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− | == Replacing pixel/voxel value in images == | + | You can replace the values of pixels or voxels in images by using the Replace pixel/voxel values command on the Utilities menu. Suppose, for example, that you have a set of images that contain <span style="font-weight: normal; text-decoration: none; text-transform: none; vertical-align: baseline">''<font color="#000000">not a number</font>''</span> (NaN) values. To be able to use MIPAV algorithms on those images, you first need to replace those not a number values. The Replace pixel/voxel value command provides an easy way to replace those values or any pixel or voxel values.<br /> |
| + | '''To replace pixel or voxel value in images'''<br /> |
| + | 1 Open the image whose pixels or voxels you want to change.<br /> |
| + | 2 Select Utilities > Replace pixel/voxel values. <br /> |
| + | The Replace Pixel/Voxel Value dialog box (Figure 52) opens.<br /> |
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− | <div style="font-style: normal; font-weight: normal; margin-bottom: 6pt; margin-left: 0pt; margin-right: 0pt; margin-top: 0pt; text-align: left; text-decoration: none; text-indent: 0pt; text-transform: none; vertical-align: baseline"><font color="#000000"> You can replace the values of pixels or voxels in images by using the Replace pixel/voxel values command on the Utilities menu. Suppose, for example, that you have a set of images that contain <span style="font-weight: normal; text-decoration: none; text-transform: none; vertical-align: baseline">''<font color="#000000">not a number</font>''</span> (NaN) values. To be able to use MIPAV algorithms on those images, you first need to replace those not a number values. The Replace pixel/voxel value command provides an easy way to replace those values or any pixel or voxel values.<br /></font></div><div style="font-style: normal; margin-bottom: 6pt; margin-left: 0pt; margin-right: 0pt; margin-top: 14pt; text-align: left; text-decoration: none; text-indent: 0pt; text-transform: none; vertical-align: baseline">'''<font color="#000000"> To replace pixel or voxel value in images<br /></font>'''</div><div style="font-style: normal; font-weight: normal; margin-bottom: 0pt; margin-left: 18pt; margin-right: 0pt; margin-top: 6pt; text-align: left; text-decoration: none; text-indent: -18pt; text-transform: none; vertical-align: baseline"><font color="#000000"> 1 Open the image whose pixels or voxels you want to change.<br /></font></div><div style="font-style: normal; font-weight: normal; margin-bottom: 0pt; margin-left: 18pt; margin-right: 0pt; margin-top: 6pt; text-align: left; text-decoration: none; text-indent: -18pt; text-transform: none; vertical-align: baseline"><font color="#000000"> 2 Select Utilities > Replace pixel/voxel values. <br /></font></div><div style="font-style: normal; font-weight: normal; margin-bottom: 0pt; margin-left: 18pt; margin-right: 0pt; margin-top: 6pt; text-align: left; text-decoration: none; text-indent: 0pt; text-transform: none; vertical-align: baseline"><font color="#000000"> The Replace Pixel/Voxel Value dialog box (Figure 52) opens.<br /></font></div><div style="font-style: normal; font-weight: normal; margin-bottom: 0pt; margin-left: 0pt; margin-right: 0pt; margin-top: 0pt; text-align: left; text-decoration: none; text-indent: 0pt; text-transform: none; vertical-align: baseline"><font color="#000000"> <br /></font></div><div style="font-style: normal; font-weight: normal; margin-bottom: 0pt; margin-left: 0pt; margin-right: 0pt; margin-top: 0pt; text-align: left; text-decoration: none; text-indent: 0pt; text-transform: none; vertical-align: baseline"><font color="#000000">
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− | |+ <div style="font-style: normal; margin-bottom: 3pt; margin-left: 0pt; margin-right: 0pt; margin-top: 9pt; text-align: left; text-decoration: none; text-indent: 0pt; text-transform: none; vertical-align: baseline">'''<font color="#000000"> Figure 52. Replace Pixel/Voxel Value dialog box<br /></font>'''</div> | + | |+ '''Figure 52. Replace Pixel/Voxel Value dialog box''' |
