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LANG=CID="47915"ImageVisionÔ Tools User's GuideDocument Number 007-2273-001ContributorsEdited by Kathy Chaix.Technical assistance provided by Dan Baca.©Copyright 1994, Silicon Graphics, Inc.name='mdash' font=symbol charset=fontspecific code=190 
			descr='[mdash]' All Rights ReservedThis document contains proprietary and confidential information of Silicon Graphics, Inc. The contents of this document may not be disclosed to third parties, copied, or duplicated in any form, in whole or in part, without the prior written permission of Silicon Graphics, Inc.Restricted Rights LegendUse, duplication, or disclosure of the technical data contained in this document by the Government is subject to restrictions as set forth in subdivision (c) (1) (ii) of the Rights in Technical Data and Computer Software clause at DFARS 52.227-7013 and/or in similar or successor clauses in the FAR, or in the DOD or NASA FAR Supplement. Unpublished rights reserved under the Copyright Laws of the United States. Contractor/manufacturer is Silicon Graphics, Inc., 2011 N. Shoreline Blvd., Mountain View, CA 94039-7311.ImageVisionÔ Tools User's GuideDocument Number 007-2273-001Silicon Graphics, Inc.Mountain View, CaliforniaSilicon Graphics and IRIS are registered trademarks and IRIS Showcase, IRIX ImageVision, and ImageVision Library * are trademarks of Silicon Graphics, Inc. PostScript is a registered trademark of Adobe Systems, Inc. UNIX is a registered trademark of UNIX System Laboratories. *Application pending for federal registration.LBL="1"ID="26680"IntroductionThe ImageVisionÔ tools are a suite of applications that let you enhance images and then arrange them to print or use in other Silicon Graphics, Inc. applications.Here are some of the ways you can use the ImageVision tools with other Silicon Graphics, Inc. applications:Use the Capture tool to take a picture of an image and then use the Image Works and Image View tools to enhance the image and arrange it with other images.Use an image you've customized using the ImageVision tools in the Movie Maker application to make your own movies.Add a voice-over to an image using the Sound Editor application.Print your image to use in hard-copy presentations.This book contains the following chapters:IDREF="70557" TYPE="TITLE"Chaptername='nbsp' font=fixed charset=iso-8859-1 code=1602, "Image Works," describes how to manipulate images name='mdash' font=symbol charset=fontspecific code=190 
			descr='[mdash]' blur, sharpen, stretch, scale, and flip images name='mdash' font=symbol charset=fontspecific code=190 
			descr='[mdash]' and save them to a file. IDREF="26680" TYPE="TITLE"Chaptername='nbsp' font=fixed charset=iso-8859-1 code=1603, "Image Copy and Image Info," describes the command line utilities that let you copy or get information about an image.IDREF="26680" TYPE="TITLE"Chaptername='nbsp' font=fixed charset=iso-8859-1 code=1604, "ImgView," describes how to rearrange images to make your own image composites.The ImageVision tools icons are located on the MediaTools page of the Icon Catalog. Choose "Icon Catalog" from the Find toolchest then choose "MediaTools".LBL="" HELPID=""ConventionsThis guide uses the following conventions:References to other documents are in italics.References to other chapters and sections within this guide are in quotation marks.Names of buttons are in italics.Names of menu choices are in quotation marks.Step-by-step instructions used to perform a task are shown as numbered sentences. These may be followed by additional instructions, marked with a small box, that further explain the step. LBL="2"ID="70557"Image WorksThis chapter contains these sections:IDREF="38885" TYPE="TITLE""About Image Works"IDREF="76241" TYPE="TITLE""Saving an Image in Image Works"IDREF="74527" TYPE="TITLE""Manipulating Images Using Image Works"To open Image Works, double-click the imgworks icon on the MediaTools page of the Icon Catalog.LBL="" HELPID="imgworks.about"ID="38885"About Image WorksImage Works lets you manipulate images name='mdash' font=symbol charset=fontspecific code=190 
			descr='[mdash]' blur, sharpen, stretch, scale, and flip images name='mdash' font=symbol charset=fontspecific code=190 
