














Create Raster Entity Manipulation, or REM, objects to edit your raster entities similar to editing AutoCAD objects.
Transcript
00:03
In AutoCAD Raster Design, you can use Raster Entity Manipulation, or REM, to edit raster images.
00:11
For example, REM allows you to change the radius of a circle, remove lines on a mechanical drawing,
00:17
or copy symbols from one image to another.
00:20
Editing with REM commands involves three steps.
00:24
First, you create raster entities, which include regions, enhanced bitonal regions, and primitives.
00:31
Then, you perform the edits.
00:34
Finally, you merge the raster entities back into the image.
00:38
The image here includes a variety of details on a plan sheet in raster format.
00:43
In this example, you want to make room for new work by moving one of the details.
00:48
First, you need to create a raster entity, or in this case, an REM region object.
00:54
A region object allows you to work with the pixels inside a specified area.
00:59
On the ribbon, Raster Tools tab, REM panel, expand the Create Region drop-down and choose Rectangular.
01:06
Zoom in to the detail you want to change—here, the Index Finger—and click two different points to define a rectangle around it.
01:15
Now, moving the rectangular region object includes all data within the defined rectangle.
01:22
From the ribbon, Home tab, Modify panel, select the Move tool.
01:26
Click the rectangular region to select it.
01:29
Then, press ENTER to complete the selection.
01:31
Click the lower-left corner of the rectangle to define the base point, and then drag to move the rectangle to the right and down slightly.
01:39
Click again to set the new location of all data inside the region.
01:44
To make the change permanent, select the Raster Tools tab, and in the REM panel, click Merge to Raster Image.
01:51
Select the object to merge—here, the rectangular region—and then press ENTER.
01:57
The entity merges back into the original image.
02:01
The next example uses an REM enhanced bitonal region, which allows you to select complete raster entities in a bitonal image.
02:10
On the REM panel, select Enhanced Region to expand the drop-down and view the list of regions.
02:17
You can also choose regions using windows or crossings.
02:21
In this case, click Connected Entity.
02:24
On the image, click anywhere on the Mandrel Rib Plate.
02:28
The entire entity appears highlighted, because Raster Design finds all raster data associated with the part.
02:35
Click the Home tab, and then in the Modify panel, click Copy.
02:40
Select the entity to copy, the highlighted mandrel rib plate, and then press ENTER.
02:45
Click the lower-left corner of the detail to set the base point, and then drag up and to the right of the original.
02:52
Click to place the new entity in the empty space resulting from moving the Index Finger.
02:57
Press ENTER to make the copy.
03:00
Switch back to the Raster Tools tab, and then on the REM panel, click Merge to Raster Image.
03:07
Select the copy of the entity, and then press ENTER to merge it back into the image.
03:13
Since the original entity was not changed, simply clear it.
03:18
You can either click Clear Selected, select the entity, and then press ENTER, or click Clear All.
03:24
While you could also use raster editing tools to perform similar edits,
03:29
the value of REM commands is that they can significantly reduce the number of editing steps.
03:35
After defining REM objects, you can use either AutoCAD commands
03:40
or AutoCAD Raster Design toolset commands to edit the objects in the same way as vector objects.
03:47
To illustrate this point, the next example modifies only a portion of a raster image using a primitive.
03:55
Because their dimensions can be changed, primitives are more intelligent than regions and enhanced bitonal regions.
04:03
On the REM panel, expand the Create Primitive drop-down and select Circle.
04:10
On the copy of the mandrel rib plate you just created, click the outer circle.
04:14
AutoCAD Raster Design creates a circle, which you can now modify using editing grips.
04:20
Click the circle, and then click a grip and drag to expand the circle.
04:26
Drag the opposite way to make it smaller than the original, and the underlying raster circle disappears, replaced by the smaller one.
04:34
On the REM panel, click Merge to Raster Image to merge the smaller circle into the image.
04:40
As you can see, raster entity manipulation, or REM allows you to modify specific raster data elements in ways similar to editing vector data.