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− | <br /></font></div><div style="font-style: normal; font-weight: normal; margin-bottom: 0pt; margin-left: 18pt; margin-right: 0pt; margin-top: 6pt; text-align: left; text-decoration: none; text-indent: -18pt; text-transform: none; vertical-align: baseline"><font color="#000000"> 3 Do one of the following:<br /></font></div><div style="font-style: normal; font-weight: normal; margin-bottom: 0pt; margin-left: 36pt; margin-right: 0pt; margin-top: 6pt; text-align: left; text-decoration: none; text-indent: -18pt; text-transform: none; vertical-align: baseline"><font color="#000000"> a Select User defined value and type the value that you want to replace in the text box<br /></font></div><div style="font-style: normal; font-weight: normal; margin-bottom: 0pt; margin-left: 36pt; margin-right: 0pt; margin-top: 6pt; text-align: left; text-decoration: none; text-indent: -18pt; text-transform: none; vertical-align: baseline"><font color="#000000"> b Select Presets and then select one of the following in the list box:<br /></font></div><div style="font-style: normal; font-weight: normal; margin-bottom: 0pt; margin-left: 48pt; margin-right: 0pt; margin-top: 6pt; text-align: left; text-decoration: none; text-indent: -12pt; text-transform: none; vertical-align: baseline"><font color="#000000"> <span style="font-weight: normal; text-decoration: none; text-transform: none; vertical-align: baseline">''<font color="#000000">NaN</font>''</span>-Not a number<br /></font></div><div style="font-style: normal; font-weight: normal; margin-bottom: 0pt; margin-left: 48pt; margin-right: 0pt; margin-top: 6pt; text-align: left; text-decoration: none; text-indent: -12pt; text-transform: none; vertical-align: baseline"><font color="#000000"> <span style="font-style: normal; font-weight: normal; text-decoration: none; text-transform: none; vertical-align: baseline"><font color="#000000">[[Image:fieldvalueInfinity.jpg]] </font></span>-Positive infinity<br /></font></div><div style="font-style: normal; font-weight: normal; margin-bottom: 0pt; margin-left: 48pt; margin-right: 0pt; margin-top: 6pt; text-align: left; text-decoration: none; text-indent: -12pt; text-transform: none; vertical-align: baseline"><font color="#000000"> <span style="font-style: normal; font-weight: normal; text-decoration: none; text-transform: none; vertical-align: baseline"><font color="#000000">[[Image:fieldvalueNotInfinity.jpg]] </font></span>-Negative infinity<br /></font></div><div style="font-style: normal; font-weight: normal; margin-bottom: 0pt; margin-left: 18pt; margin-right: 0pt; margin-top: 6pt; text-align: left; text-decoration: none; text-indent: -18pt; text-transform: none; vertical-align: baseline"><font color="#000000"> 4 Do one of the following:<br /></font></div><div style="font-style: normal; font-weight: normal; margin-bottom: 0pt; margin-left: 36pt; margin-right: 0pt; margin-top: 6pt; text-align: left; text-decoration: none; text-indent: -12pt; text-transform: none; vertical-align: baseline"><font color="#000000"> Accept the default value in Replace with.<br /></font></div><div style="font-style: normal; font-weight: normal; margin-bottom: 0pt; margin-left: 36pt; margin-right: 0pt; margin-top: 6pt; text-align: left; text-decoration: none; text-indent: -12pt; text-transform: none; vertical-align: baseline"><font color="#000000"> Type another value in the text box.<br /></font></div><div style="font-style: normal; font-weight: normal; margin-bottom: 0pt; margin-left: 18pt; margin-right: 0pt; margin-top: 6pt; text-align: left; text-decoration: none; text-indent: -18pt; text-transform: none; vertical-align: baseline"><font color="#000000"> 5 Select one of the following:<br /></font></div><div style="font-style: normal; font-weight: normal; margin-bottom: 0pt; margin-left: 36pt; margin-right: 0pt; margin-top: 6pt; text-align: left; text-decoration: none; text-indent: -12pt; text-transform: none; vertical-align: baseline"><font color="#000000"> <span style="font-weight: normal; text-decoration: none; text-transform: none; vertical-align: baseline">''<font color="#000000">New image</font>''</span>-To create a new image in its own image window using the replaced value<br /></font></div><div style="font-style: normal; font-weight: normal; margin-bottom: 0pt; margin-left: 36pt; margin-right: 0pt; margin-top: 6pt; text-align: left; text-decoration: none; text-indent: -12pt; text-transform: none; vertical-align: baseline"><font color="#000000"> <span style="font-weight: normal; text-decoration: none; text-transform: none; vertical-align: baseline">''<font color="#000000">Replace image</font>''</span>-To overwrite the original image in the original image window with an image using the replaced value<br /></font></div><div style="font-style: normal; font-weight: normal; margin-bottom: 0pt; margin-left: 18pt; margin-right: 0pt; margin-top: 6pt; text-align: left; text-decoration: none; text-indent: -18pt; text-transform: none; vertical-align: baseline"><font color="#000000"> 6 Click OK. The image with the replaced value appears in either a new window or in the original image window.<br />
