# @(#)ECLIPSECORRECT	2.1 10/7/93
#
# Copyright (c) 1993 Alias Research Inc. All rights reserved.
# This is unpublished proprietary source code of Alias Research 
# Inc.
# The copyright notice does not evidence any actual or intended
# publication of such source code.  Alias Research Inc. cannot 
# be held responsible for any inaccuracies contained herein.
#
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Correct Menu

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You use the Correct menu commands to make corrections to your images. You can apply corrections to images globally, locally through masks, or directly with a brush. The Correct menu commands display correction windows that can remain open while you work. Only one Correct window can be open at one time.


If you decide not to make a correction, you can Reset the values displayed in the correction window and then close the window. To close a window, select the control menu in the upper left corner of the window, then click Close.


You can save the settings for individual corrections. This lets you apply the same corrections consistently to the same image or different images. Use the Open and Save command buttons in the Correction windows.


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Contrast:

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Use the Contrast command to adjust the contrast of individual layers. A positive value increases the contrast of a layer; a negative value decreases, or flattens, the contrast. For example, an increase of 12 is actually an addition of 12% dot in the shadow areas and a reduction of 12% dot in the highlight areas.


1. Select Contrast from the Correct menu.


Alias Eclipse displays the Contrast window.


2. Select the push button for the color layer you want to work with.


3. Use any of the following methods to adjust the contrast:


a. Click and drag one of the points on the graph line. You can use either point; the graph line distorts symmetrically no matter which point you drag.


b. Select a point, and click on the Increase or Decrease arrows.


c. Select a point, type a positive or negative value in the text box , and press Enter. The graph point and line move to reflect the new value.


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Etch:

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Use Etch to adjust the cast of individual layers. A positive Etch value adds that percentage overall to your image. A negative Etch value results in a decrease or cast removal. An Etch decrease of -5 subtracts 5% dot equally within a layer.


1. Select Etch from the Correct menu.


Alias Eclipse displays the Etch window.


2. Select the push button for the color layer you want to work with.


3. Use any of the following methods to adjust the cast:


a. Click and drag the point on the graph line. There is only one point on the graph line in this tool window. When you move the point, the entire graph line moves up or down.


b. Click on the Increase or Decrease arrows.


c. Type a positive or negative value in the text box, and press Enter. The graph line moves to reflect the new value.


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Freeform: 

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Use Freeform to make free-form corrections within any layer. The Freeform tool window displays a graph line that has 9 control points that are not bound to the graph axis. You can move these points in any direction within each layer.


The tool window also contains two text boxes labeled In and Out. The In box shows the existing value of a selected point on the graph line. The Out box shows the point's value after you move it.


1. Select Freeform from the Correct menu.


Alias Eclipse displays the Freeform window. By default, Alias Eclipse highlights the first point at the 0,0 position.


2. Select the push button for the color layer you want to work with.


3. Use either method to make the correction:


a. Click and drag one of the points. As you drag the point, the value in the Out text box changes.


b. Select a point on the graph line, and type a value in the Out text box. The point moves to reflect the new value.


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Gradation:

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Use Gradation to change the quarter tones equally in all selected layers. You can work with any combination of layers. The Gradation window displays the actual dot percent of the quarter tones.


1. Select Gradation from the Correct menu.


Alias Eclipse displays the Gradation window. The points on the graph line represent the quarter tones. Below the graph, the window contains a row of text boxes that display the quarter tone values for the layers.


2. Select the push buttons for the color layers you want to work with. You can select as many layers as you want at one time.


3. Use any of the following methods to modify the quarter tones:


a. Click and drag one of the quarter tone points. As you drag the point, the value in the text box below the point changes.


b. Select a quarter tone point, then click on the Increase or Decrease arrows.


c. Type a value in the text box beneath a quarter tone point, and press Enter. The point moves to reflect the new value.


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Hue:

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Use the Hue command to adjust the hue of the colors. You can work with up to eight colors at a time, and you can select the colors from your image.


1. Select Hue from the Correct menu.


Alias Eclipse displays the Hue window. The window contains eight small color swatches and eight columns of text boxes.


You use a swatch to select a color you want to adjust, and then use the text boxes below it to add or subtract percentages of red, green, or blue (or cyan, yellow, magenta, or black) in the hue used to make the color. Use the Range text box at the bottom of each column to limit the change to a specific range of the hue.


2. Select one of the color swatches at the top of the window.


Alias Eclipse displays the Color window. You use the color window to select the color you want to adjust. 


3. To choose a color from your image, click on the Pick button in the Color window.


Alias Eclipse prompts you to pick a color from the image. 


