PiXCL Core Image Processing Functions

All versions of PiXCL support the following 8 and 24 bit per pixel image file formats for read and write, unless otherwise specified.

• BMP: Windows bitmap
  

• JPEG, JIFF: JPEG compliant
  
• PCD: Kodak Photo-CD (read-only, all modes)
  
• PCX: Zsoft Paintbrush
  
• PPM: Portable Pixel Map (binary mode only)
  
• PNG: Portable Network Graphics
  
• PSD: Photoshop v4.0 (no layers)
  
• RAS: Sun Raster files (Type 1)
  
• RLE: Windows run-length encoded
  
• TIFF and geoTIFF (display) : Sub-formats include compressed (except LZW) and Group 3, 4 fax.
  
• TGA : Targa bitmaps
  
• RAW: 8/16/24/32 bit, planar or interleaved, big or little-endian.

All versions of PiXCL include a DLL that provides the following image processing functions, listed alphabetically below.

• AddNoise : adds a percentage of random noise to an image.
  

• AverageImage : apply a pixel averaging function.
  
• BlurImage : blur the image an arbitrary amount.
  
• CropImage : resize image by selecting a sub-region.
  
• CombineChannels : produce a color composite from a set of loaded image channels
  
• ConvertColorSpace : convert a loaded image between various colorspace models.
  
• DespeckleImage : attempt to remove a percentage of noise pixels from an image.
  
• DuplicateImage : make a copy of the image in the PiXCL image list.
  
• EnlargeImage : make the current image larger, with centering options.
  
• EdgeDetectImage : detect and enhance hi-frequency edge pixels.
  
• EqualizeImage : perform a histogram equalization on the image.
  
• EmbossImage : produce an embossing effect.
  
• FilterImage5x : apply a user defined 5x5 filter over the image.
  
• FilterImage15x : apply a user defined 15x15 image over the image.
  
• FlipImage : flip the image vertically or horizontally.
  
• GammaCorrectImage : adjust the gamma of an image.
  
• GaussianBlurImage : apply a gaussian function to blur the image.
  
• GetChannel : get the RGB bitmap handles of a loaded image.
  
• Histogram : display a cumulative or non-cumulative histogram of an image. Related commands are UpdateHistogram, ReportHistogramStats and ShowHistogram to create an ASCII histogram file.
  
• InvertImage : invert the colors of an image. Also known as NegativeImage.
  
• LinearEnhanceImage : perform a linear enhancement to a selected mean and standard deviation.
  
• NLEnhanceImage : perform logarithmic, exponential or power function non-linear enhancement.
  
• NormalizeImage : perform a histogram normalization on the image.
  
• NormalizeImageRange : perform a histogram normalization within a range of values in the image.
  
• RemapImage: import an RGB color array to perform non-linear enhancements or fast classification. Related command: CreatePALfile generates a pallette file imported by RemapImage.
  
• ReplaceChannel : replace and R, G or B channel in a colcor composite.
  
• ResampleImage : adjust the size of an image using Nearest Neighbour, BiLinear or BiCubic interpolation.
  
• ResizeImage : adjust the size of an image using pixel replication or skipping.
  
• RotateImage : rotate an image an arbitrary angle about the center pixel.
  
• RotateImageExt : rotate an image an arbitrary angle about a defined pixel, using Nearest Neighbour, BiLinear or BiCubic interpolation.
  
• ScatterPixels : displace pixels an arbitrary amount.
  
• SharpenImage : apply an image sharpen function.
  
• SkewImage : vertically or horizontally skew the image to an arbitrary degree.
  
• TuneImage : adjust the brightness and contrast of an image.

PiXCL Advanced Image Processing Functions

This set of extension DLLs provide functions and commands for performing

• Multispectral signatures from training areas, parallelipiped (PPD) and maximum likelyhood (MLH) classification. Regions of interest in a your image are extracted into training area files (ASCII format) and the spectral signature values computed and stored in additional ASCII files. These files are imported into the MLH and PCA functions. The classification process generates a colour overlay image in memory which can be saved to disk when required. Classification is used to identify similar pixels in up to 8 spectral input bands. Common uses are three channel classification in brightfield or darkfield microscopy.

• principal components (PCA) from signatures, including "inverse" Decorrelation Stretch and Martin-Talyor Mapping operations. The PCA operations are a statistical colour space conversion process, and requires two passes. The first generates the correction parameters, based on the signature covariance matrix, and the second pass performs the actual conversion to the PCA colour space. The result is blue-yellow, red-green image when a 24-bit colour composite is created later. This is not the same as a RGB-IHS/VHS conversion, as these process are purely a fixed conversion and makes no assumptions about the input channel data space.

• Brovey Transform for merging high resolution imagery with lower resolution imagery.

• Blob identification and measurement, and morphological operations. Operations include creating a blob menasurement environment, identifying 4-connected blob regions in the image and filtering the blobs to remove small areas. Visual commands draw the blob outlines and identifiers into an overlay bitmap. Blob data and statistics can be exported to ASCII files, or directly to a MS-Excel spreadsheet.

The price for PiXCL 8 End-User is C$50.

The price for PiXCL 8 Developer is C$150.

Delivery is by download from my website. If you really require a CD, a small extra charge plus shipping is required.

I also accept certified cheques, and will provide product once cleared at my bank.

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