When you change the size of a digital file your software either adds pixels when increasing the size or removes them when making the image smaller. This scaling process is known as Interpolation and relies on Photoshop (Photoshop Elements) knowing which pixels to add or dump. There are now five methods of interpolation in Photoshop/Photoshop Elements – Nearest Neighbor, Bilinear and Bicubic, with Bicubic Smoother and Bicubic Sharper which were first added in Photoshop CS and Photoshop Elements 4.0. Photoshop users can alter the default method used when changing image sizes by going to Edit > Preferences > General. Photoshop Elements users can only alter this option when scaling using the options in the Image > Size dialogue
The image content in Bridge can be viewed in a variety of ways including as a Slide Show or in Compact mode, to save screen space. Other than these specialist options the content can also be displayed as Thumbnails (the default mode), like a filmstrip, with details attached or together with any versions or alternates that are available.
One of the problems with applying dodge and burn tools directly to the photo is that these actions change the original pixels irreversibly. For this reason some photographers only ever make dodging and burning changes on copies of the their photos, not the originals, but there is another way to achieve the same ends non-destructively and without the need for creating multiple copies.
The RAW file is now a professional photographer’s preferred image format. Unfortunately different camera brands use different RAW formats and therefore most software applications can’t read all of these different formats. Even though the RAW format is an uncompressed and high quality format, sharing the files across a variety of workflows may prove difficult. Adobe has now created a publicly available archival format, known as the Digital Negative (DNG). The new DNG format is regaled as being “future proof” and most of the big software manufacturers are supporting the format.
Wouldn’t it be nice to be able to see how a photo would look printed on specific paper with a particular printer before you go to the time and expense of producing the hard copy? Well Photoshop provides a unique way to do just this using its Soft Proofing command.
You can choose to attach a different ICC profile to an image by selecting the Edit > Assign Profile option in Photoshop. This feature lets you assign the chosen colour space to the picture without changing the value of the image’s colours to the profile.
In contrast, the Convert to Profile option available from the same menu changes the colour values of the original image to match the newly selected colour space.