Topic: Software & Post Processing

Adjustment Layer

What Is an Adjustment Layer and How Is It Used in Image Editing? This is a layer containing an image adjustment or effect instead of image content. Like a red Cellophane overlay on a print, an adjustment layer will alter the appearance of layers below it, but not actually alter their content, making adjustment layers a cornerstone of reversible, ‘non-destructive’ editing. The adjustment can be altered, hidden or removed at any point. Adjustment layers allow photographers to experiment with edits to their photographs without risking permanently changing the original image content. Adjustment layers can also be copied and applied...

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Color Palette

What is a Color Palette When Talking About Photography and Image Editing? Also referred to as ‘palette’ the term ‘color palette’ describes the entire range of colors that can be rendered by a digital device such as a camera LCD or a computer monitor, or the range of colors contained within a specific image. A computer monitor may have a color palette of 16 million colors, an image on the other hand often contains a much smaller number, often 256. The term is also used to describe a collection of colors, usually displayed graphically in RGB triplets, which a...

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Cropping

What Does Cropping Mean Cropping is the process of trimming the edges of a photo, either digitally with photo processing software, of physically when a print is trimmed with a knife or guillotine.  Ideally, cropping should be used as a tool to improve upon the composition of the original photo, though sometimes it is necessary in order to make an image fit a specific dimension of photographic frame. The crop tool is one of the most important and widely used tools in any image processing software, whether it is in a mobile app, or a full-blown piece of computer...

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Digital Asset Management

What Is Digital Asset Management? The term “Digital Asset Management” is a bit of a mouthful so most people refer to it by the acronym, DAM.  Please see the DAM entry in the photography glossary to get more information on what this is and why it’s important to photographers.   Additional Reading What Is Photo Mechanic? What Is Lightroom? What Does DAM Mean?...

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Lossy

What Does Lossy Mean? Lossy is the opposite of lossless and it means that when a digital image is compressed, some of the image’s data and detail is lost.  JPEGs are a type of lossy compression, and whilst we can control how much a JPEG is compressed by when we save it, there is always a loss.  Sometimes the loss is imperceptible if we use high quality settings, but it’s there!   Additional Reading What Is A JPEG? What Does Lossless Mean?     Example JPEG save screen that allows the choice of how lossy we want the image saving process...

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Non-Volatile Memory

What Is Non-Volatile Memory and How Is It Used in Photography? Non-volatile memory is a type of memory that is not erased when the system within which it is contained is powered down. As such non-volatile memory makes an excellent medium for long-term storage of digital data. Volatile memory such as RAM is the other primary type of memory and is erased when powered down. As a photographer you will encounter types of non-volatile memory all the time; the computer hard drives, SD and Compact Flash memory cards that photographs are stored on are all forms of non-volatile memory,...

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Opacity

What Does Opacity Mean When Talking About Photography? Opacity is the measure of an objects impenetrability to electromagnetic radiation. When talking about photography the term is used to describes exactly how much an object blocks light from passing through it. An object that completely blocks light is called opaque, no light is able to pass through it. The opposite of opaque is transparent. Many opaque objects will reflect light which can be problematic when taking photos. Knowing the opacity of objects is also very important when designing lenses; lens elements despite very low opacity values will still block small...

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Palette

What Does Palette Mean When Talking About Photography and Image Editing? Also referred to as ‘color palette’ the term ‘palette’ describes the entire range of colors that can be rendered by a digital device such as a camera LCD or a computer monitor. A computer monitor may have a color palette of 16 million colors, an image on the other hand often contains a much smaller number, typically 256. The term is also used to describe a collection of colors, usually displayed graphically in RGB triplets, which a user can select when editing images and re-touching photos. A palette,...

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PictBridge

What is PictBridge and How It Is Used in Cameras and Photography? When talking about cameras and photography the term ‘PictBridge’ refers to a photography industry standard which allows digital images to be printed directly from a digital camera without having to first be uploaded to a PC. PictBridge was introduced in 2003 and has been widely adopted by both camera and printer manufacturers; Digital images are printed by connecting a camera to a printer using a USB cable, the image is then selected by the user, which is in turn retrieved by the printer and...

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Pin-Cushioning

What Is Pin-Cushioning and How Does It Effect Photography and Photographs? When talking about photography and taking photographs the term ‘pin-cushioning’ refers to a kind of distortion which makes images appear ‘pinched’ in the middle. The term gets its name from the effect pushing a pin into a pin-cushion has on its appearance. Pin-cushioning is a problem associated mainly with cheap telephoto zoom lenses such as those found on point and shoot cameras. The effects of pin-cushioning can be corrected in post-processing or by using higher quality equipment. The opposite of pin-cushioning is ‘barrel distortion’ which causes an image...

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