If this is your first visit, be sure to check out the FAQ by clicking the link above. You may have to register before you can post: click the register link above to proceed. To start viewing messages, select the forum that you want to visit from the selection below. |
|
|
Thread Tools | Display Modes |
#31
|
|||
|
|||
I'm looking for a book on Photoshop - 'Inside Photoshop".
In article , Eric Stevens
wrote: "Wikipedia does not have an article with this exact name. Please search for GreinerHormann clipping algorithm in Wikipedia to check for alternative titles or spellings." not only does wikipedia have articles for both of the above, but both links go directly to the respective pages. They do now for me, but they didn't several hours ago. user error. you did something wrong or your ****ty newsreader is once again not handling links correctly. in other words, user error. You ar very good at jumping to conclusions. no jump needed. nothing at wikipedia changed. the issue is entirely at your end. in addition to descriptions, wikipedia also lists several additional algorithms and other references: .... If you had read my original post you would know that I do not want algorithms. i did and you did. In article , Eric Stevens wrote: ...What I would like to know is what goes in inside Photoshop when I (for example) create a clipping mask. This doesn't mean that I want to know the actual code but I would like to know what the code is doing. what goes on inside photoshop, what the code is doing, *are* the algorithms. the code is merely instructions to execute a given algorithm. I want a description of the model which the various algorithms will be processing. that depends on the algorithms. as i said, it's a start, and now you know what to look for when searching for books or other materials. I neither need nor want to dig into the details of the algorithms. then why did you ask? |
#32
|
|||
|
|||
I'm looking for a book on Photoshop - 'Inside Photoshop".
On Mar 22, 2018, Eric Stevens wrote
(in ): I want a description of the model which the various algorithms will be processing. I neither need nor want to dig into the details of the algorithms. Just what on earth are you trying to do once you find all this stuff you are looking for? Is this your project to develop a kiwi-photo editor? -- Regards, Savageduck |
#33
|
|||
|
|||
I'm looking for a book on Photoshop - 'Inside Photoshop".
On Thu, 22 Mar 2018 19:44:34 -0400, "Mayayana"
wrote: "Eric Stevens" wrote | You said you want to know what the code | is doing. I gave you a brief outline of what the | code is doing. For any more you'd be getting | into the actual code. | | And the code is doing all this for what (slightly) higher level | purpose? | Maybe it's me, but I just don't get what level you want to investigate. And there are numerous levels of abstraction between the CPU and what you see in Photoshop. There's code. The code deals with bytes that represent pixels. (Did you see the extensive description from earlier today?) That's pretty much it, in terms of going up from code level. The next level up from bytes is basically the GUI, which allows you to process those groups of bytes with the mouse. If you do something like decide to lighten an image -- or just about any other operation -- it's all math. The byte values are raised to make for lighter pixel colors. There isn't any other step in between, except for the conveniences that allow us to just move the mouse and click buttons to do the job. So you perhaps drag a control to make the image lighter, the editor calculates how to increase the byte values to get the pixel colors that action specifies, then the editor paints the new image (A DIB, or stream of bytes representing the image) onto the screen. If you've enabled "auto proof" then it's painting new DIBs at a very fast rate, and probably storing one each time you release the mouse from the slide control. And perhaps most importantly, it stores the data from those steps in order to "remember" and offer multiple undo options. Each time you change the lightness, the editor will store a DIB that it can back up to if necessary. I'm sorry if that's not what you're looking for. I just don't know what else you can find out. That's how it works, soup to nuts. -- Regards, Eric Stevens |
#34
|
|||
|
|||
I'm looking for a book on Photoshop - 'Inside Photoshop".
On Thu, 22 Mar 2018 19:44:34 -0400, "Mayayana"
wrote: --- snip --- I'm sorry if that's not what you're looking for. I just don't know what else you can find out. It seemed clear enough to me when I wrote the original post but it's obvious I didn't make myself clear. Thinking about it, what I need is the equivalent of block diagrams with explanatory text. Sticking with my original example: what goes on inside PS when one creates a clipping mask? What graphic elements are used and how are they manipulated behind the scenes? -- Regards, Eric Stevens |
#35
|
|||
|
|||
I'm looking for a book on Photoshop - 'Inside Photoshop".