			descr='[mdash]' and save them to a file. Image Works also lets you convert color images to black and white or make photographic negatives. This documentation contains these sections:IDREF="38885" TYPE="TITLE""About ImageWorks"IDREF="76241" TYPE="TITLE""Saving an Image in Image Works"IDREF="74527" TYPE="TITLE""Manipulating Images Using Image Works"The Image Works window appears in IDREF="66320" TYPE="GRAPHIC"Figurename='nbsp' font=fixed charset=iso-8859-1 code=1602-1
.FILE="ch2-1.bw" POSITION="INLINE" SCALE="FALSE"LBL="2-1"Figure 2-1 
ID="66320"The Image Works window.The Image Works window contains six menus and a help menu:FileLets you open, save, and print images. You can also set sampling preferences using the "Preference" menu.EditContains the undo and redo commands.ViewContains commands that let you increase and decrease the size of the image.TransformContains commands that crop, scale, stretch, flip, or rotate an image.EnhanceContains commands that let you use effects such as blur and sharpen, change the contrast and brightness, and change the color balance.EffectsAllows you to turn an image into black and white, apply special effects like posterize and edges, and turn an image into a photographic negative.The balance of the Image Works window is the image area. When you open an image, this is where it appears.LBL="" HELPID="imgworks.save"ID="76241"Saving an ImageUse the "Save" command in the File menu to save your current work as is. Use "Save As..." to copy your image to a new file using a new name. The "Save As" command lets you save your image in TIFF, FIT, or SGI Image formats. The ImageVision tools can read files stored in TIFF, FIT, SGI, GIF, and PhotoCD formats.The TIFF format is the most common and useful file format. The SGI format is used by applications on Silicon Graphics systems, including IRIS Showcase. The FIT format is not a standard, but is supported by the ImageVision Library (IL). The format you choose appears as the name of the File Format button in the "Save As..." dialog box.If you are saving an image in TIFF format, you can choose to turn compression on or off. Turning compression on significantly reduces the amount of disk space needed to store the image without reducing the quality of the image.LBL="" HELPID="imgworks.preferences"Setting PreferencesChoose "Set Preferences..." from the File menu to choose the resampling method for your images.Resampling determines the procedure Images Works uses to stretch the image. "Nearest Neighbor" works quickly, but produces lower quality results. "Bilinear" and "Bicubic" use more complex, time-consuming methods, but produce higher quality results.LBL="" HELPID="imgworks.edit"ID="74527"Manipulating ImagesThese sections tell you how to use Image Works to do many different things:IDREF="68288" TYPE="TITLE""Blurring an Image"IDREF="63683" TYPE="TITLE""Sharpening an Image"IDREF="30061" TYPE="TITLE""Converting an Image to Black and White"IDREF="83140" TYPE="TITLE""Converting an Image to a Photographic Negative"IDREF="36514" TYPE="TITLE""Cropping an Image"IDREF="25523" TYPE="TITLE""Resizing an Image"IDREF="89706" TYPE="TITLE""Stretching an Image"IDREF="67918" TYPE="TITLE""Flipping an Image"IDREF="13375" TYPE="TITLE""Rotating an Image"IDREF="82461" TYPE="TITLE""Lightening and Darkening Pixels in an Image"IDREF="13575" TYPE="TITLE""Brightening or Darkening an Image"IDREF="64056" TYPE="TITLE""Adjusting the Amount of Contrast in an Image"IDREF="87209" TYPE="TITLE""Reducing the Number of Colors in an Image"IDREF="37053" TYPE="TITLE""Balancing the Color in an Image"IDREF="77301" TYPE="TITLE""Checking Color Distribution"IDREF="65268" TYPE="TITLE""Making Colors More Vivid"IDREF="50152" TYPE="TITLE""Highlighting Edges In an Image"LBL="" HELPID="imgworks.blurring"ID="68288"Blurring an ImageTo blur an image:Choose "Blur" from the Enhance menu. Drag the slider to change the degree of blur, or type a percentage in the field.Change the kernel size, if you want. Generally, a high blur factor and large kernel size produce a very blurry image. Click the Apply button to make your changes take effect. To return to the original image, choose "Undo" from the Edit menu.Click Reset to reset the blur scale.Click Close to close the blur window.LBL="" HELPID="imgworks.sharpening"ID="63683"Sharpening an ImageSharpening an image makes the colors more crisp. To sharpen an image:Choose "Sharpen" from the Enhance menu. Drag the slider to the