In this example, we will remove the green band from an RGB raster. The original raster has three bands - red, green, and blue - and no palettes. Note the band index numbers, starting with zero (0). Green is Band 1.

该操作将采用三个步骤（虽然第三步是可选的）：

1. 选择要删除的频带。
2. Remove the selected band.
3. 执行另一个光栅选择，重新选择剩余的频带以进行进一步处理（可选）。

The raster is first routed into a RasterSelector. In the parameters dialog,年代election Mode是乐队和调色板列表。

The乐队和调色板列表是set to1, which will select the green band (Band 1) only.

Next, the raster passes through aRasterBandremover.。This transformer has no parameters to set, and removes all currently selected bands.

After exiting the RasterBandRemover, the raster feature has no bands selected, as the previously selected band no longer exists. Selection does not generally affect writers, but if further processing is required, the remaining bands need to be re-selected.

另外添加了另一个rasterselector，而且乐队和调色板列表是set toALL，选择所有频段。

输出栅格功能只有两个频段 - 红色和蓝色。请注意，频带索引编号已复位 - 频段1现在是蓝色的。

In this example, we will select a palette to be extracted into an attribute, using arasterpaletteextractor.transformer. The source raster has one band, with two palettes - an RGB palette containing colors, and a string palette that contains labels. We are interested in the string palette.

请注意，唯一的频带是带0，字符串调色板是调色板1。

This operation will take two steps:

1. 选择感兴趣的调色板，它正在打开乐队。
2. Perform the extraction.

The raster is first routed into a RasterSelector. In the parameters dialog,年代election Mode是乐队和调色板列表。

The乐队和调色板列表是set to0 1, representing Band 0 and Palette 1, separated by a space.

The next step is therasterpaletteextractor.。在“参数”对话框中，我们为新属性设置一个名称，该属性将包含所选选项板的内容，命名它_palette。

输出栅格功能具有一个新的属性，具有选定调色板的内容。

请注意，栅格功能的状态退出RasterPaletteextractor仍然是一个频段，选择一个调色板。如果需要进一步处理，则可能需要另一个乘法器来重新选择所有频带和调色板，如前面的示例所示。

A乐队和调色板列表of所有的所有将重新选择所有乐队和调色板。

与罗斯特合作

These transformers generally apply to whole rasters.

RasterCelloriginsetter.	年代ets the cell origin point within cells in a raster.
RasterConvolver	应用卷积滤波器（有时称为akernelor镜片) to raster features and outputs the results.
RasterExpressionEvaluator	Evaluates expressions on each cell in a raster or pair of rasters, including algebraic operations and conditional statements.
RASTEREXTENTSCOERCER.	用多边形替换输入栅格功能的几何图形，覆盖光栅范围的范围或栅格内的数据范围。
Rastergcpextractor.	ExtractsGround Control Point（GCP）来自栅格功能的坐标系和点值，并将其视为属性。
RasterGCPSetter	年代ets地面控制点（GCPS）在光栅上，用已知坐标配对单元位置。
RasterGeoreferencer	Georeferences a raster by either known corner coordinates or origin, cell size, and rotation.
RasterHillshader	基于高程值，生成地形的灰度阴影浮雕表示。
RasterInterpretationCoercer.	改变了栅格的解释类型，包括所有频段，并在必要时转换单元值。
RasterMosaicker	Merges multiple raster features into a single raster feature.
Rasterpropertyextractor.	提取栅格功能的几何属性并将其视为属性。
RasterPyramider	Resamples rasters to multiple resolutions, based on either number of levels or dimensions of the smallest output raster.
RasterRegisterer.	Transforms an image to minimize its difference with another.
RasterResampler	基于指定的输出尺寸，地面单位的单元格大小或原始的百分比，并对新的单元格值进行resples。
RasterRotationApplier	Rotates a raster feature according to its rotation angle property, interpolating new cell values, updating all other affected raster properties, and producing an output raster feature with a rotation angle of zero.
RasterSharpener	增强光栅图像的特征。Rastersharpener增强边界，线条和曲线，同时降低光栅图像的平坦区域中的噪音。
RasterSubsetter	使用像素绑定而不是地坐标的剪辑栅格功能，并且可选地在周边围绕周边添加单元格。
RasterTiler	通过指定单元/像素或瓷砖数量的图块大小将每个输入栅格分成一系列差块。
范特利奥戈翁塞纳克	从输入栅格功能创建多边形。为每个连续区域的像素区域输出一个多边形，在输入栅格中具有相同的值。
WebMapTiler	创建一系列可通过Web映射应用程序使用的图像块，例如Bing™Maps，Google Maps™或Web地图图块服务。这是通过重新采样仪器来完成各种不同分辨率的，然后将它们拆分为瓷砖。

与乐队一起使用

These transformers generally apply to bands.

