Tanner Helland (dot) Com» image levels http://www.tannerhelland.com Home of the award-winning author, VG composer, and programmer Fri, 13 Jan 2012 16:39:33 +0000 en hourly 1 Real-time Image Levels (input/output/midtone) in VB6 http://www.tannerhelland.com/341/image-levels-vb6/ http://www.tannerhelland.com/341/image-levels-vb6/#comments Wed, 24 Dec 2008 22:57:23 +0000 Tanner http://www.tannerhelland.com/?p=341 This is the first of its kind in VB: accurate, real-time image level adjustment. Image levels provide better control over an image’s luminance than strict brightness/contrast methods, but not quite as much control as a well-built image curves dialog. Adjusting an image with input/output/midtone levels is primarily designed to brighten or darken an image without losing detail at either end of the luminance spectrum. I’ve included simple histogram drawing code (as the screenshot shows) so you can see the effect that adjusting levels has on an image’s histogram. The code is well-commented and fast – please post comments and enjoy!

The included histogram code is also quite good.

The included histogram code is also quite good.

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