right to sharpen the colors in the image, or type a percentage in the field.Change the kernel size, if you want. Generally, a high sharpen factor and large kernel size produce a very sharp image. Click Apply to make your changes take effect. To return to the original image, choose "Undo" from the Edit menu.Click Reset to reset the sharpen scale.Click Close to close the Sharpen window.LBL="" HELPID=""ID="30061"Converting an Image to Black and WhiteTo change a color image to black and white, choose "Color to Grayscale" from the Effects menu. To return to the original image, choose "Undo" from the Edit menu.LBL="" HELPID=""ID="83140"Converting an Image to a Photographic NegativeTo turn an image into a photographic negative, choose "Negate" from the Effects menu. To return to the original image, choose "Undo" from the Edit menu.LBL="" HELPID="imgworks.cropping"ID="36514"Cropping an ImageThe "Crop" command lets you cut an image, just as you would cut a picture using scissors. To crop an image:Choose "Crop/Add Margin" from the Transform menu. Pull down Add from the Crop button to add a margin to your image. A selection rectangle appears in the image. Size the image using the rectangle. You can also fill in the fields with the amount you would like to crop the image, in pixels.For example, if you enter 15 in the "pixels left" field, you snip 15 pixels off the left side of the image.Click the Choose Color button to change the color of the crop area or margin.Click Apply to initiate the changes. Choose "Undo" from the Edit menu to return to the original image.Click Close to close the window.LBL="" HELPID="imgworks.scaling"ID="25523"Resizing an ImageThe "Scale" command lets you resize an image and maintain the correct proportions (aspect ratio). To scale an image:Choose "Scale" from the Transform menu. Type the percentage by which you want to scale the image in the "Scale Factor" field or type the size (in pixels) that you want it to be. The program figures out the percentage for you.You can also resize by moving the handles on the corners of the image.Click Apply to implement the changes. Choose "Undo" from the Edit menu to return to the original image.Click Reset to reset the scale.Click Close to close the window.LBL="" HELPID="imgworks.stretching"ID="89706"Stretching an ImageThe "Stretch" command lets you resize an image without maintaining the aspect ratio. To stretch an image:Choose "Stretch" from the Transform menu. Type the percentage by which you want to stretch the image horizontally and vertically in the appropriate fields, or type the size (in pixels) that you want it to be. The program figures out the percentage for you.You can also stretch the handles on the corners of the image.Click Apply to implement the changes. Choose "Undo" from the Edit menu to return to the original image.Click Reset to reset the scale.Click Close to close the window.LBL="" HELPID=""ID="67918"Flipping an ImageYou can flip an image upside down or sideways using the "Flop Horizontal" and "Flip Vertical" commands in the Transform menu.LBL="" HELPID="imgworks.rotating"ID="13375"Rotating an ImageThe "Rotate" command lets you rotate an image counter-clockwise at any angle. To rotate an image:Choose "Rotate" from the Transform menu. Type in the "Rotate Image" field the degree by which you want to rotate the image.Click the Choose Color button to change the color of the crop area or margin.Click Apply to initiate the changes. Choose "Undo" from the Edit menu to return to the original image and remove any new color.Click Close to close the window.LBL="" HELPID="imgworks.reducingcolors"ID="82461"Lightening and Darkening Pixels in an ImageThe Threshold feature allows you to selectively lighten and darken pixels in your image. For grayscale images, it forces all of the pixels to be either white or black. For color images, it forces all of the pixels into primary colors (black, white, red, green, blue, yellow, cyan, and magenta). For example, in a black and white image, this means that you pick a gray level as a threshold. Everything lighter than the threshold gray becomes white. Everything darker than the threshold gray becomes black. Color images are handled just like black and white. The difference is that the threshold operation is done three times, once each for red, green, and blue.Use Threshold on scanned