Glossary | Canon 4.1 instruction

Glossary

Auto Tone Correction

A function that uses brightness/contrast and gamma value settings to automatically analyze and adjust images.

Bits/Bit Numbers

Each dot of a 1-bit image is assigned either black or white according to the threshold brightness value, resulting in the image being reproduced in just those two colors. Each dot of an 8-bit grayscale image can be assigned any one of 256 tones of gray, ranging from pure white to black. Each dot of a 24-bit color image can be assigned any one of 16.7 million colors since each of its color channels (red, green and blue) can be expressed in 256 distinct color tones (8 bits).

Black and White

An image mode used to reproduce images in two tones only: black and white. The brightness level at which a dot is determined to be either black or white is called the threshold value, which can be adjusted. See Threshold Value.

Black Eyedropper Tool

Tool used to the select the darkest portion of an image in the preview area. Used with the Histogram function to adjust image brightness. When this tool is clicked on the image, all areas that are darker are set to pure black.

Brightness

The intensity of light in a scanned image. Raising an image’s brightness increases its overall brilliance, while decreasing it makes it darker.

Color Balance

The function in that enables you to adjust the blend of colors in a color image. You can adjust the color balance by altering the blend of the red, green and blue color set or the cyan, magenta, yellow and black color set.

Color Channel

Any one of the red, green or blue elements of a color image. Since color images are assigned 8 bits per pixel for each of the red, green and blue channels, each pixel is assigned 24 bits of data. The master channel is the composite of these three channels. In the Histogram and Tone Curve image adjustment functions, each channel can be separately or collectively adjusted.

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Canon 4.1 manual Glossary

Contents

Users Guide How to Make Best Use of the Manuals When you open the box How to Use this Guide Where to LookAbout the Conventions Used in this Guide Table of Contents Adjusting Scanned Images Installing Plug-in Module CS-U Operating Environment Control Panel Features Pp -20Image Size Scanning Procedures E P Plug-in Module CS-U Special Features Start Plug-in Module CS-U p Install Plug-in Module CS-UQuick Start Instructions Position materials for scanning and preview them. p Select the area to be scanned by clicking and dragging Verify Image Quality with the Browser Function beforeSpecify the Area of the Image to be Scanned Mouse pointer over the image Click on the Scan button Scan the ImageSave the Scanned Image Save the image with Adobe Photoshop LE or other plug-in E P Displaying the Plug-in Module CS-U Control Panel RGB Values Operating Procedures Procedures Positioning OriginalsPlace the original on the scanners document glass Previewing Click on the Preview button Selecting the Output Device Setting the Resolution and Magnification Output Device Resolution= 720 dpi, Magnification= 100% To Set the Magnification Factor Set the desired magnification factor on the control panel Setting the Scan Mode Click the arrow beside Scan Mode Select a scan mode from the pop-up menu Verifying the Image before Scanning To Verify the Image Rotating the Image Use these buttons to rotate the image Setting Preferences Output DeviceAspect Ratio Unit Preview Window Close Plug-in After Scan Reset Default SettingsShut off lamp time Platen/Film Operating Procedures Scanning Setting the Scan Area Position the pointer in the preview window Procedures to Zoom ZoomingSelect the area you want to enlarge with the zoom function Click on the Zoom In button Specify the Scan Area ScanningTo Initiate the Scan Click close box to guit the Plug-in Module CS-U Saving Scanned Images Enter a name for the file and click the Save button Scanning Film Auto Exposure Save Exposure Data Click on the Scan button Remove Dust and Scratches CanoScan D2400U only Bit/14/16bit Grayscale and 24-bit/42/48bit Color Black & WhiteBit Color Tone Adjustment Tone Adjustment Dialog Histogram Settings How to Interpret Histograms To Adjust a Histogram How to Adjust Histograms Click on the OK button Shadow Mark Tone Curve Settings Manipulating the Graph To Edit the Tone Curve Click the OK button Relationship Between the Tone Curve Image Brightness Gamma Value = Brightness and Contrast Settings ContrastBrightness To Adjust the Brightness and Contrast Adjusting the Color Balance Operating Procedure Gamma Value Settings Matching the Gamma Value to the Display CharacteristicsGamma value To Change the Gamma Value Settings Adjusting the Threshold Value To Set the Threshold Value Recommended Auto Tone CorrectionTo Set the Auto Tone Correction ColorSync Unsharp Mask Open the Image menu and select Unsharp Mask Descreen Open the Image menu and select Descreen High-speed Scan Mode Select High-speed Scan Mode from the Image menu Saving/Recalling Settings To Save Settings in a Settings FileClick the Save button To Recall a Settings File Matching Scan Resolution to Purpose Scanning Techniques Appendices Troubleshooting Problem Scan button cannot be selected Problem Scanning is taking a long time Problem Scanning quality is poor Error Messages Error Message CauseResponse Glossary Color Dot Histogram Optical ResolutionGrayscale Image File Plug-in Software ResolutionPixel Preview Area Threshold Value Scan ModeShadows Tone Curve Index Output device 7, 11, 18, 25 Scan 12, 33 Scan area 11 Canon Customer Support Help Desk Canon U.S.A., INC