Photoshop Induction

Photoshop is a pixel based program, meaning the images use small squares of colour rather than vectors. This means that the image can blur because of the amount of pixels in the image. Resolutions are used to work in different ways, 72 resolution is for screen based work, while a 300 resolution is for printing.

Lower resolutions can be used in larger scale work but appear high quality because of the size and the way your eye sees the image.

Optical mixing is where you can take two colours, separately, are next to each other finely but aren't technically mixed would appear mixed because of the way your eye sees it. So using very small dots of colour it can appear a new invented colour but they're actually two separate pigments next to each other. 

Maximum pixels you can have in one image in photoshop is 300,000x300,000, but because of that you would have a huge file size. 

Having a very high resolution on a website creates problems because it makes the website slower. If you own your website you have to pay for the space and pixels. Also if you've got big images that take a while to load no ones going to want to go on that website. 

On Photoshop you can find out the details of the image via, Image then Image Size. Or on the desktop you command and I to get more info. At the bottom of the file on Photoshop if you right click you can find out the width, height, colour mode and bit depth. 

Colour Mode -

RGB, Red Green Blue, which is used for screen and deals with light.

CMYK, Cyan, Magenta, Yellow and Key (black), which is used for printing.

You have to save as RGB and then convert to CMYK to print, because if you save with CMYK you can't get back the information, because Photoshop works by deleting.

Gamut is the range of colours that are visible.

This shows the range of colours available within the colour modes meaning there is a lot more colours you can produce with RGB then CMYK.

In Photoshop when using the sliders in the colour palette,there is a warning triangle that will tell you when you have chosen a printable colour, if you don't pick one you can be moved to the nearest printable colour, so your design stays true went printed. 

Digits are used for the colour picker, apart from with the CMYK because they are a mixture of pigments when it comes to printing. The # section is the computer code for websites, the cube underneath the triangle shows the web safe colours, which will show you the nearest usable colour. 

On Photoshop I've played around with the colour modes to see how the lego is affected, you can tell the difference a lot between RGB, CMYK and the Greyscale. However the green only really changes between RGB and CMYK, its lot brighter in RGB on screen.

RGB

CMYK

Greyscale

Always keep an original because when you change the colour on Photoshop you delete the information, changing the image each time.

Levels and Curves change the black and whites of the colour, Hue and Saturation change the colours of the image, Colour Balance changes the colour as well, allowing you to have more control rather than Photoshop changing it for you.

If you use adjustment layers you can play around a lot more with the effects.