line art to make edges crisper and remove background noise, or on color images for special effects.To "threshold" an image, follow these steps:Choose "Threshold" from the Effects menu. A dialog box appears.To change the threshold level, drag the Threshold Level slider.The threshold level determines how pixels are darkened and lightened in the image. Generally, pixels darker than the threshold level become black. Pixels lighter than the threshold level become white.Click Apply to implement the changes. Choose "Undo" from the Edit menu to return to the original image.Click Reset to reset the scale.Click Close to close the window.LBL="" HELPID="imgworks.brightening"ID="13575"Brightening or Darkening an ImageTo brighten or darken an image, follow these steps:Choose "Brightness" from the Enhance menu. A dialog box appears.Drag the slider bar to the left to darken the image and to the right to lighten the image.Click Apply to implement the changes. Choose "Undo" from the Edit menu to return to the original image.Click Reset to reset the scale.Click Close to close the window.LBL="" HELPID="imgworks.contrast"ID="64056"Adjusting the Amount of Contrast in an ImageTo adjust the amount of contrast in an image:Choose "Contrast" from the Enhance menu. A dialog box appears.To change the contrast of the dark areas:Drag the Shadows slider to the left towards flatter to decrease the contrast, or to the right to darken the contrast.To change the contrast of the light areas:Drag the Highlights slider to the left towards flatter to decrease the contrast, or to the right to increase the contrast.Click Apply to implement the changes. Choose "Undo" from the Edit menu to return to the original image.Click Reset to reset the scale.Click Close to close the window.LBL="" HELPID="imgworks.posterize"ID="87209"Reducing the Number of Colors in an ImageThe Posterize feature reduces the number of colors in an image. Use this feature to create special effects. To posterize an image:Choose "Posterize" from the effects menu. A dialog box appears.To choose the number of color levels, enter a number between 2 and 256 in the "Posterize Level" field. A smaller number produces an image with fewer colors.Click Apply to implement the changes. Choose "Undo" from the Edit menu to return to the original image.Click Reset to reset the scale.Click Close to close the window.LBL="" HELPID="imgworks.balancingcolor"ID="37053"Balancing the Color in an ImageTo adjust the balance of color in an image, follow these steps:Choose "Color Balance" from the Enhance menu. A dialog box appears.To raise and lower the red, green, and blue, drag the appropriate sliders. To decrease the amount of color, drag towards less. To increase the amount of color, drag towards more.Click Apply to implement the changes. Choose "Undo" from the Edit menu to return to the original image.Click Reset to reset the scale.Click Close to close the window.LBL="" HELPID="imgworks.histogram"ID="77301"Checking Color DistributionA histogram graphically depicts the distribution of color in an image. Choose "Show Histogram" from the View menu. For a color image, three graphs are displayed, illustrating the red, green, and blue components of the image. For a grayscale image, one graph is displayed, illustrating the gray levels of the image.Very dark images will have higher peaks towards the left of the histogram graph. Very light images will have higher peaks towards the right of the histogram graph.To understand the relationship between an image and its histogram, leave it open while using the Negate, Color To Grayscale, Brightness, Contrast, Threshold, Posterize, Equalize, Color Saturation, Find Edges, and Color Balance features. Each time you change the image, the histogram automatically updates.When you finish viewing the histogram, click the Close button to close the histogram view.LBL="" HELPID="imgworks.saturate"ID="65268"Making Colors More VividChoose "Color Saturation" from the Enhance menu. Adjust the levels in the dialog box to make the colors more or less vivid.LBL="" HELPID="imgworks.findedges"ID="50152"Highlighting Edges In an ImageChoose "Find Edges" from the Effects menu. There are four methods that can be used to find and enhance edges: Roberts, Sobel, Laplace1, and Laplace2.These choices perform 2D orthogonal convolutions on the edges of an image to