photoshop | 易学教程

Convert RGB color to CMYK?

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I'm looking for an algorithm to convert an RGB color to CMYK. Photoshop is performing the conversion below: R = 220 G = 233 B = 174 C = 15 M = 0 Y = 40 K = 0 The conversion from RGB to CMYK is dependent on the physical device/process being used to lay down the CMYK ink. These are represented in software as Color Profiles. ICC and ICM color profiles of physical devices determine the resulting colors. If you are not concerned with true representation on a physical device then use the direct conversion formulas in other posts. If, however, you are concerned with this aspect, then you need to use

How to Fade In/Out multiple texts using CSS/jQuery like on Droplr?

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问题 I've seen this type of animation on a website just when CSS3 key-frames started to gain momentum, but couldn't find it nor could I replicate it using CSS or jQuery, and here's where I thought some of you could help. I've animated what I hope to achieve and I've embedded it below. I believe this can be coded using the new CSS3 key-frames or jQuery's .animate(); feature. I don't know. I've tried everything I know, but all in vain. Here's the GIF animation of what I wanted: I just noticed, http:

Reading PSD file format

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问题 I wonder if this is even possible. I have an application that adds a context menu when you right click a file. It all works fine but here is what I'd like to do: If the file is a PSD then I want the program to extract the image. Is this possible to do without having Photoshop installed? Basically I want the user to right click and click "image" which would save a .jpg of the file for them. edit: will be using c# Thanks 回答1: For people who are reading this now: the link from accepted answer

How does photoshop blend two images together? [closed]

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Can somebody please explain how Photoshop blends two images together so that I may reproduce the same effects in my application. Nathan Moinvaziri Photoshop blends two images together by performing a blend operation on each pixel in image A against its corresponding pixel in image B. Each pixel is a color consisting of multiple channels. Assuming we are working with RGB pixels, the channels in each pixel would be red, green and blue. To blend two pixels we blend their respective channels. The blend operation that occurs for each blend mode in Photoshop can be summed up in the following macros: