Sunday, 25 November 2012

Lab 6: Image Manipulation

Welcome to my lab on image manipulation. The chosen software to perform this Lab is Adobe Fireworks. My first step was to download the image I was instructed to use in this process and open it in the fireworks software.

The image appeared as seen below. It was an image of a church with a backdrop of a blue sky at a sideways angle. In this blog I am going to explore the various different ways, using fireworks, that I can edit the appearance of this image.


Firstly, I identified that the angle the image was at was unhelpful and inconvenient to the viewer. For the viewer to look at the image in its natural state they would have to turn sideways. Thankfully, in fireworks, there are features which can help you get round this. I was able to rotate the image by 90 degrees, which made a lot easier, clearer and user friendly. There are various other angles you can rotate images by in fireworks, in both clockwise and anti-clockwise directions, but I decided that 90 degrees was the most fit for purpose for this lab.


After I had edited the image to show it at a better angle, my next task was to show some of the custom filters that fireworks has to offer. The two I decided to work on were motion blur and invert colours. Firstly, motion blur creates the illusion that the image was taken at high impact, such as by someone on the move. The result of this is that the detail of the image is highly compromised, as you can see below. The time on the clock is more difficult to make out and the individual bricks aren't quite as visible.


The next filter I chose to try out was inverting the colours. This operation makes the colours in the photograph transform so they are complete opposites of each other. This leaves the image looking far from natural.


After this I decided to edit the brightness of the photograph to see the results from that. The brightness is set zero in its default state, so I first decided to edit the image to so that it was at its minimum brightness, which on the Fireworks package is -100. The reduction in brightness gave the image the appearance that it was taken just prior to sunset, as it dulls the sky in a way that gives it a night-time feel.


My next step was to try the complete opposite of this, by increasing the brightness to maximum level, which expectedly is 100, given minimum level is -100. This transformation as shown below makes the image appear as if it was taken in broad daylight, at the time where the sun was at it's most prominent. Although the first image appears as if it was taken in daylight, this one increases that effect dramatically as is shown by the clearly visible change in shades of the blue sky.


My next step was to edit the contrast of the image. I first gave it the maximum contrast. This virtually removes all aspects of the image and gives it an animated, almost cartoon like vibe.


Next I went for the opposite effect by reducing the contrast as far as possible. Unlike the brightness, it was not possible for me to reduce the contrast as dramatically as -100 as that simply just makes the image appear totally grey and doesn't give as good an indication of the influence of reduced contrast as setting it to -85 like I did below. This shows how a reduction in contrast really makes the images dull, the sky becomes darker and less visible, as do all of the elements involved.

For me, there are various reasons these types of filtering could be used for the processing of digital images. The image may have been taken at an undesired time of day or in undesired weather conditions. Editing the brightness can give the image the appearance that it was taken at a different time of day and in different amounts of sunlight. By the same effect, reducing the contrast can aid this too, due to its dulling effects. Adding contrast can also aid the process, to an extent, but excessively doing so makes the image appear unnatural, although it could be argued this could be another potential use for filtering, as the user may be trying to obtain an unnatural and animated effect from the image. Filtering could also be used to accentuate a particular part of an image.









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