GetHeight Method (PixelBlock)
Gets the height (number of rows) of this pixel block in pixels.
This method must be called on the MCT. Use QueuedTask.Run.
Public Function GetHeight() As Integer
Return Value
An integer representing the height of this pixel block in pixels.
Process pixels using a pixel block
await QueuedTask.Run(() =>
{
// Read pixel values from the raster dataset into the pixel block starting from the given top left corner.
raster.Read(0, 0, currentPixelBlock);
// For each plane (band) in the pixel block
for (int plane = 0; plane < currentPixelBlock.GetPlaneCount(); plane++)
{
// Get a copy of the array of pixels from the pixel block corresponding to the current plane.
Array sourcePixels = currentPixelBlock.GetPixelData(plane, true);
// Get the height and width of the pixel block.
int pBHeight = currentPixelBlock.GetHeight();
int pBWidth = currentPixelBlock.GetWidth();
// Iterate through the pixels in the array.
for (int i = 0; i < pBHeight; i++)
{
for (int j = 0; j < pBWidth; j++)
{
// Get the NoData mask value to see if the pixel is a valid pixel.
if (Convert.ToByte(currentPixelBlock.GetNoDataMaskValue(plane, j, i)) == 1)
{
// Get the pixel value from the array and process it (add 5 to the value).
// Note: This is assuming the pixel type is Unisigned 8bit.
int pixelValue = Convert.ToInt16(sourcePixels.GetValue(j, i)) + 5;
// Make sure the pixel value does not go above the range of the pixel type.
pixelValue = pixelValue > 254 ? 254 : pixelValue;
// Set the new pixel value to the array.
// Note: This is assuming the pixel type is Unisigned 8bit.
sourcePixels.SetValue(Convert.ToByte(pixelValue), j, i);
}
}
}
// Set the modified array of pixels back to the pixel block.
currentPixelBlock.SetPixelData(plane, sourcePixels);
}
// Write the pixel block to the raster dataset starting from the given top left corner.
raster.Write(0, 0, currentPixelBlock);
});
Target Platforms: Windows 11, Windows 10
ArcGIS Pro version: 3 or higher.