Tuesday, May 10, 2011
Tuesday, May 3, 2011
Tuesday, March 22, 2011
Monday, March 21, 2011
Panorama Exercise
I did this panorama the manual way by putting all 5 images onto one canvas then adjusting and distorting as required. This is the method i have used ever since i started making panoramas. I find the automated way in photoshop tends to have strange effects and warps the the final image. The subject matter are my own photos taken from a roadside store window in Kintamani looking at the Ganung Batur Volcano in 2010.
Progress in Photoshop CS4
The red X is approxamatelywhere I shot the photo from.
Colour Management Review Questions
1. What is the purpose of colour management ?
To ensure that colours remain accurate when they are used by devices or programs with different colour profiles or spaces
2. What problem makes colour management necessary ?
Different programs and devices can have different colour spaces (e.g. Adobe RGB/ ProPhoto RGB), which may not have the same gamut of colours
3. What are the components of a device profile (ie what information do they contain) ?
Colour space, gamut, colourants and modes of operation
4. What is the difference between a device profile and a working space ?
Working spaces (sRGB, Adobe RGB) each have different sized gamuts, you can switch between working spaces.The device profile contains info about a particular device’s colour gamut.
5. What is a ‘reference colour space’ and how are they used ?
Give an example of one.Colour models are within a reference colour space, such as CIELAB and CIEXYZ
6. What is the difference between ‘calibrating’ and ‘profiling’ ?-
Calibration sets the device into its best native state using its hardware controls.- Profiling is the process of measuring and fixing up any remaining inaccuracies in its colour output (http://www.imagescience.com.au/kb/questions/64/Calibration+versus+Profiling)
7. What is a Rendering Intent ?
Adapting some or all of the colours in an image to fit into the gamut of another device (e.g. from monitor to printer)
8. Which Rendering Intents are most useful to photographers, and when would you use each of them ?
Relative or perceptual.Perceptual rendering squashes colours so that they all fit within the gamut, but maintain tonal graduations.Relative rendering fits an image into a colour space by clipping out-of-gamut colours, and leaving in-gamut colours unchanged.
To ensure that colours remain accurate when they are used by devices or programs with different colour profiles or spaces
2. What problem makes colour management necessary ?
Different programs and devices can have different colour spaces (e.g. Adobe RGB/ ProPhoto RGB), which may not have the same gamut of colours
3. What are the components of a device profile (ie what information do they contain) ?
Colour space, gamut, colourants and modes of operation
4. What is the difference between a device profile and a working space ?
Working spaces (sRGB, Adobe RGB) each have different sized gamuts, you can switch between working spaces.The device profile contains info about a particular device’s colour gamut.
5. What is a ‘reference colour space’ and how are they used ?
Give an example of one.Colour models are within a reference colour space, such as CIELAB and CIEXYZ
6. What is the difference between ‘calibrating’ and ‘profiling’ ?-
Calibration sets the device into its best native state using its hardware controls.- Profiling is the process of measuring and fixing up any remaining inaccuracies in its colour output (http://www.imagescience.com.au/kb/questions/64/Calibration+versus+Profiling)
7. What is a Rendering Intent ?
Adapting some or all of the colours in an image to fit into the gamut of another device (e.g. from monitor to printer)
8. Which Rendering Intents are most useful to photographers, and when would you use each of them ?
Relative or perceptual.Perceptual rendering squashes colours so that they all fit within the gamut, but maintain tonal graduations.Relative rendering fits an image into a colour space by clipping out-of-gamut colours, and leaving in-gamut colours unchanged.
Tuesday, March 15, 2011
Tuesday, March 8, 2011
Monday, February 28, 2011
Dramatic Gritty Effect
a. Description of the technique including why it is useful
This technique makes images eye catching and dramatic by giving them a gritty, grimy look. It is done in a more complicated way than just using a high ISO or adding fake grain.
b. The tools used to perform the technique
Brush tool, adjustment layers, blending modes, curves, image flatten, duplication, duplicate filter (ctrl+i) and filters (high pass).
c. Brief description of the processes involved
This technique basically involves blending an image with a duplicate that has been dramatically altered(using a 'high pass' filter). This is then repeated to further dramatise the effect. The colour is changed also using an adjustment layer and then slightly altered with a brush tool to make features such as eyes stand out. The image i used is one i took of my Pop.
Problems: This entire tutorial uses destructive editing techniques! Some tips for making this method non-destrucive are, of course, not flattening the image as the tutorial suggests. The point of flattening in this tutorial is so that an effect can be applied then reapplied for twice the effectiveness. Rather than doing this, a safe option is to simply apply one adjustment layer, then place another on top of the first. Also when using a brush, rather than just painting straight onto the image layer, create a transparent layer to paint onto.
d. Sample images (eg before and after versions of an image).
Tutorial version >
My original:
My Film Grain version:
My Edited version:
Conclusion: This is a very interesting effect. I am actually supprised how well it worked and that it was different to just adding grain. I think rather than just making the the entire image grainy, it accentuates the lines and features. It is not a technique i would use on all my photos but it is an interesting option for playing around with portraits.
e. References used to source the information.
Source: http://photoshopfrenzy.com/?p=94
This technique makes images eye catching and dramatic by giving them a gritty, grimy look. It is done in a more complicated way than just using a high ISO or adding fake grain.
b. The tools used to perform the technique
Brush tool, adjustment layers, blending modes, curves, image flatten, duplication, duplicate filter (ctrl+i) and filters (high pass).
c. Brief description of the processes involved
This technique basically involves blending an image with a duplicate that has been dramatically altered(using a 'high pass' filter). This is then repeated to further dramatise the effect. The colour is changed also using an adjustment layer and then slightly altered with a brush tool to make features such as eyes stand out. The image i used is one i took of my Pop.
Problems: This entire tutorial uses destructive editing techniques! Some tips for making this method non-destrucive are, of course, not flattening the image as the tutorial suggests. The point of flattening in this tutorial is so that an effect can be applied then reapplied for twice the effectiveness. Rather than doing this, a safe option is to simply apply one adjustment layer, then place another on top of the first. Also when using a brush, rather than just painting straight onto the image layer, create a transparent layer to paint onto.
d. Sample images (eg before and after versions of an image).
Tutorial version >
My original:
My Film Grain version:
My Edited version:
Conclusion: This is a very interesting effect. I am actually supprised how well it worked and that it was different to just adding grain. I think rather than just making the the entire image grainy, it accentuates the lines and features. It is not a technique i would use on all my photos but it is an interesting option for playing around with portraits.
e. References used to source the information.
Source: http://photoshopfrenzy.com/?p=94
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