Week 4 : 9.3.2011 - Editing Techniques Presentations

Week 4 : 9.3.2011 - Editing Techniques Presentations This week we submitted our calibration reports and also had a one on one discussion with Geoff about our first monitor calibration. We also watched our class mates present there editing techniques. This included:

• Picasu


• Editing between lightroom and photoshop


• Lightroom Presets


• Editing high contrast images

It was very interesting and helpful to learn from my class mates about some different editing techniques.

Presentation - Editing Techniques

Colour Management #1 - Calibrating and Profiling a Display Device

Colour Management #1 - Calibrating and Profiling a Display Device


Calibration #1
2.3.2011


Task: To be respoinsible for maintaining the calibration and profiling of one of the display devices in the photography area for the remainder of this semester. This will involve carrying out an initial calibration/profiling exercise which will be reviewed in class in week 11 followed by three more follow up calibration/profiling exercises at regular intervals during the semester.

1. Each person will be allocated a monitor.

2. You will set the desktop of your allocated computer to the ‘Grey Desktop’ image (available on eLearn).

3. You will perform an initial calibration/profiling of your allocated device and post the results on your blogs before start of class week 4 (9th March). We will review the results in class.

4. You will profile again and post the results by week 6 (23^rd March).

5. You will profile again and post the results b

y week 11 (11^th May).

6. Each time you create a profile you will -

• Capture a screen image showing the results of the calibration ( see below).
• Name the profile ‘YourName_LCD_Monitor_yymmdd.icc’
• Apply the profile to the student login.

Device Used: i1 X-Rite Display

Software: i1 Match

Date Calibrated: 2/3/2011

Settings:

• Advanced Calibration
• Monitor Type: LCD
• White Point: Medium White 6500
• Gamma: 2.2 - Recommended
• Luminance: No change
• Perform Ambient Light Check
• Calibrate

Screen Prints

Ambient Light

Colour Temperature: 4200k (Slightly too warm)

Illuminance: 495 (too light)

Calibration Summary

Before Calibration



After Calibration



ICC Profile Location






Results/Observations:
The ambient light is not ideal. There is a window directly behind the computer as well as overhead lights. The ambient light readings indicated that the colour temperature was slightly to warm. This would be due to the overhead lights but the window light seems to cool this down in comparison to some computers at the front of the classroom facing away from the window are considerably warmer. The illuminance is also too bright in this circumstance.

From the summary given we can see that the target temperature and gamma were both achieved. The graph shows that the red values are correct where as the blue and green values are not ideal.

Week 3 : 2.3.2011 - Lightroom & Stictching

Week 3 : 2.3.2011 - Lightroom & Stitching

What is the purpose of lightroom?

It is a capture tool, workflow tool, a cataloguing system, minor editing and output.

Catalogue vs Browser: A catalogue is a database. Can look at metadata. To use something in catalogue you have to import and then software finds information about file and stores in the database.

All editing in lightroom is non-destructable. Doesn't apple changes to images just records what you have done. Can work on any file type eg. jpg, raw.

Don't need to have multiple files (saves of edits) just have the source file imported into lightroom.

Lightroom Handout

Adobe Lightroom 3 – Develop Module

Adobe Lightroom is a catalogue based digital workflow program. It enables you to import, organise, process and output your images.

The program is totally non-destructive in nature ie it never alters the original image data, but uses metadata to record all adjustments and settings. The program can work non-destructively with JPEG and TIF files as well as RAW files.

1. Zero all the image controls
2. Chromatic Aberration – zoom to 100%
1. Usually check the Red/Cyan fringe, the Blue/Yellow correction is not usually needed
2. Defringe – removes purple blooming around blown out highlights
3. Tonal Correction - Adjust Exposure / Recovery / Fill Light / Blacks / Brightness / Contrast – to optimise the histogram
4. White Balance - Adjust Colour Temperature & Tint – preferably using a White Balance card in a test image.
5. Tone Curve – use to fine tune the tonal corrections
6. Noise Reduction – for the darkest parts of the image – NB Causes loss of image detail !
1. Luminance – smooths out the brightness of the image without altering the colour
2. Colour – evens out colour variation to remove the colour speckles due to high ISO settings + low exposure
7. Presence –
1. Saturation – Increases the richness or intensity of the colours – oversaturation leads to posterisation effects.
2. Vibrance – increases the saturation of unsaturated tones, but tries to leave skin tones alone ie a ‘smarter’ saturation control.
3. Clarity - = Acutance – sharpens local detail and increases local contrast. Mainly affects the midtones.
8. Sharpening – this is applied to the Luminance channel -
1. Amount – the strength of the sharpening,
2. Radius – the no. of pixels used to locate an edge,
3. Detail – Acutance / local contrast,
4. Masking – the edge mask that determines which parts of the image are sharpened – Hold down Option key and drag the Masking slider – White = applied, Black = No change

HSL / Colour / Greyscale – Allows changes in Hue, Saturation and Luminance to ranges of colours in the image.

Stitching

Problems:

• Lens distortion
• Misaligned images
• Changing scene eg clouds, water, people
• Tonal variation
• Paralax Error

Can stitch vertical/as a grid / sphere

Shoot in portrait or landscape

Panorama Tools

Lens: Use prime lenses, Geoff uses 10-22mm

Paralax Error: Background moves relative to any objects in the foreground. Special tripods can fix this problem.