics, but with bitmap. Bitmap is made out of pixels, so if you enlarge an image in Photoshop it will pixelate.
Resolution
300 for print
72 for web
A billboard is made up of 48 sheets.
A bus advertisement is made up of 12.
Because these are such large scale, a bigger resolution than 300 would be used.
Retina displays now have a lot more pixels, meaning a lot more pixels are needed.
Colour Mode
RGB is colour made out of light
CMYK is made out of ink and toner
A lot of the colours used in CMYK, are not available in RGB, so if working for both screen and print, it is best to use the RGB Colour option.
Another reason we work in RGB Colour, is that we are working on screen, so what we are seeing isn't CMYK, as the colours cannot be reproduced on screen.
When using a camera, it captures photographs in RGB, because it captures light into the lens.
A Proof is something that you can use to check what your ideas will look printed like in a quick and easy way.
The Gamut is the range of colours that a colour model is capable of doing.
This shows what parts of the image are out of gamut.
To alter this in a non destructive way, we keep the gamut screen on, and make an adjustment layer. We can then change a lot of the options to reduce the gamut, which is how it would look in print.
We desaturated it a little bit, but to keep it bright we changed the colour to red as that works better.
We then started to work on a different image, and this is the original:
We wanted to increase the detail in areas of the image.
We created an adjustment layer, and started to change the layers.
The black triangle represents the shadows
The grey triangle represents the midtones
The white triangle represents the highlights
As there are certain areas we want to change, we are going to create a layer mask, so that adjustment layer won't apply to those areas. Once we've done that, we can change the levels, and using the paintbrush, paint were we want that to apply.
Now there is a lot more detail in the image.
For the next image, we want to make the shadows a lot higher:
I used the Quick Selection Tool to highlight the statue, then added an adjustment layer. I chose Levels, and when I altered the highlights, it dramatically increased the lightness and detail in the statue.
We are now going to make a panorama image in Photoshop. I went on File > Automate > Photomontage, and chose these settings:
Then I clicked okay, and it connects the three images like this:
I then cropped it:
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