Non-Destructive Image Editing

Questions

Part I – The Evolution of Non-Destructive Imaging Define ‘Non Destructive Imaging’ This refers to imaging processes where the source image may be adjusted in a way that leaves the original data intact. List four challenges introduced by digital photography :-  The creation of a vast number of photos.  The need to apply identical adjustments to many photos in one operation.  The need to interpret a single source image in multiple ways (black and white, and colour, for instance). The desire to take advantage of rapidly evolving imaging technology to reinterpret images with more capable software in the future. What is meant by a ‘Derivative File’ ? This refers to a version of the photo file that has had some adjustments incorporated—which is called a derivative file, since it’s derived from the original. What are two problems with using ‘Save As …’ to create derivative files ? The creation of multiple variations of a photo could bring great confusion The entire file needs to be resaved, even small changes require resources to duplicate and archive the entire file which takes up a lot of storage space. What is ‘Self Referenced Non Destructive Imaging’ ? Refers to when adjustment layers were introduced, and it became possible to wrap up the source image with a set of instructions (or many sets of instructions) for rendering the photo. An adjustment layer is the instruction that tells the software how to manipulate the image and applies these instructions to the image. This is information that is saved as metadata, and doesn't change the source file. Source File + Instructions = Final Appearance. List two advantages of Self Referenced NDI over the use of Derivative Files :- Much more economical in terms of storage. Is much easier to sort out what has been done to an image Define ‘Parametric Image Editing’ : Refers to the editing of images by creating instructions or parameters. What is the difference between a Live Rendering and a Fixed Rendering ? A live rendering is a view of the image that only exists when the source image is loaded into the software, whereas fixed rendering refers to any image that has its rendering described in pixel information, such as an RGB or a grayscale value, we can view this as a jpeg, where all edits have been locked in and can no longer be undone.  List three advantages of NDI : a.        Saves money                                                                                                          b.        Saves Time                                                                                                                                     c.        Allows Creative freedom

Presintation Tutorial - Airbrushing

The Tutorial that I completed and decided to do my presintation on was Airbrushing.

In this tutorial, I learnt how to airbrush skin whilst keeping a natural looking texture, so that it doesnt look too fake.

Here are the before and after images of my tutorial:

                                       BEFORE                                                     AFTER

The instructions to this tutorial by 'Admin' can be found on:

http://tutorialpulse.com/49/superb-skin-airbrush-technique/

Excercise 4 - Colour Theory 2

Tasks

1.       Start Photoshop and open the document you created in Exercise 3. ·         What is the keyboard shortcut for opening an existing Document ? - Ctrl + 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 Additive 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 Subtractive Colour System. 19.   Add a text layer saying ‘<name> Colour System’. 20.   Save the document as ‘Ex 4 – Primary_Colours.psd’                   Additive and Subtractive Colour systems

Excecise 3 - Colour theory

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 ?      Ctrl + N 3.       What is the size of the image in :- §  Megapixels - 8.6       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 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 ? -  ctrl + 0 14.   Go to Full Screen Mode – ‘View -> Screen Mode ->Full Screen Mode’. ·         What is the keyboard shortcut ?  - F 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 Cyan Green Magenta Blue Yellow 16.   Select all three layers in the layers palette. 17.   Group the three layers together by selecting ‘Layer -> Group’. ·         What is the keyboard shortcut ? – Ctrl + 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 red Magenta green Yellow blue 21.   Save the document as ‘Ex 3 – Colour Theory.psd’ 22.   What is the size of the .psd file on disk ? – 1.26MB How does this compare to the image size you recorded in step 3 above? – It is much larger                                                                First Test Second Test

Digital Workflow

	1	2	3	4	5	6	7	8
Stage	Deal with client	Capture images	Uploading to computer	Sort and select	Basic editing	Advanced editing	Preparing files	Deliver to client
Tasks	Brief – contract (Copyright, price, end use of images, number of images, location, timeline)	File types (RAW, JPEG or both), Colour space (adobe RGB rec.), equipment needed (lenses, lighting, cards, batteries etc), logistics (location, models etc)	Thru camera, card reader, wifi, tethered capture, may convert uploaded files to DNG, add metadata Software (Lightroom, Bridge, file browser,	Reject duds, rate images, create collections, flag/colour labels Software – Lightroom and Bridge, Aperture	Colour correction, sharpening, cropping, straighten, tonal correction, lens aberration correction, exposure, dust spotting, noise reduction Software – Lightroom and Bridge	Skin corrections, changing shapes of faces, panoramas, HDR, montages, Software - Photoshop	Resizing files, resolution, file naming, file types	Payment J J - prints, digital files  on CD, albums, online lab service
Backup			1st Backup	Or 1st Backup here	2nd backup	Or 2nd Backup here	Final backup
Notes						Save in PSD format to keep layers.