Photoshop Code

This tag is associated with 2 posts
castle_emboss

Custom Image Filter Engine (in VB6)

May 5, 2009 ⋅ Post a comment

The ability to create custom filters is a mainstay of any quality graphics application. A robust matrix-based filter engine can be used to create tens – even hundreds – of unique image effects by simply manipulating the matrices that get passed into the engine. In this project, I’ve provided a 5×5 custom filter engine with support for both scaling and biasing. This is identical to the custom filter engine provided by Photoshop, and mine is even slightly faster (at least for the screen-sized images I’ve been testing)…

Believe it or not, this is a legitimate real-life application of calculus. Who would've thought it possible?

Real-time Image Curves (using cubic splines) in VB6

December 24, 2008 ⋅ Post a comment

By request, here is the first of its kind in VB: a fast, accurate, real-time image curves dialog. (This should be familiar to any PhotoShop users out there :) Curves is similar in theory both “Image Levels” post and standard gamma correction, but it provides a much more powerful interface for adjusting the luminance of an image. This project provides results very similar to Photoshop’s, and it allows the creation of more spline knots (32 instead of 16). The code is well-commented and very fast – please post comments, requests for future Photoshop-related code, and many heaps of praise (as this was a complicated routine to sort out…)!