Image Filter Tester 1.1 - Generic Pixel Transfer Filter

• This filter transforms an image using 3 user-defined functions.

  • The first two functions (called X/Y-Coordinate Transfer Functions) define how the pixel coordinates of the new image are mapped to the pixel coordinates of the original image. These two functions are functions of pixel coordinates.

  • The third function (called Pixel Value Transfer Function) calculates the pixel values of the new image. This function is a function of pixel coordinates and pixel value.

• This filter is particularly useful for creating special effects including illumination effects, geometric effects, and reflection effects.
• The built-in function parser accepts any function typed in C-style. It recognizes 13 operators, 44 function names, 2 constants plus unlimited number of independent variables. Please click here for a complete list.

• While you type your transfer functions, please use 'x0' and 'x1' to represent pixel coordinates, and 'x2' to represent pixel value. The parser is NOT case-sensitive. The origin of pixel coordinates is the top-left corner of the image.

• The default pixel value is used when the pixel coordinates of the new image are mapped to the pixel coordinates outside the original image.

• This filter works for grayscale images or 24-bit color images.

This page was last modified on 02/29/2004.