Poject 1 – Tut 2

Tutorial 2 – Increasing Contrast in the Iris

Source: Professional Portrait Retouching techniques for Photographers using Photoshop by Scott Kelby, 2011, Published by New Riders

All text and images © Scott Kelby

This is a very simple tutorial using Blend Modes and Layer Masks. Images are available online allowing me to download the image, I’ve cropped the original full face image to just concentrate on the eyes. Downloads can be found at:

www.kelbytraining.com/books/retouching

Starting Image:

Finished Image:

Instructions

(click on page to see larger text)

Exercise 4 – Colour theory 2

	Imaging 2
f	Exercise 4 – Colour Theory 2
Names	Paul Livingston
	§       This is a formative assessment instrument §       You must be rated ‘Competent’ in this assessment item.
Tasks	1.     Start Photoshop and open the document you created in Exercise 3. ·       What is the keyboard shortcut for opening an existing Document? Cmd + o 2.     Change the Blending Mode of the layer Group to ‘Pass Through’. 3.     Make the background layer the working layer by selecting it in the Layers palette. 4.     Use the Rectangular Marquee tool to select the top half of the image. 5.     Use the Paint bucket tool to fill this area with Black. ·       What is the keyboard shortcut for this tool ? g          6.     Change the Blending Mode of the ‘Red Circle’ layer to ‘Lighten’. 7.     Do the same for the Blue and Green Circle layers. 8.     Select the Move tool. ·       What is the keyboard shortcut for this tool ?             v          9.     Turn on the ‘Auto-select’ option and set it to ‘Layer’ (Not ‘Group’). 10.  Drag the three circles so they all overlap each other. 11.  This simulates the     Addative                        Colour System. 12.  Rename the group of circle layers to indicate this. 13.  Add a text layer (using white text) saying ‘<name> Colour System’. 14.  Select the group of circles in the layers palette. 15.  Duplicate the group using ‘Layer -> Duplicate Group …’. 16.  Use the Move tool with ‘Auto-Select’ set to ‘Group’ to drag the new group to the bottom half of the page. 17.  Change the Blending Mode of the this group to ‘Difference’. 18.  This simulates the     Subtrative                      Colour System. 19.  Add a text layer saying ‘<name> Colour System’. 20.  Save the document as ‘Ex 4 – Primary_Colours.psd’

Exercise 3 - Colour Therory 1

	Imaging 2
f	Exercise 3 – Colour Theory 1
Names	Paul Livingston
	§       This is a formative assessment instrument §       You must be rated ‘Competent’ in this assessment item.
Tasks	1.     Start Photoshop and create a new document with the following properties :- ·       Name : ‘Ex 3 – Primary Colours’ ·       Size : A4 @ 300dpi ·       Colour Mode : RGB / 8 bpc ·       Background Colour : White 2.     What is the keyboard shortcut for creating a new Document ? Cmd + N 3.     What is the size of the image in :- §       Megapixels -            8.7       Megabytes 24.9  4.     Set the foreground colour to Red (ie R 255, G 0, B 0). 5.     Select the Ellipse Tool (not the Marquee tool). What is the keyboard shortcut :- u 6.     Draw a circle with the Ellipse tool approximately 6cm in diameter (about 1/3rd of the page width) – display the rulers and use Preferences to set the units to cm . ·       Which key forces the ellipse to be a circle ?            Shift key 7.     Change the layer name to ‘Red Circle’. 8.     Duplicate the layer and ·       change the colour to green and ·       change the name to ‘Green Circle’.          Note: To change the colour click on the colour button on the option bar immediately after duplicating the layer, or double click on the layer in the Layers palette. 9.     Duplicate this layer and ·       change the colour to blue and ·       change the name to ‘Blue Circle’. 10.  Select the Move tool. What is the keyboard shortcut ?   v 11.  Turn on the ‘Auto-select’ option. 12.  Spread the three circles across the top of the page with a small space above them (they may overlap a bit – that’s OK). 13.  Fit the image to the screen (ie so the whole page is visible). ·       What is the keyboard shortcut for this ? Cmd + 0 or double click Hand Tool 14.  Go to Full Screen Mode – ‘View -> Screen Mode ->Full Screen Mode’. ·       What is the keyboard shortcut ? There is none 15.  Stare at the centre of the middle circle for 20 seconds, then look at the white area below. You will see an after image. ·       What colour are the after images for each circle ? Circle After Image Colour Red White Green Pink Blue Orange 16.  Select all three layers in the layers palette. 17.  Group the three layers together by selecting ‘Layer -> Group’. ·       What is the keyboard shortcut ? Cmd + G 18.  Select the group in the layers palette containing the three circles. 19.  Change the ‘Blending Mode’ for the group from ‘Pass Through’ to ‘Difference’. (We will be looking at Blending Modes later, so don’t worry if you don’t understand them now). 20.  Stare at the centre of the middle circle for 20 seconds, then look at the white area below. You will see an after image. ·       What colour are the after images for each circle ? Circle After Image Colour Cyan None Magenta Green Yellow None 21.  Save the document as ‘Ex 3 – Colour Theory.psd’ 22.  What is the size of the .psd file on disk ? 24.9    How does this compare to the image size you recorded in step 3 above. Exactly the same size.

Project 1 Tut 1 – Image Editing Skills – Perspective

Viewed 1 August 2011][Soruce ‘The Perfect Photo Blog’ http://www.perfectphotoblog.com/lens-distortion-and-perspective-correction-in-architecture-photography/414/

Lens distortion and perspective correction in architecture photography

This article is for those who do not have a tilt shift adapter or TS lens and still do architecture photography. I’ll show you how to correct perspective distortion using Photoshop. Camera lens distortions occur frequently when taking pictures of architectural subjects with a wide-angle lens and the need to use an external program. Distortion will always have place when  we shoot tall buildings, tilting the camera upwards.  There is no way (unless you have TS adapter or lens) to get  vertical lines to be vertical on a picture, as it will fall in the middle.

However, you can easily correct camera lens distortions using Photoshop or other photo software.

Below you can find list of software for lens distortion and perspective correction and tutorial how to fix it in Adobe Photoshop

How to correct perspective distortions of an image using the Adobe Photoshop Free Transform Tool.

Before lens distortion and perspective correction

 

After lens distortion and perspective correction

All you have to do is:

Step 1 Open the photo in Adobe Photoshop.

Step 2 Duplicate layer

Step 3 Create Guides Lines

View -> Rulers

Create  vertical and/or horizontal guide lines by dragging a vertical (and/or horizontal) guide lines from the vertical (and/or horizontal) white ruler on the left (top) side of the window.

Using rulers in Photoshop

Step 4 Edit ->Free Transform

Select the upper right corner handle and click and hold down, then hold down Control key and drag the handle to the right  until building walls become parallel with guide lines  correcting the tilting perspective, than the left corner move to the left.

While this technique brings the perspective to a normal view, it also has the effect of shortening the buildings. To correct this, grab the center bottom handle and drag it down until the buildings look their correct height.

Using Free Transform tool in Photoshop

As a result we have straight lines:

Now we have straight lines

Original Image

Adjusted Image

(Paul’s comments: After fixing perspective you many want to crop the photo using the cropping tool, which I did in my example. )