change the edge effects.LBL="3"ID="26680"Image Copy and Image Infoimgcopy and imginfo are command line tools that let you copy or get information about an image.LBL="" HELPID="imgworks.copy"ID="26395"Copying an ImageImgcopy lets you copy an image from one format type to another. You can copy the file into SGI, TIFF, or FIT formats. The imgcopy icon is on the MediaTools page of the Icon Catalog. To copy an image from one format to another, drag and drop an image icon on top of the imgcopy icon. A dialog box appears from which you can choose a different image format.To use the imgcopy shell command, at the prompt type:imgcopy <infile> <outfile.format>where   infile is the name of the file to be copied and   outfile.format is the name you want the new file to be called. See the manual page for a list of the command line options.LBL="" HELPID="imgworks.imginfo"ID="94855"Getting Information About an ImageImginfo displays information about size and format, image dimension in pixels, page size, data type, dimension order, color model, minimum and maximum pixel values, file format, data compression, and image description.The imginfo icon is on the MediaTools page of the Icon Catalog. Double-click the icon to open the application. A dialog box appears. Enter the pathname of the image about which you want information and press OK. Another window appears describing the image properties.To use the imginfo shell command, at the prompt type: imginfo <imgfile> and press <Enter>. LBL="4"ID="26680"ImgViewThis chapter contains these sections:IDREF="26200" TYPE="TITLE""About ImgView"IDREF="67224" TYPE="TITLE""Viewing Images"IDREF="59751" TYPE="TITLE""Arranging Images"IDREF="79056" TYPE="TITLE""Detail View"IDREF="37023" TYPE="TITLE""Look-up Table"IDREF="73053" TYPE="TITLE""Customizing"To open ImgView, double-click the imgview icon on the MediaTools page of the Icon Catalog. You can also type imgview in a shell window.LBL="" HELPID="imgview.about"ID="26200"About ImgViewImgView lets you open one or more images and view them in the imgView window. You can arrange multiple images in the window and save the arrangement to one of several file formats. It also lets you see a detailed (zoomed) view of an image and edit the colormap used to display an image.The ImgView window contains two menus and a help menu:FileAllows you to open, save, or remove an image, and quit the ImgView tool.ViewAllows you to arrange and change the size of views. You can also start the Detail View and Lookup Table editor from the View menu.The balance of the ImgView window is the image area. ImgView is shown in IDREF="59688" TYPE="GRAPHIC"Figurename='nbsp' font=fixed charset=iso-8859-1 code=1604-1
.FILE="ch4-1.bw" POSITION="INLINE" SCALE="FALSE"LBL="4-1"Figure 4-1 
ID="59688"The ImgView windowLBL="" HELPID="imgview.viewing"ID="67224"Viewing ImagesImgView can display as many images in its main window as you like. Each image is displayed in a view. A view is a movable window on the image, it can be arbitrarily sized and positioned on the overall image being displayed as shown in IDREF="70749" TYPE="GRAPHIC"Figurename='nbsp' font=fixed charset=iso-8859-1 code=1604-2
.FILE="ch4-2.bw" POSITION="INLINE" SCALE="FALSE"LBL="4-2"Figure 4-2 
ID="70749"View of an imageYou can crop an image by resizing the view and saving the view of the image rather than saving the whole image. You can also compose multiple images by arranging the views and then saving the whole window. See IDREF="59751" TYPE="TITLE""Arranging Views."These sections describe how to use ImgView:IDREF="46458" TYPE="TITLE""Opening an Image"IDREF="42339" TYPE="TITLE""Saving an Image"IDREF="57241" TYPE="TITLE""Removing an Image"ID="76248"LBL="" HELPID=""ID="46458"Opening an ImageTo open an image:Select "Open..." from the File menu. You can navigate through directories using the Up button or by clicking on a subdirectory in the scrolling list. Select the file you want to open from the file browser.Click Accept.LBL="" HELPID=""ID="42339"Saving an ImageTo save an image:Click on the image you want to save with the left mouse button. It will be outlined in red.Select "Save..." from the File menu. Type in the name of the image file you want to create in the "File name" field.Select the save area and file format option by clicking the appropriate buttons.Click the Accept button.Click