Image Processing

LEADTOOLS has over 200 image processing functions like transforms, fliters, color conversion, and drawing, some of which are typically found only in high performance end-user programs such as Adobe PhotoShop®. Many  functions support regions of interest (ROI), allowing only a particular region of an image to be processed. Image processing functions let you:

Change image size, orientation, and appearance:

• Define the bitmap as a display surface where you can use Windows graphics device interface (GDI) functions for drawing or adding text.

• Automatically straighten (deskew) a 1-bit image. See Transforms.

• Automatically straighten (deskew) bank checks.

• Automatically apply binary segmentation (auto-binarize), in order to convert color images to black-and-white while preserving text and improving recognition results

• Remove specks (despeckle) a 1-bit image.

• Automatically trim a bitmap to remove blank space around the edges.

• Rotate the image. (Angles can be precise to 100th of a degree.)

• Do fast rotation in 90-degree increments.

• Rotate JPEG or CMP compressed images in 90 degree increments or flip them without loss of quality.

• Shear the image in the fashion of a parallelogram. (Angles are precise to 100th of a degree.)

• Change the orientation by flipping the image horizontally or vertically.

Adjust colors and intensities:

• Change brightness using a flat scale.

• Change brightness using gamma correction.

• Change contrast using a flat scale.

• Change contrast using a multi-scale.

• Stretch the range of intensities.

• Remap intensities using a lookup table.

• Create look up tables based on points on a curve or a mathematical function.

• Invert colors.

• Change hue of the entire image or just a range of colors.

• Change saturation.

• Histogram equalize, histogram view and histogram contrast.

• Fill with a specified color.

• Get and put colors of individual pixels.

• Color balancing.

• Load CMYK TIFF files and keep the data in memory as CMYK.

Apply conversions:

• Halftone for display or printing.

• Sharpen or blur.

• Posterize, specifying the number of color planes.

• Mosaic, specifying the tile size.

• Emboss, specifying the lighting direction.

• Soften an image using an average filter.

• Reduce noise using a median or Gaussian filter.

• Add noise in any or all color planes.

• Picturize with a list of images or a single image.

Apply filters:

• Detect ranges of intensity.

• Detect ranges of colors using different color spaces.

• Detect edges using gradient or Laplacian edge detection.

• Detect lines using Sobel, Prewitt, shift and difference, or line segment detection.

• Apply morphological (binary) filters to erode or dilate black objects.

• Implement your own spatial filters.

• Combine images using boolean and arithmetic operators, and color masking. (This is useful for combining filtered images with originals.)

• Combine two images so that one appears to be an underlying texture of the other.

• Combine multiple images to create a new image that resembles the current image.

• Combine a list of images to find the average difference between the images.

• Redeye removal.

• Anti-alias the image.

• Apply a sepia or "old photo" look to the image.

• Apply an oil-painting effect.

• Apply a solarization effect.

• Apply Fourier Transforms to images.

• Apply 3D effects: Tunnel, plane, plane bend, etc.

• Apply many other effects including: Swirl, Ripple, Radial Blur, Impressionist, Wave, Shear, Remove Redeye, Cubism, Glow, Age, etc.

• Pass your own matrix to a binary filter.

Perform specialized medical imaging processing:

• Create Kaufmann regions. The created regions can be used to determine the Kaufmann ratio, which is the size of the corpus callosum divided by the size of the brain sphere.

• Extract the individual slices from a radiographic scanned film.

• Process extended grayscale image (10-16 bit signed and unsigned).

Apply image optimization:

• To an image buffer in memory

• To an entire directory of images, saving the optimized images to another directory

• Including file types:

• JPEG File (FILE_JPEG).

• JPEG 411 File (FILE_JPEG_411).

• JPEG 422 File (FILE_JPEG_422).

• EXIF JPEG 4:1:1 File (FILE_EXIF_JPEG_411).

• EXIF JPEG 4:2:2 File (FILE_EXIF_JPEG_422).

• GIF File (FILE_GIF).

• PNG File (FILE_PNG).

• BMP Without RLE Compression File (FILE_BMP).

• BMP With RLE Compression File (FILE_BMP_RLE).

Use low-level functions to change parts of an image:

• Get and put rows of image data.

• Get and put parts of rows.

• Get and put the colors of individual pixels.

• Process a region within a bitmap.

Supported Platforms

Image Processing C DLL

Image Processing ActiveX (OCX)

Image Processing C++ Class Library

Image Processing .NET and COM Interop