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Difference between revisions of "Simple Image Editing, Cropping Suggestions"
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Simple Image Editing, Cropping Suggestions (view source)
Revision as of 22:08, 14 September 2023
, 22:08, 14 September 2023→Flipping (Mirorring), Rotation
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<code>''Nowadays, 16:9, or the widescreen format is the most popular one but keep in mind that anything else but a TV, most display, projectors, require a different aspect ratio. Sometimes your platform will adjust your image, at other times you have to process the image yourself. It is advisable to experiment with different aspect ratios.''</code> | <code>''Nowadays, 16:9, or the widescreen format is the most popular one but keep in mind that anything else but a TV, most display, projectors, require a different aspect ratio. Sometimes your platform will adjust your image, at other times you have to process the image yourself. It is advisable to experiment with different aspect ratios.''</code> | ||
== Flipping ( | == Flipping (Mirroring), Rotation == | ||
Flipping, | Flipping, mirroring and rotation are highly common editing operations required to either correct images or make them usable in specific contexts. Most simple operations can be applied without affecting the original file. The only exception is when carrying out non perpendicular rotations or rotations at other angles than 90 degrees. | ||
Your pictures may need to be flipped vertically or horizontally when you want to show a different position of your subject or show a different scene arrangement. Flipping refers to a change around the imaginary axis of your photo. A horizontal flip ends up with a picture that has the upper and lower side switched while a vertical one ends up with a similar effect, but having the left and right side switched. | Your pictures may need to be flipped vertically or horizontally when you want to show a different position of your subject or show a different scene arrangement. Flipping refers to a change around the imaginary axis of your photo. A horizontal flip ends up with a picture that has the upper and lower side switched while a vertical one ends up with a similar effect, but having the left and right side switched. | ||
Rotations are highly useful operations that are applied to correct the way in which an image is shown, to use a specific part of an image better in another composition or to straighten the image slightly. The most common rotations are in increment of 90 degrees. Such a rotation ends up with a horizontal image being shown vertically or a vertical one shown horizontally. This is highly useful when you need to emphasize a specific part of an image and use it another composition. Considering you still have enough pixels left on the axis on which your picture is required to be very wide, you can successfully make a later crop and end up with a good result. Rotations at 180 and 270 degrees are useful in specific circumstances such as when you want to alter also the orientation of the image more than a simple clockwise or counterclockwise operation would achieve. | Rotations are highly useful operations that are applied to correct the way in which an image is shown, to use a specific part of an image better in another composition or to straighten the image slightly. The most common rotations are in increment of 90 degrees. Such a rotation ends up with a horizontal image being shown vertically or a vertical one shown horizontally. This is highly useful when you need to emphasize a specific part of an image and use it another composition. Considering you still have enough pixels left on the axis on which your picture is required to be very wide, you can successfully make a later crop and end up with a good result. Rotations at 180 and 270 degrees are useful in specific circumstances such as when you want to alter also the orientation of the image more than a simple clockwise or counterclockwise operation would achieve. | ||
Adjustable angle rotation can be applied on all pictures in more advanced image editing software. However, you should always keep in mind that straightening a picture may require values of less than 5 degrees deviation and they have to be individually determined through trial and error. Unless severe, most slight tilts in photos are not noticeable. Attempting to edit them requires dedicated time and may only be justifiable for professional activities. Always expect that after a rotation you may need to apply a subsequent crop and discard more of your picture areas that were added by the rotation algorithm to end up with the same format as the initial image. Unless experimenting or for strong reasoned cases, minor angle adjustments are not recommended. | |||
For smartphones it is highly useful to correct a wrong orientation hint by a simple editing in any program, as it avoids the unpleasant aspect of an image that is presented horizontally or vertically instead of the other way around. From time to time, and particularly with less swift movements, you may end up with an image that has the wrong orientation indicated int the file, and as more software takes into account this hinting you may need to correct orientation. | For smartphones it is highly useful to correct a wrong orientation hint by a simple editing in any program, as it avoids the unpleasant aspect of an image that is presented horizontally or vertically instead of the other way around. From time to time, and particularly with less swift movements, you may end up with an image that has the wrong orientation indicated int the file, and as more software takes into account this hinting you may need to correct orientation. | ||
<code>''Always experiment with flipping and rotation, particularly early on, to develop a perspective on what you can easily achieve. | <code>''Always experiment with flipping and rotation, particularly early on, to develop a perspective on what you can easily achieve. 90degree rotation and flipping operations do not affect the image quality in any way, including for JPEGs, as software algorithms evolved to directly apply such operations without saving a re-compressed image afterwards''</code> | ||
==Light, colour, contrast adjustments== | ==Light, colour, contrast adjustments== | ||