04:50
The streamlined functionality of REM saves you steps and time when compared with standard raster editing tools.
00:03
In AutoCAD Raster Design, you can use Raster Entity Manipulation, or REM, to edit raster images.
00:11
For example, REM allows you to change the radius of a circle, remove lines on a mechanical drawing,
00:17
or copy symbols from one image to another.
00:20
Editing with REM commands involves three steps.
00:24
First, you create raster entities, which include regions, enhanced bitonal regions, and primitives.
00:31
Then, you perform the edits.
00:34
Finally, you merge the raster entities back into the image.
00:38
The image here includes a variety of details on a plan sheet in raster format.
00:43
In this example, you want to make room for new work by moving one of the details.
00:48
First, you need to create a raster entity, or in this case, an REM region object.
00:54
A region object allows you to work with the pixels inside a specified area.
00:59
On the ribbon, Raster Tools tab, REM panel, expand the Create Region drop-down and choose Rectangular.
01:06
Zoom in to the detail you want to change—here, the Index Finger—and click two different points to define a rectangle around it.
01:15
Now, moving the rectangular region object includes all data within the defined rectangle.
01:22
From the ribbon, Home tab, Modify panel, select the Move tool.
01:26
Click the rectangular region to select it.
01:29
Then, press ENTER to complete the selection.
01:31
Click the lower-left corner of the rectangle to define the base point, and then drag to move the rectangle to the right and down slightly.
01:39
Click again to set the new location of all data inside the region.
01:44
To make the change permanent, select the Raster Tools tab, and in the REM panel, click Merge to Raster Image.
01:51
Select the object to merge—here, the rectangular region—and then press ENTER.
01:57
The entity merges back into the original image.
02:01
The next example uses an REM enhanced bitonal region, which allows you to select complete raster entities in a bitonal image.
02:10
On the REM panel, select Enhanced Region to expand the drop-down and view the list of regions.
02:17
You can also choose regions using windows or crossings.
02:21
In this case, click Connected Entity.
02:24
On the image, click anywhere on the Mandrel Rib Plate.
02:28
The entire entity appears highlighted, because Raster Design finds all raster data associated with the part.
02:35
Click the Home tab, and then in the Modify panel, click Copy.
02:40
Select the entity to copy, the highlighted mandrel rib plate, and then press ENTER.
02:45
Click the lower-left corner of the detail to set the base point, and then drag up and to the right of the original.
02:52
Click to place the new entity in the empty space resulting from moving the Index Finger.
02:57
Press ENTER to make the copy.
03:00
Switch back to the Raster Tools tab, and then on the REM panel, click Merge to Raster Image.
03:07
Select the copy of the entity, and then press ENTER to merge it back into the image.
03:13
Since the original entity was not changed, simply clear it.
03:18
You can either click Clear Selected, select the entity, and then press ENTER, or click Clear All.
03:24
While you could also use raster editing tools to perform similar edits,
03:29
the value of REM commands is that they can significantly reduce the number of editing steps.
03:35
After defining REM objects, you can use either AutoCAD commands
03:40
or AutoCAD Raster Design toolset commands to edit the objects in the same way as vector objects.
03:47
To illustrate this point, the next example modifies only a portion of a raster image using a primitive.
03:55
Because their dimensions can be changed, primitives are more intelligent than regions and enhanced bitonal regions.
04:03
On the REM panel, expand the Create Primitive drop-down and select Circle.
04:10
On the copy of the mandrel rib plate you just created, click the outer circle.
04:14
AutoCAD Raster Design creates a circle, which you can now modify using editing grips.
04:20
Click the circle, and then click a grip and drag to expand the circle.
04:26
Drag the opposite way to make it smaller than the original, and the underlying raster circle disappears, replaced by the smaller one.
04:34
On the REM panel, click Merge to Raster Image to merge the smaller circle into the image.
04:40
As you can see, raster entity manipulation, or REM allows you to modify specific raster data elements in ways similar to editing vector data.
04:50
The streamlined functionality of REM saves you steps and time when compared with standard raster editing tools.