Cancel to dismiss the file browser without saving your file.LBL="" HELPID=""Choosing a File FormatThe ImageVision tools can save images in TIFF, SGI, and FIT formats. The tools can read files stored in TIFF, FIT, SGI, GIF, and PhotoCD formats.The TIFF format is the most common and useful file format. The SGI format is used by applications on Silicon Graphics systems, including IRIS Showcase. The FIT format is not a standard, but is supported by the ImageVision Library (IL).LBL="" HELPID=""ID="57241"Removing an ImageTo remove an image from the set of viewed images:With the left mouse button, select the image you want to remove.The image is outlined in red. You can select additional images by holding the shift key while clicking the left mouse button over these images. Each additional view is also outlined in red.Select "Remove" from the File menu. You can also use the Delete key.The image is removed from the list of viewed images; they are not deleted from the file system.LBL="" HELPID="imgview.arranging"ID="59751"Arranging ViewsWhen multiple images are displayed they are stacked as individual views. Views higher in the stack obscure those lower in the stack, as shown in IDREF="82965" TYPE="GRAPHIC"Figurename='nbsp' font=fixed charset=iso-8859-1 code=1604-3
. FILE="stack.bw" POSITION="INLINE" SCALE="FALSE"LBL="4-3"Figure 4-3 
ID="82965"Arranging images in a window.These sections describe how to use ImgView to rearrange views:IDREF="75964" TYPE="TITLE""Selecting Views"IDREF="96911" TYPE="TITLE""Wiping the Edges"IDREF="11749" TYPE="TITLE""Resizing the Edges"IDREF="99950" TYPE="TITLE""Moving an Image in a View"IDREF="95611" TYPE="TITLE""Roaming Through a View"IDREF="84924" TYPE="TITLE""Auto-Roam, Auto-Move, and Pan"IDREF="95215" TYPE="GRAPHIC"Figurename='nbsp' font=fixed charset=iso-8859-1 code=1604-4 describes how to use the mouse to resize, wipe, move, and roam through views. Each of the words in the table is linked to a section that describes the mouse function.FILE="ch4-3.bw" POSITION="INLINE" SCALE="FALSE"LBL="4-4"Figure 4-4 
ImgView mouse functions.ID="95215"The View menu contains the following commands:RGB or Double BufferPick RGB or double-buffered mode. RGB picks 24 bit or color index mode. Pick double-buffer to toggle to double-buffered mode.Select AllSelects all of the views in the window.DetailProvides information on the selected view.Look-upProvides a way to color balance.CenterPlaces the center of the image in the center of the window. Can also be invoked with the Home key.SplitArranges all of the images in the view side by side with each image centered in its view. Two images are arranged in as square a grid as possible. Can also be invoked using Ctrl-s.AbutPlaces images in the same position in the window. This is useful when comparing different images of the same area and size. Can also be invoked using Ctrl-a.RaiseMoves the image up in the stack of images. You can also use the up arrow key to raise the image in a stack.LowerMoves the image to the bottom of the stack. You can also use the down arrow key to lower the image in a stack.LBL="" HELPID=""ID="75964"Selecting ViewsTo move views around in the window, select the view you want to move with the mouse or use the "Select All" command. Selected views are outlined in red. Select additional views by holding the shift key and clicking the left mouse button on those views. Each additional view is also outlined in red. You can also select all the views with the Alt-a keys.LBL="" HELPID=""ID="96911"Wiping EdgesTo wipe or adjust the edge or corner of a selected view, move the mouse near the edge of the view to be adjusted. When the pointer changes shape to indicate it is near the edge, click and hold down the left mouse button. As you drag the mouse the edge or corner follows until you hit the edge of the image or release the mouse button.To wipe the boundary between selected adjacent views, position the mouse at the boundary between the views. Hold down the Alt key and click and hold down the left mouse button. As you drag the mouse the corners follow until you hit the edge of an image or release the mouse button.LBL="" HELPID=""ID="11749"Resizing ViewsTo resize or adjust the opposite edges of a selected view, move the mouse near the edge or corner of the view to be adjusted. Hold down the Ctrl key and click and drag the