gamma

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Gamma-curve experiment -- convert 2.2 to opposite of 1.8?

The Motorola Photon is infamous for exhibiting what others have called \"black crush\" -- when viewing pictures, most of the detail in dark parts of the image is flattened out to black. Up to now, pre[详细]

2023-04-10 01:33 分类：问答
Apply a Gamma of 1.8 to an NSImage

I\'m trying to convert an NSImage to have a a gamma of 1.8 and I\'m not having much luck. I\'ve found some code but nothing that\'s working. I开发者_开发知识库\'ve got a method that returns an NSBitma[详细]

2023-03-21 05:56 分类：问答
(DirectX9) sRGB conversion after blending

I recently came across this blog post Yet another post about gamma correction which taught me the availability of the D3DPMISCCAPS_POSTBLENDSRGBCONVERT capability flag.[详细]

2023-03-16 03:54 分类：问答
What is the name of a algorithm implemented in gamma_curve of dcraw?

Dcraw contains a following algorithm to process image colors: https://gist.github.com/1047302. Is it a formal (named) image processing algorithm?[详细]

2023-03-15 05:45 分类：问答
Color spaces, gamma and image enhancement

Color space. Well, everybody knows about RGB: three values normalized in the range [0.0,1.0], which have the meaning of the intensity of the color components Red Green Blue; this intensity is meant as[详细]

2023-03-13 17:53 分类：问答
Does anything special need to be done to linear-intensity images before displaying them on a DICOM calibrated display?

I have some code which renders RGB images from a physical simulation.Those images have a linear intensity scale, so must be gamma corrected before display on a normal PC monitor and it\'s easy enough[详细]

2023-02-11 15:47 分类：问答
PHP GD2: how to maintain alpha channel transparency and correct gamma

I was intrigued by this discussion of image scaling and subsequently found out that the PHP code I\'m using to create thumbnails from uploaded images suffers from the same problem. I decided to try th[详细]

2023-01-08 20:28 分类：问答
How to calibrate a Mac Monitor for iPhone development

How to calibrate a Mac monitor to m开发者_JAVA技巧atch the iPhone\'s colours? What is the iPhone\'s gamma?[详细]

2022-12-31 23:42 分类：问答
How can I get image data from QTKit without color or gamma correction in Snow Leopard?

Since Snow Leopard, QTKit is now returning color corrected image data from functions like QTMovies frameImageAtTime:withAttributes:error:.Given an uncompressed AVI file, the same image data is display[详细]

2022-12-16 00:22 分类：问答
How to scale pixels in an image to adjust brightness?

I have a grayscale image from a photograph.I\'ve determined that certain parts of the image are underilluminated, and that a pixel with luminance Y = 0.8 should actually be adjusted to 90% grey, i.e.,[详细]

2022-12-14 13:09 分类：问答