Canon 3000F PhotoStudio_manual.pdf - Page 58

Equalizing Color Distribution, Using Threshold, Using Unsharp Mask

Get Canon 3000F - CanoScan Scanner PDF manuals and user guides
UPC - 013803028430
View all Canon 3000F manuals
Add to My Manuals
Save this manual to your list of manuals

Page 58 highlights

9 Enhancing Images Equalizing Color Distribution The Equalization command is used for enhancing an image's contrast and fine details. To equalize an image's bright and dark areas: • Click Enhance on the Main Menu, then choose Equalization. Using Threshold The Threshold command transforms any image into a dramatic, high-contrast, black and white graphic. To use the Threshold: 1. Click Enhance on the Main Menu, then choose Threshold from the drop-down menu. This brings up the Threshold dialog box. 2. Drag the Threshold Level slider to adjust the black and white threshold value. 3. Click the plus or minus sign under the Before window to zoom in or out on the image in both windows. 4. View different parts of the image by dragging within the Before or After window. 5. Preview the effect in the After window before applying it. 6. Click OK to apply the adjustment, or press Cancel to abort. Using Unsharp Mask The Unsharp Mask command sharpens images using fine adjustment controls, and is often the preferred sharpening tool for digital image editing professionals. To use the Unsharp Mask command: 1. Click Enhance on the Main Menu, choose Sharpen Filters from the drop-down menu, then select Unsharp Mask from the submenu. This brings up the Unsharp Mask dialog box. 2. Drag the Square Size slider to determine the size of the sampling area around each pixel. 3. Drag the Effect slider to adjust the intensity of the sharpening. 4. Drag the Threshold slider to set a value for the difference in color/grayness between adjacent pixels. 5. Click the plus or minus sign under the Before window to zoom in or out on the image in both windows. 6. View different parts of the image by dragging within the Before or After window. 7. Preview the effect in the After window before applying it. 8. Click OK to sharpen the image, or press Cancel to abort. Note: 1) The larger the Square Size value, the stronger the effect. 2) The larger the Effect value, the stronger the effect. 3) The smaller the Threshold value, the stronger the effect. 9-4 Enhancing Images

  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 7
  • 8
  • 9
  • 10
  • 11
  • 12
  • 13
  • 14
  • 15
  • 16
  • 17
  • 18
  • 19
  • 20
  • 21
  • 22
  • 23
  • 24
  • 25
  • 26
  • 27
  • 28
  • 29
  • 30
  • 31
  • 32
  • 33
  • 34
  • 35
  • 36
  • 37
  • 38
  • 39
  • 40
  • 41
  • 42
  • 43
  • 44
  • 45
  • 46
  • 47
  • 48
  • 49
  • 50
  • 51
  • 52
  • 53
  • 54
  • 55
  • 56
  • 57
  • 58
  • 59
  • 60
  • 61
  • 62
  • 63
  • 64
  • 65
  • 66
  • 67
  • 68
  • 69
  • 70
  • 71
  • 72
  • 73
  • 74
  • 75
  • 76
  • 77
  • 78
  • 79
  • 80
  • 81
  • 82
  • 83
9
Enhancing Images
9-4
Enhancing Images
Equalizing Color Distribution
The
Equalization
command is used for enhancing an image’s contrast and fine details.
To equalize an image’s bright and dark areas:
•
Click Enhance on the Main Menu, then choose Equalization.
Using Threshold
The
Threshold
command transforms any image into a dramatic, high-contrast, black and white graphic.
To use the
Threshold
:
1. Click
Enhance
on the Main Menu, then choose Threshold from the drop-down menu. This brings up the
Threshold dialog box.
2. Drag the
Threshold Level
slider to adjust the black and white threshold value.
3. Click the
plus
or minus sign under the Before window to zoom in or out on the image in both windows.
4. View different parts of the image by dragging within the
Before
or
After
window.
5. Preview the effect in the
After
window before applying it.
6. Click
OK
to apply the adjustment, or press
Cancel
to abort.
Using Unsharp Mask
The
Unsharp Mask
command sharpens images using fine adjustment
controls, and is often the preferred sharpening tool for digital image
editing professionals.
To use the
Unsharp Mask
command:
1. Click
Enhance
on the Main Menu, choose
Sharpen Filters
from
the drop-down menu, then select
Unsharp Mask
from the
submenu. This brings up the Unsharp Mask dialog box.
2. Drag the
Square Size
slider to determine the size of the
sampling area around each pixel.
3. Drag the
Effect
slider to adjust the intensity of the sharpening.
4. Drag the
Threshold
slider to set a value for the difference in
color/grayness between adjacent pixels.
5. Click the
plus
or
minus
sign under the Before window to zoom
in or out on the image in both windows.
6. View different parts of the image by dragging within the
Before
or
After
window.
7. Preview the effect in the
After
window before applying it.
8. Click
OK
to sharpen the image, or press
Cancel
to abort.
Note:
1) The larger the
Square Size
value, the stronger the effect.
2) The larger the
Effect value
, the stronger the effect.
3) The smaller the
Threshold
value, the stronger the effect.