mouse. The edge or corner chosen follows the mouse until you hit the edge of the image or release the mouse button. The opposite edge or corner moves in the opposite direction, effectively resizing the view without shifting the position of the image in the window.LBL="" HELPID=""ID="99950"Moving a ViewTo move a selected view, move the mouse over the view but away from the edge so that the crossed arrow cursor appears. Click and hold down the left mouse button. Drag the mouse to reposition the view. LBL="" HELPID=""ID="95611"Roaming an ImageClick and hold down the middle mouse in a view to roam the image. You can also roam through a view by positioning the mouse away from the view edge and dragging the mouse while depressing the left mouse button and holding down the Alt key. This pans the view across the image without changing the images's position on the screen. LBL="" HELPID=""ID="84924"Auto-Roam, Auto-Move, and PanHolding down the Ctrl key during a move or roam causes the view or image to move automatically in the direction of the mouse relative to the starting position. LBL="" HELPID="imgview.detail"ID="79056"Detail ViewThe Detail option under the View menu pops up a detailed (zoomed) view of an image as shown in IDREF="78481" TYPE="GRAPHIC"Figurename='nbsp' font=fixed charset=iso-8859-1 code=1604-5
.FILE="detail.bw" POSITION="INLINE" SCALE="FALSE"LBL="4-5"Figure 4-5 
ID="78481"Detail viewThe information in this view tracks the mouse position in the main window. When you are finished, click the Done button.LBL="" HELPID="imgview.lookup"ID="37023"Look-up TableThe "Lookup..." command in the View menu launches a look-up table editor for the currently selected view. Before choosing this item, select a view with the left mouse button.This editor lets you define a piecewise linear mapping of intensity values in the selected image. The initial state is a linear ramp for all colors. Use the buttons to control the editing of a ramp for all colors or for one of the red, green, or blue color components. When you are editing all colors the ramp is shown in black, when you are editing one color, all three ramps are shown in red, green, and blue, with the currently active ramp on top. Reset the active ramp to the original linear ramp with the Set to linear button.The ramp is composed of a series of straight segments drawn between breakpoints. The breakpoints appear as crosses. The horizontal axis represents the intensity levels of the original image. The vertical axis represents the intensity level that original level will be mapped to. To manipulate the ramp, move, insert, or delete the breakpoints with the mouse.To move a point, place the mouse near one of the breakpoints and press and hold down the left mouse button. Drag the mouse cursor to the nearest point to any valid location on the graph; ImgView prevents you from making an ill-defined mapping that maps an input value to multiple output values.To insert a point, place the cursor near one of the linear segments and press and hold the middle mouse button. A point is inserted on the nearest segment. Holding down the mouse button, drag the point to any valid location on the graph.To delete a point, place the mouse cursor near one of the breakpoints and click the right mouse button. The nearest point is deleted.While you are dragging a point the caption below the graph shows the corresponding input value and the value it will be mapped to. On faster systems the displayed image is updated continuously as you drag a point. Slower systems update the image when you release the mouse button.LBL="" HELPID="imgview.customize"ID="73053"CustomizingImgView has three customization options you can set using X resources from your   .Xdefaults file.imgview* geometryDetermines the position and size of the ImgView window when ImgView starts up. You must supply a standard X geometry specification.imgview* noBorder: True/FalseDetermines whether or not ImgView starts out with window decorations. if set to false, ImgView uses a pop-up menu in place of the standard menu bar. The default is to have window decorations and a pull-down menu.imgview*noAutoScale: True/FalseTurns autoScale mode on/off. In the default mode (on) the images are scaled from the minimum and maximum range to 0 to 255 for display. If autoScale is off, then the images are not scaled.