EXERCISE 5

	Imaging 1
f	Exercise 5 – File Types & Sizes
Names
	§       This is a formative assessment instrument §       You must be rated ‘Competent’ in this assessment item.
Learning Outcomes	Learning Outcome 1 - Identify and define a range of file types and describe their uses.
Tasks	1)     Copy the ‘Lesson 6’ folder from the server. 2)     Open the file ‘Img 1 – Ex 5 – Image.tif’  in Photoshop and do the following :-  Select ‘Image -> Image Size …’  :-

1.     Width of the image in pixels
2.     Height of the image in pixels
3.     Calculate the size of the image in Megapixels
4.     What is the specified resolution of the image
5.     Width of the image in cm
6.     Height of the image in cm

Select ‘File -> Save As…’ and save the image in the following formats. Name the files to clearly identify them.

After each save close the image and reopen to save to the next format. Use the Finder/File Browser to record the sizes of the files created.

1)     The original .tif file
2)     TIF file using LZW compression
3)     Photoshop .psd file
4)     Jpeg file – Quality level 12
5)     Jpeg file – Quality level 10
6)     Jpeg file – Quality level 5
7)     Jpeg file – Quality level 1
8)     GIF file – 256 colours  – no dithering
9)     GIF file – 256 colours  – diffusion dither
10)  GIF file – 16 colours  – diffusion dither

Select ‘Image -> Mode -> Greyscale’ to convert the image to a grayscale image & save as

11)  TIF file (no compression)

Select ‘Image -> Mode -> Bitmap’ to convert the image to a bitmap image & save as

12)  TIF file (no compression)