4. Use MB1 to drag the cursor over the image. 


The color swatches in both windows show the color values at the cursor position.


5. Release MB1 to select a color at the cursor position. The small swatch in the Hue window shows the selected color. 


6. To choose a color from the Color window, drag the sliders left or right, type values in the text boxes, or use MB1 to drag the cursor around in the color ramp in the window.  You can also select the Pick button in the color window and then pick a color from your image. See the Color command in the Window Menu section for more information on using the Alias Eclipse color windows.


The swatch in the Hue window shows the color you select.


Repeat steps 2 through 6 for each color swatch you select in the Hue window. You can choose up to eight colors. You can leave the Color window open while you work with the Hue window. 


7. In the text boxes below each color swatch, type positive or negative values for the percentage of R G B (or C M Y K) you want to add to or subtract from the hue used to make the color shown in the swatch. 


8. To limit the change in the hue, type a positive value in the Range text box at the bottom of the column. This value establishes the hue range to which Alias Eclipse applies the change. 


For example, suppose the color in the swatch has a hue value of 300. If you type a Range of 10, Alias Eclipse adds or subtracts color in the range of 295 to 305. If you type 20, the range is from 290 to 310. 
In either case, Alias Eclipse makes a 100% change at the 300 point, and then propagates the change in a steadily decreasing percentage toward either end of the range.


9. Repeat steps 7 and 8 for each color swatch. 


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Midpoint:

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Use Midpoint to adjust the midpoint of individual layers. This operation is similar to a gamma curve, as it mainly affects the midrange of a layer with decreasing effect to the start and end points. A positive change increases the midpoint (50% dot); a negative change decreases the midpoint. 


1. Select Midpoint from the Correct menu.


Alias Eclipse displays the Midpoint window.


2. Select the push button for the color layer you want to work with.


3. Use any of the following methods to adjust the midpoint:


a. Click and drag the point on the graph line. There is only one point on the graph line in this tool window.


b. Select a point, and click on the Increase or Decrease arrows.


c. Type a positive or negative value in the text box in the lower right corner of the window, then press Enter. The point moves to reflect the new value.


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Modify:

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Use Modify to increase or decrease the dot in the quarter and eighth tones in each layer. The Modify window displays the actual dot percent of the quarter tones in each layer.


1. Select Modify from the Correct menu.


Alias Eclipse displays the Modify window. The points on the graph line represent the quarter tones. The eighth tones are represented by small x's between the quarter tone points. Below the graph, the window contains three or four rows of text boxes that display the quarter tone values for each layer.


2. Select the push button for the color layer you want to work with.


3. Use any of the following methods to modify the quarter tones:


a. Click and drag one of the quarter tone points. As you drag the point, the value in the text box below the point changes.


b. Select a quarter tone point, then click on the Increase or Decrease arrows.


c. Type a value in the text box beneath a quarter tone point, then press Enter. The point moves to reflect the new value.


4. Use any of the following methods to modify the eighth tones:


a. Click and drag one of the eighth tone points.


b. Select a eighth tone point, then click on the Increase or Decrease arrows.


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Selective:

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Use the Selective command to correct specific colors in an image. You select the color you want to change, and then select or mix the color to change it to. You can change as many colors as you want.


1. Select Selective from the Correct menu.


Alias Eclipse displays the Selective window. The window contains From and To color swatches, sliders and text boxes, a Smooth slider and text box, and four command buttons.


2. Click MB1 in the From color swatch to select the hue you want to change.


Alias Eclipse displays the Hue Color window. 


3. Click MB1 in the color window to select the color you want to change, or use the sliders or text boxes to mix or select a color. You can also select the Pick button in the color window and then pick a color from your image.


4. Repeat steps 2 and 3 to select the To color.


5. To extend the range of the change, type a value in the Range text box. For example, if you type 10 in this box, Alias Eclipses changes the From color and the ten hues on either side of it to the To color. If you leave this text box blank, Alias Eclipse changes only the specific color in the From swatch.


6. To smooth the change at either end of the range of hues, type a value in the Smooth text box, or use the sliders to adjust this value.


7. To rest the color values, or start over, select the Reset button


8. To apply the correction, select the Apply button.


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SetPoint:

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Use SetPoint command to adjust the "catch lights" and "deep shadows" of an image without affecting other areas of the image. You isolate the catch lights by selecting Start from the Start/End Option; you isolate the deep shadows by selecting End.


You then use the graph to set a SetPoint value. The SetPoint defines a point beyond which no adjustment occurs. After you establish the SetPoint, use the graph to make the adjustments.


