2012年10月26日星期五

PHOTOSHOP HOW MAKE AN ACTION TO BATCH CHANGE THE COLOR PROFILE(ICC)

PHOTOSHOP HOW MAKE AN ACTION TO BATCH CHANGE THE COLOR PROFILE(ICC)

photoshop how make an action to batch change the color profile(ICC)
RGB by itself, with no modifiers, is not a designation for a color profile. It is simply a generic description of the file type (like CYMK or grayscale). sRGB is a designation for a specific RGB profile.
If you open one of these images in PSCS3 (and if you have selected the appropriate warnings in the Color Management dialog) the program will inform you if the image is tagged with a profile other than your working color space, or if the image is not tagged at all. If the former, then just convert to sRGB. If the latter, assign sRGB profile.
Batch processing is very useful when a large number of files require the same processing. For example, using a camera to digitize a diary can easily generate hundreds of images that need to be rotated and renamed. Batch processing allows the changes to be applied to a group of files.
The main steps that may need to be done with batch processing for historical images are listed below in the order they would typically be applied.
· Crop the image
· Rotate the image
· Adjust tone and color
· Set the resolution to determine the size of the output image
· Assign or convert color space for the image
· Set the format of the output file
· Rename the file
Batch processing begins by identifying the changes that need to be made for a group of images. Typically, the changes are made to one of the files and the steps or settings recorded. Then these changes are specified for batch processing and applied to the other files. Output file names typically have characters identifying the group of files and then a number that is incremented for each file in sequence (e.g., dmb_diary_1926_001, dmb_diary_1926_002).
The safest strategy for batch processing is to put the output files in a separate folder from the input files. The input files should not be deleted until the batch processing has been verified to have completed successfully. While batch processing can greatly speed processing, it can also cause extensive damage if there are problems. With separate input and output folders batch processing can easily and reliably be redone if there are problems.
As would be expected, Photoshop CS has powerful batch processing capabilities. Photoshop Elements has limited batch processing capabilities that primarily can convert the format and apply auto adjustments to a group of files, but does not have a way to rotate the images or make custom adjustments. The free XnView image viewing application has useful batch processing capabilities but is limited to processing with only 8 bits per channel. XnView used alone or along with Photoshop Elements is usually adequate for processing simple documents such as diaries.
It is highly recommended that each image is checked to make sure the result of the batch processing was as expected. These checks can be done quickly with image viewing software such as XnView or the Windows Photo Viewer.
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2012年10月24日星期三

PHOTOSHOP HOW MAKE AN ACTION TO BATCH CHANGE THE COLOR PROFILE(ICC)

PHOTOSHOP HOW MAKE AN ACTION TO BATCH CHANGE THE COLOR PROFILE(ICC)

photoshop how make an action to batch change the color profile(ICC)
RGB by itself, with no modifiers, is not a designation for a color profile. It is simply a generic description of the file type (like CYMK or grayscale). sRGB is a designation for a specific RGB profile.
If you open one of these images in PSCS3 (and if you have selected the appropriate warnings in the Color Management dialog) the program will inform you if the image is tagged with a profile other than your working color space, or if the image is not tagged at all. If the former, then just convert to sRGB. If the latter, assign sRGB profile.
Batch processing is very useful when a large number of files require the same processing. For example, using a camera to digitize a diary can easily generate hundreds of images that need to be rotated and renamed. Batch processing allows the changes to be applied to a group of files.
The main steps that may need to be done with batch processing for historical images are listed below in the order they would typically be applied.
· Crop the image
· Rotate the image
· Adjust tone and color
· Set the resolution to determine the size of the output image
· Assign or convert color space for the image
· Set the format of the output file
· Rename the file
Batch processing begins by identifying the changes that need to be made for a group of images. Typically, the changes are made to one of the files and the steps or settings recorded. Then these changes are specified for batch processing and applied to the other files. Output file names typically have characters identifying the group of files and then a number that is incremented for each file in sequence (e.g., dmb_diary_1926_001, dmb_diary_1926_002).
The safest strategy for batch processing is to put the output files in a separate folder from the input files. The input files should not be deleted until the batch processing has been verified to have completed successfully. While batch processing can greatly speed processing, it can also cause extensive damage if there are problems. With separate input and output folders batch processing can easily and reliably be redone if there are problems.
As would be expected, Photoshop CS has powerful batch processing capabilities. Photoshop Elements has limited batch processing capabilities that primarily can convert the format and apply auto adjustments to a group of files, but does not have a way to rotate the images or make custom adjustments. The free XnView image viewing application has useful batch processing capabilities but is limited to processing with only 8 bits per channel. XnView used alone or along with Photoshop Elements is usually adequate for processing simple documents such as diaries.
It is highly recommended that each image is checked to make sure the result of the batch processing was as expected. These checks can be done quickly with image viewing software such as XnView or the Windows Photo Viewer.
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2012年10月22日星期一

ADJUSTING IMAGE COLOR AND TONE IN PHOTOSHOP

ADJUSTING IMAGE COLOR AND TONE IN PHOTOSHOP

Photoshop lets you correct color in a number of ways - so many ways that it can be confusing as to which approach to take. Should you use Color Balance, Variations, or Curves? Unless you understand the Photoshop philosophy, along with some basic color theory, it can be confusing and downright frustrating as to why there are so many color options.
I'm going to start with the philosophy and then look at all of the various color controls that Photoshop has to offer. By the time we're through you should have a good sense of the color correction options available for your digital images.
Adobe has created Photoshop with the basic idea that choice and variation in software design is a good thing. They don't give just one way to correct color; they deliver ten different correction options. Why have ten options when you only need one? The idea is twofold. First of all, there are many different kinds of Photoshop users. Some are very technical, with a complex understanding of color theory, while others are casual users who only own Photoshop because it was bundled with their $200 scanner. The strength and effectiveness of any program is in the way that it caters to the full spectrum of users, from remedial to expert. Photoshop shines in this regard, delivering as much or as little control as necessary to meet the needs of the user.
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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