The definition of a digital image encompasses all genres originating, manipulated, or stored in electronic format – characterized by a strictly visual state, without physical or tangible form. However, in the context of graphic arts, it is common to opt for a pertinent differentiation between digital image and graphic image, considering the direct and significant influence that this difference implies in distinct printing techniques. Following this, the term “digital” ends up being more associated with photographic images or those structured in pixels, while the term “graphic” is linked to flat or vector images. Both types are still electronic formats, but with completely different structures, as developed throughout this chapter.
Image Resolution – Digital and Mechanical
Meanwhile, a large part of digital images are intended for printing on substrates – the transition from the intangible to the tangible mode, or from the digital to the mechanical. And just as with screen printing, this process also has a geometry. Whether in print or digital terms, this geometry is summarily referred to as resolution. Resolution translates the level of detail in an image, defining its degree of sharpness, in an inverse proportional relationship – because the greater the detail, the lower the overall sharpness. To measure image resolution, indicators are used that have ended up succumbing to the simplification characteristic of modern times, which, for that reason, is not always beneficial to understanding processes.
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