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CUADIG303 Prepare and produce photo images, Composition, File Format,…
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Composition
Rule of thirds:
Grid - 2 vertical and 2 horizontal lines all spaced evenly apart, 9 equal zones.
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when you place your subject or focal point on the lines, particularly where they meet or intersect, you will take a more aesthetic shot.
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Leading lines:
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Don't need to be straight lines, can be curved.
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Good composition:
A way of using techniques that helps create images that are visually pleasing and successfully conjure up the emotions and memories of a specific location or event.
Keep it simple:
The less visually cluttered an image, the more powerful it becomes.
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File Format
JPG / JPEG:
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Lossy compression: as you further compress the image file, the quality of the image decreases.
Good format for printing detailed/colourful illustrations as it supports 24-bit colour (16,777,126 possible colours are available).
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Ideally, the final image should be saved into the size it is required.
PNG:
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As it produces high quality imagery, it produces sharp edges therefore it support images with text.
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PNGs are lossless and file size can be minimised, therefore they are ideal for web graphics.
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Raster images:
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JPEG, GIF and PNG are raster image extensions.
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If the image is resized, then potentially will become blurry or distorted.
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GIF:
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Ideal for images that include flat, solid blocks of colours (no gradients).
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BMP:
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Lossless compression: individual pixels of colour are saved without compression. Thus, compression makes little difference to the size of the file.
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Ideal for printing, however, due to large file size, not appropriate for web graphics.
Vector images:
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AI, PDF and SVG are vector image extensions.
Allows you to create graphics that require resizing (logos, for example).
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Depth of Field:
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Point and shoot cameras and phone cameras generally have large DOF but shallow DOF can be achieved using 3 techniques.
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Exposure
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All elements are expressed as a series of numbers, each half or double of the one before.
They are called stops.
Stops use a half or doubling sequence. Take a stop, Give a stop..)
Exposure setting rule:
If one element is altered, one of the other settings must also change if the same exposure is to be retained.
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Def: governs whether the photo is too dark, light or just right.
Focus
Setting auto focus:
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Full press, without releasing button, takes shot.
Unable to get camera to focus on right object - set focus on another object in image with half press of shutter button then move the camera and reposition focus area on object.
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