2012年10月24日星期三

PHOTOSHOP SCRIPT TO BATCH IMPORT IMAGES INTO PSD LAYER

PHOTOSHOP SCRIPT TO BATCH IMPORT IMAGES INTO PSD LAYER

photoshop script to batch import images into PSD layer
Adobe Photoshop is one of the world's best known software applications and widely used in professional graphics, both in print and for web work. While there are some great open source graphics applications like GIMP or Krita, sometimes Photoshop is still the only application which can be used in certain cases - especially in the pre-press world.
One of the sources of its power is the native PSD file format. A PSD file can not only hold image data, but is more of a large container which can include metadata, camera info, text, vector artwork and more. Most other programs only handle a small subset of its capabilities.
PSD Import
Scribus does have its own native capabilities to import PSD files from version 6 and earlier - the latest version of the PSD format which is publicly documented. The Scribus Team has also been able to worm some features out of files created with later PS versions, so most PSD files can at least be loaded into Scribus, but they may have file format features which are not supported.
In general, PSD support is quite extensive, including:
The ability to manipulate and adjust layer settings.
The option to enable and use masking along with the paths embedded in the file.
In almost all cases, provided they are not defective, ICC color profiles which are embedded into a PSD are detected and used when color management is enabled.
Scribus generally will import 8-bit Greyscale, RGB and CMYK PSD files without issue.
Alpha transparency is supported.
Scribus will import PSD files with normal layers and will display the individual layers in the Extended Image Properties dialog, which is avialable from the Context Menu.
Clipping paths in PSD files will be recognized and can be used for text flow.
Blending modes which are in the image file can be used to affect the way the image displays and prints. It's also possible to modify blending or to apply other modes between PSD layers. This won't affect the original file.
In almost all cases Scribus will automatically detect the file encoding, whether it is ASCII, Binary or Binary with JPEG.
Potential Issues
Adjustment layers and effect layers are not yet supported. In such a case, Scribus will fall back to using a "flattened" version of the file.
Layered TIFFs saved from Photoshop are often not handled well by other TIFF readers and importing applications. This is because Photoshop actually embeds PSD type layers in a private tag. Scribus will attempt to read the PSD layers info and, if successful, make it accessible to the Extended Image Properties dialog. Text and vector layers within this private tag are not yet supported.
Specialties
DCS (Desktop Color Separations) 1.x/2.0 files are a special flavor of EPS saved in Photoshop and are imported natively - much like a PSD file - and complete with ICC profile support. Image quality should be close to or equivalent to the native PSD file. Vector masks are also detected and can be used to control the display within Extended Image Properties. DCS files can also be saved from Quark XPress®, but this flavor will be imported using Ghostscript as a filter for the time being. This is partly because the way Quark X-Press® exports them does not conform to the DCS specifications properly.
Scribus can detect Duotones, Tritones and Quadtones in PSD and Photoshop EPS files and import them. The difference between both formats is that you need to import the spot colors from the EPS separately via Edit > Colors > Import. If you import a PSD file, you can directly manipulate each of the spot colors within it via the Image Effects dialog, which is available from the Context Menu. In most cases, Scribus will detect the image as Duo, Tri or Quadtone and automatically import the colors from the PSD file.
Microsoft Expression Web enables you to generate a .png (PNG-24), .gif, or .jpg file from an Adobe Photoshop .psd file and select the Photoshop layers you want to include or exclude from the image. If you want to make changes to the original .psd file, in Expression Web, you can select the web-optimized image that Expression Web generated for you and conveniently open the original .psd file in your default .psd file editor, such as Adobe Photoshop.
Expression Web can import Photoshop .psd files that have all the following properties:
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2012年10月22日星期一

USE THE LAYER MASKS AND ADJUSTMENT LAYERS TO ADJUST THE SKIN TONE IN AN IMAGE WITH PHOTOSHOP

USE THE LAYER MASKS AND ADJUSTMENT LAYERS TO ADJUST THE SKIN TONE IN AN IMAGE WITH PHOTOSHOP

use the layer masks and adjustment layers to adjust the skin tone in an image with Photoshop
(Image>Adjust>Auto Levels)
This approach automatically optimizes the image in a basic way, setting a white point and black point and distributing the mid values throughout the range. There is no dialog box here, just select the menu command and see what it does. If youre a beginner, this command can be a good place to start correcting the image. For decent photos it can make them better with a mouse click. Be prepared to hit Undo, however, as this ones misses the mark as often as it hits it.
The second reason for so many controls is that the science of color involves a number of variables, which can be manipulated globally or within smaller subsets. Sometimes you just want to change one of these components with a more specialized tool rather than using a general-purpose tool for global corrections. For example, changing a slight color cast involves a different approach than tweaking the hue or saturation. In addition, making a global change in overall contrast would be very difficult if you had to change hue, saturation, or brightness independently. In short, each tool has its place, depending on the task at hand.
Most of the color controls in Photoshop are located in the Image menu, under the adjust submenu. I'll briefly describe them in the pages that follow.(Image>Adjust>Levels)
The Levels Control is another way to modify the color in an image. Like curves, Levels also lets you change the color across the tonal range, modifying a composite image or individual color channels. The dialog features a histogram method of displaying image data that is unique and sometimes useful. It shows the full range of tonal values, from light to dark, on a linear scale. A graph rises and falls across that scale, indicating the actual number of pixels in the image that have the corresponding value. Therefore, as a general rule you would want a nice rounded curve that is highest in the mid-tones, with good representation in the highlight and shadow ends of the spectrum.
The Levels control uses highlight, midpoint, and shadow slides, which shift the image values in the histogram, lightening or darkening the image. I find this three variable approach limiting compared to the unlimited number of points I can place and manipulate on a curve. On the other hand, until I became comfortable with color numbers, Levels was my main color control. It also allows you to set white and black points, and delivers decent results for basic to intermediate changes.
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