Color Mode Exercise

RGB

This is a regular picture saved in rgb (red,green, and blue) color mode. Its uncompressed file size is 68.7m # of colors is 256.

Indexed Color

It is the same picture but I changed the color mode via Photoshop > image > mode > indexed color. The uncompressed file size 1.83m with 9 colors total.

Grey scale

It looks similar to indexed color except grey scale uses all 256 all the time. The uncompressed

file size is 1.83m with 256 colors.

Bitmap(color mode)

Bitmap has on two colors (black/white) you can get to this by change the image to grey scale then bitmap. The uncompressed file size is 234.4k with only to 2 colors.

 Pre-quiz

Can you change FILE FORMAT  just by changing the name?

 You can not change a file format by changing its name it doesn't work. 
 What is the # of colors in each Color Mode?

•  RGB: 256 
• indexed color: 0-256
• grey scale: 256
•  Bitmap: 2 

What happens to the (uncompressed) FILE SIZE as you change the COLOR MODES?
Changes the amount of data for the file.
What happens to the visual quality of images as you REDUE the # of colors by changing the color mode?
It changes the amount of color and data.
What is a good reason to convert PSD files to JPG?
When delivering a file .