RasterBandAdder	Adds a new band to a raster feature.
RasterBandCombiner.	Merges coincidental raster features into a single output raster feature, preserving and appending all bands.
RasterBandInterpretationCoercer.	改变单个光栅带的解释类型，如有必要，转换单元值。
RasterBandKeeper	从栅格功能中删除所有未选择的频带。
Rasterbandminmaxxtractor.	从栅格功能中提取最小和最大频带值，调色板键和调色板值，并将它们添加到列表属性。
RasterBandNameSetter	年代ets the band name of selected bands on a raster, making raster contents simpler to understand compared to band numbers.
RasterbandNodataremover	从栅格功能的选定频段中删除现有的Nodata标识符。先前等于Nodata值的任何值都被视为有效数据。
RasterBandNodataSetter	在栅格功能的所选频段上设置新的Nodata值。
RasterBandOrderer	年代pecifies the required order of bands in a raster. Bands are reordered according to the input band indices.
RasterBandPropertyExtractor	提取栅格功能的频带和调色板属性并将其作为属性暴露。
RasterBandremover.	从栅格功能中删除任何选定的频段。
RasterBandSeparator	将频带或唯一频带和调色板组合分开，并输出单个栅格功能或包含所有组合的单个新栅格功能。
rastertatisticscalculator.	Calculates statistics on raster bands and adds the results as attributes.

Working with Cells

These transformers generally apply to individual cells.

RasterSpectCalculator.	计算光栅的每个单元的方面（斜率方向）。方面以从北方顺时针的0到360测量。
RasterCellCoercer	Creates individual points or polygons for each cell in a raster, optionally extracting band values as z coordinates or attributes.
RasterCellValueCalculator	Evaluates basic arithmetic , minimum, maximum or average operations on the cell values of a pair of rasters.
Rastercellvaluerepler.	用新的单个值替换栅格中的一系列频带值。
rastercellvaluerounder.	Rounds off raster cell values.
RasterSegmenter	基于输入光栅图像单元中的强度差，将光栅图像分配到从输入图像中的任意大小的小区组。
rastersingularcellvaluecalculator	对栅格的小区值对数值执行基本算术运算。
RasterSlopeCalculator	Calculates the slope (maximum rate of change in z) for each cell of a raster.

与调色板合作

这些变压器通常适用于调色板。

梁栅栏	从属性中创建一个调色板，并将此调色板添加到栅格上的所有选定频段。
rasterpaletteextractor.	Creates a string representation of an existing palette on a raster and saves it to an attribute.
RasterPaletteGenerator	从光栅的选定频段中生成调色板。输出栅格将使所选频段由带有调色板的新频段替换。
RasterPaletteInterpretationCoercer	Alters the interpretation type of raster palettes.
Rasterpalettenodatasetter.	Identifies the palette key that matches a raster band’s nodata value, and sets a value on it.
Rasterpaletteremover	Removes selected palette(s) from raster features.
RasterPaletteResolver	通过用相应的调色板值替换单元值来解析栅格上的调色板。具有多个组件（如RGB）的调色板值被分解，并且分配给多个新添加频段的单个值。

亚搏在线工作流控制

这些变压器通常控制工作空间中的功能流。

RasterCheckpointer	强制累计覆盖栅格操作要处理，将状态保存到磁盘并释放资源以调整性能或协助内存限制。
RasterConsumer	读取用于测试目的的栅格功能，包括任何累计光栅操作。没有执行额外的操作，没有任何内容功能。
rasterextractor	年代erializes the geometry of a raster feature into a Blob attribute, encoding the contents according to a choice of common binary raster formats.
RasterNumericCreator	创建指定大小和分辨率的数字栅格，具有默认单元格值。
RasterReplacer	Decodes a binary attribute containing encoded rasters stored as Blobs, replacing the feature’s geometry with the decoded raster.
RasterRGBCreator.	创建指定大小，分辨率和解释类型的颜色栅格功能，具有默认单元格值。
RasterSelector	为后续变压器操作选择栅格的特定频带和调色板。

矢量和栅格

These transformers generally involve using rasters and vector data together.

ImageRasterizer	Creates a raster representation of vector or point cloud input features, using the fme_color attribute over a solid background fill for vector features. Point clouds may be rendered using their color or intensity components.
NumericRasterizer.	Creates a numeric raster representation of vector or point cloud input features, where cell values are taken from the z coordinates of the input features and overlaid on a uniform background.
MapnikRasterizer	从输入向量和光栅功能生成光栅，使用MapNik Toolkit对符号化和标签进行精细控制。
PointonRasterValueExtractor.	Extracts the band and palette values from a raster at the location of one or more input points and sets them as attributes on the feature.
RasterDemgenerator.	Produces a raster digital elevation model (DEM) by uniformly sampling a Delaunay triangulation generated from input points and breaklines.
VectorOnRasterOverlayer	Rasterizes vector or point cloud features onto an existing raster. For vector features the fme_color attribute sets pixel color, and point clouds may be rendered using their color or intensity components.

此变形器仅接受栅格功能。

If a specific band or palette number is specified in the乐队和调色板列表parameter, that band or palette must exist on the input feature. If the specified band or palette number does not exist, an error will occur.

Raster features with specified bands and palettes in a selected state.

Non-raster features will be routed to the port, as well as invalid rasters.

Rejected features will have an fme_rejection_code attribute with one of the following values:

Invalid_geometry_type.
INVALID_RASTER_NO_BANDS

拒绝功能处理：可以设置为终止翻译或在遇到被拒绝的功能时继续运行。此设置可用作默认设置FME option和A.工作区参数。