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Difference between revisions of "Post Processing and Effects"
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Post Processing and Effects (view source)
Revision as of 14:14, 31 August 2023
, 14:14, 31 August 2023→Adding transparency
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==Chroma Keying== | |||
No post processing and effects section is ever complete without chroma-keying. Although the end results are similar to adding transparency, chroma keying offers not only automated or simplified manual content creation but, most importantly, caters to video and movie or film production. In its most basic form, chroma keying helps by using a background colour that is rarely present in your subject, such as an extremely bright green, and simplifying the process of creating an artificial transparency around the subject, by extracting only that colour tone and leaving everything else intact. | No post processing and effects section is ever complete without chroma-keying. Although the end results are similar to adding transparency, chroma keying offers not only automated or simplified manual content creation but, most importantly, caters to video and movie or film production. In its most basic form, chroma keying helps by using a background colour that is rarely present in your subject, such as an extremely bright green, and simplifying the process of creating an artificial transparency around the subject, by extracting only that colour tone and leaving everything else intact. | ||
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=== Advanced effects | ==Layered compositions == | ||
It is difficult to have all your subjects in an ideal composition. For situations that require less realistic effects, compositing, or creating an image which includes different subjects that were never parts of the same scene is popular for many activities, particularly in advertising. To achieve such effects, you obviously need photographs that have similar intensities and colour appearance. The whole composition, is however, a result of imagination of the editor. | |||
A layer may be comprised of a single subject, a multitude of them, the background, a set of graphical elements such as lines or other geometrical objects. There is no limit to what a layer may contain. As you will notice, objects with good transparency can be placed closer or farther from the viewer to achieve the desired effect. Layers are flexible also in the way in which their apparent dimensions are handled, improving abilities to distort the composition as required. | |||
To achieve good results you have to result to using advanced image editors, free or commercial products, that allow layering. If you use GIMP, Krita or Adobe Photoshop, or any other popular image editing program, you are already having the prerequisites met. To develop successful compositions, you have to get accustomed to using layers. Think of layers as nothing more than images that can be placed in a back to front order, as required. Their size, transparency, placement, colour, dictates what options are available. Even if the final image exported as a JPEG or PNG or any other format may or may not have transparency itself, the end result is a single layer image. All editing and creative options are left in your image editor. It is advisable to experiment with work on layers to have adequate flexibility in handling any task and unleashing your creativity. | |||
<code>''Most images that are eye-catching in advertising or visual communications use a result of compositing, or using multiple layers, placed in a carefully considered order and edited carefully, to create a a desired effect. It is highly useful to experiment with layering in image editors that support this feature.''</code> | |||
==Advanced effects == | |||
Complex effects may be applied to images and there is no limit to what an application can offer by itself or through the use of plugins. When applying such effects the best approach is to keep the original image and any intermediate one with various degrees or emphasis applied. For instance, when you colorize a picture or when you blur certain parts of it, I advise to save the same image with effects applied at various intensities. After you have these images, review which one looks best to you and also ask for opinions. Do not rush, as some results may seem more appropriate on the rush of the moment but they may not seem as such after you let a day pass. | Complex effects may be applied to images and there is no limit to what an application can offer by itself or through the use of plugins. When applying such effects the best approach is to keep the original image and any intermediate one with various degrees or emphasis applied. For instance, when you colorize a picture or when you blur certain parts of it, I advise to save the same image with effects applied at various intensities. After you have these images, review which one looks best to you and also ask for opinions. Do not rush, as some results may seem more appropriate on the rush of the moment but they may not seem as such after you let a day pass. | ||