| + | 3 Do one of the following:<br /> |
| + | *a Select User defined value and type the value that you want to replace in the text box<br />< |
| + | *b Select Presets and then select one of the following in the list box:<br /> |
| + | ** ''NaN'' -Not a number<br /> |
| + | ** [[Image:fieldvalueInfinity.jpg]]-Positive infinity<br /> |
| + | ** [[Image:fieldvalueNotInfinity.jpg]] -Negative infinity<br /> |
| + | 4 Do one of the following:<br /> |
| + | *Accept the default value in Replace with.<br /> |
| + | *Type another value in the text box.<br /> |
| + | 5 Select one of the following:<br /> |
| + | * ''New image'' -To create a new image in its own image window using the replaced value<br /> |
| + | * ''Replace image'' -To overwrite the original image in the original image window with an image using the replaced value<br /> |
| + | 6 Click OK. The image with the replaced value appears in either a new window or in the original image window.<br /> |
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| [[Rotating images]] | | [[Rotating images]] |
Revision as of 20:07, 22 February 2012
You can replace the values of pixels or voxels in images by using the Replace pixel/voxel values command on the Utilities menu. Suppose, for example, that you have a set of images that contain not a number (NaN) values. To be able to use MIPAV algorithms on those images, you first need to replace those not a number values. The Replace pixel/voxel value command provides an easy way to replace those values or any pixel or voxel values.
To replace pixel or voxel value in images
1 Open the image whose pixels or voxels you want to change.
2 Select Utilities > Replace pixel/voxel values.
The Replace Pixel/Voxel Value dialog box (Figure 52) opens.
Figure 52. Replace Pixel/Voxel Value dialog box
User-defined value
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Specifies the value that you want to replace in the image.
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Presets
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NaN-Not a number. -Positive infinity. -Negative infinity.
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Replace with
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Accept the default value or type another value.
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New image
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Shows in a new image window the image in which the value was replaced.
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Replace image
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Replaces the current image with the image in which the value was replaced.
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OK
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Applies the parameters that you specified to subsample the image.
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Cancel
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Disregards any changes you made in this dialog box, closes the dialog box, and does not subsample the image.
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Help
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Displays online help for this dialog box.
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3 Do one of the following:
- a Select User defined value and type the value that you want to replace in the text box
<
- b Select Presets and then select one of the following in the list box:
- NaN -Not a number
- -Positive infinity
- -Negative infinity
4 Do one of the following:
- Accept the default value in Replace with.
- Type another value in the text box.
5 Select one of the following:
- New image -To create a new image in its own image window using the replaced value
- Replace image -To overwrite the original image in the original image window with an image using the replaced value
6 Click OK. The image with the replaced value appears in either a new window or in the original image window.
Rotating images