1. Select SetPoint from the Correct menu.


Alias Eclipse displays the SetPoint window.


2. Select the push button for the color layer you want to work with.


3. Select the Start/End Option button and select either Start (for catch lights) or End (deep shadows).


Alias Eclipse displays two points at either the start or the end of the graph line . One point represents the SetPoint and moves only along the graph line; you can't move it above or below the line. The second point is the Move point, the one you use to make your adjustments. Alias Eclipse highlights the move point.


4. Use either of the following methods to select a SetPoint:


a. Click and drag the SetPoint along the graph line. Notice that the value in the Set Point text box changes as you move the point.


b. Type a value in the SetPoint text box and press Enter. The SetPoint moves to reflect the new value.


For example, if you select a SetPoint of 10%, any adjustment you make affects only catch lights or deep shadow of 10% or less.


5. Use any of the following methods to adjust the catch lights or deep shadows:


a. Click and drag the move point. Notice that you can't move the point beyond the SetPoint, although you can drag it above or below the line.


b. Select the move point, and click on the Increase or Decrease arrows. These arrows work only with the move point.


c. Type a positive or negative value in the Move text box, and press Enter. The point moves to reflect the new value.


The SetPoint limits the adjustment you can make to a specific range. If you selected a SetPoint of 10%, an adjustment increases or decreases the dot amount between 0% and 10%.


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Slope:

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Use the Slope tool to adjust the slope of an individual layer. A slope correction is an increase or decrease in the start or end point of the layer. The Slope tool window displays one point at either end of the graph line. The point at the lower left (0,0) is the start point, and the point at the upper right (100,100) is the end point. To work on your lights, use the start point. To work on your darks, use the end point.


Slope is a multiplicative process. It makes the most significant change at the point of selection and propagates the change by a decreasing factor to the opposite end, where no change occurs. A slope increase of 25 to the End point implies a 125% maximum dot in the selected layer. Alias Eclipse maps all increases resulting in values greater than 100 to 100%. It maps all decreases resulting in values less than 0 to 0%.


1. Select Slope from the Correct menu.


Alias Eclipse displays the Slope window.


2. Select the push button for the color layer you want to work with.


Alias Eclipse displays one point at each end of the graph line. The point at 0,0 is the start point; the point at 100,100 is the end point.


3. Use any of the following methods to adjust the slope:


a. Click and drag the start or end point on the graph line. Notice that the points remain anchored to the outer boundary of the graph.


b. Select either point, and click on the Increase or Decrease arrows.


c. Type a positive or negative value in the Start or End text boxes in the lower right corner of the window, then press Enter. The corresponding point moves to reflect the new value.


4. You can adjust both the start and end points if you want.


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Transfer:

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You use the Transfer tool to increase, decrease, or correct color in a layer or to transfer color between layers. The Transfer window has a table of text boxes, which looks like a small spreadsheet, that displays the current color layer values. You use the table boxes to increase, decrease, or transfer color.


Depending on whether you're working with a CMYK or RGB image, the table has either three or four rows and columns . The columns represent the current color layer values. The rows represent new color layer values. When you transfer colors, the columns represent the source layers, and the rows represent the destination layers.


1. Select Transfer from the Correct menu.


Alias Eclipse displays the Transfer window.


2. To increase or decrease a color in a layer:


a. Find the column for the layer you want to change. For example, the G(reen) column.


b. Look down the G(reen) column for the row labeled New G(reen).


c. In the box where the G column and the New G row meet, type a value greater than or less than 100. For example, to increase the green by 20%, type 120. To decrease it by 20%, type 80.


3. To transfer color between layers, type positive values:


a. Find the column for the color that you want to transfer to another layer (the source layer). For example, to transfer green to the blue layer, start at the G(reen) column.


b. Look down the G(reen) column for the row labeled New B(lue). The row represents the destination layer..


c. In the box where the G column and the New B row meet, type a positive percentage value for the amount of source color you want to transfer to the destination layer. For example, to transfer 20% of the green to the blue layer, type 20.


4. To selectively increase or decrease one color in relation to other layers, type positive or negative values. For example, to increase the red only in areas that have a high concentration of blue:


a. Find the row for the color that you want to increase or decrease. For this example, start at the New R(ed) row.


b. Look across the New R(ed) row and find the column for the layer in which you want to increase or decrease the red. For this example, find the B(lue) column. 


c. In the box where the New R(ed) row and the B(lue) column meet, type a negative percentage value. For example, to increase the red by 20% in areas with a high concentration of blue, type 20. To decrease the red by 20%, type -20.