On 3/23/2018 5:38 PM, Eric Stevens wrote:
On Thu, 22 Mar 2018 19:44:34 -0400, "Mayayana" wrote: --- snip --- I'm sorry if that's not what you're looking for. I just don't know what else you can find out. It seemed clear enough to me when I wrote the original post but it's obvious I didn't make myself clear. Thinking about it, what I need is the equivalent of block diagrams with explanatory text. Sticking with my original example: what goes on inside PS when one creates a clipping mask? What graphic elements are used and how are they manipulated behind the scenes? It still sounds like you're looking for code examples to me. The only "graphic elements" are the bitmap array, as has already been stated by others. When the clipping mask is created, it is simply a path over the specified bitmap area that will be altered. If you want to know how the area is manipulated, you'll be looking at code algorithms. The actual answer to your question won't be simple like a block diagram and explanatory text. -- best regards, Neil |
#36
|
|||
|
|||
I'm looking for a book on Photoshop - 'Inside Photoshop".
In article , Eric Stevens
wrote: It seemed clear enough to me when I wrote the original post but it's obvious I didn't make myself clear. Thinking about it, what I need is the equivalent of block diagrams with explanatory text. Sticking with my original example: what goes on inside PS when one creates a clipping mask? What graphic elements are used and how are they manipulated behind the scenes? your questions were answered. |
#37
|
|||
|
|||
I'm looking for a book on Photoshop - 'Inside Photoshop".
On Mar 23, 2018, Eric Stevens wrote
(in ): On Thu, 22 Mar 2018 19:44:34 -0400, "Mayayana" wrote: --- snip --- I'm sorry if that's not what you're looking for. I just don't know what else you can find out. It seemed clear enough to me when I wrote the original post but it's obvious I didn't make myself clear. Thinking about it, what I need is the equivalent of block diagrams with explanatory text. Sticking with my original example: what goes on inside PS when one creates a clipping mask? What graphic elements are used and how are they manipulated behind the scenes? I still don’t get where you are going, or what sort of thought exercise you are entertaining with this search into the inner workings of PS. For that matter you might as well ask for the same information on Alienskin Exposure X3, On1 Photo Raw 2018, Affinity Photo, etc. After all they all follow similar principles when it comes to creating clipping masks, and other graphics editing staples. What are you trying to achieve other than a thought exercise? -- Regards, Savageduck |
#38
|
|||
|
|||
I'm looking for a book on Photoshop - 'Inside Photoshop".
On Thu, 22 Mar 2018 23:33:37 -0400, nospam
wrote: In article , Eric Stevens wrote: "Wikipedia does not have an article with this exact name. Please search for GreinerHormann clipping algorithm in Wikipedia to check for alternative titles or spellings." not only does wikipedia have articles for both of the above, but both links go directly to the respective pages. They do now for me, but they didn't several hours ago. user error. You love jumping to conclusions. Wikipedia is doing it again and https://www.dropbox.com/s/zxpbce5epy...pture.JPG?dl=0 is a screen clip of the message it displays. You can take your pick of possible explanations. you did something wrong or your ****ty newsreader is once again not handling links correctly. in other words, user error. You ar very good at jumping to conclusions. no jump needed. nothing at wikipedia changed. the issue is entirely at your end. in addition to descriptions, wikipedia also lists several additional algorithms and other references: ... If you had read my original post you would know that I do not want algorithms. i did and you did. Among other things I wrote "This doesn't mean that I want to know the actual code but I would like to know what the code is doing." I suppose you could that interpret that as a request for an algorithm but I actually intended reference to something higher up the chain than an algorithm. In article , Eric Stevens wrote: ...What I would like to know is what goes in inside Photoshop when I (for example) create a clipping mask. This doesn't mean that I want to know the actual code but I would like to know what the code is doing. what goes on inside photoshop, what the code is doing, *are* the algorithms. the code is merely instructions to execute a given algorithm. I want a description of the model which the various algorithms will be processing. that depends on the algorithms. You have it back to front: the algorithm depends upon the model. as i said, it's a start, and now you know what to look for when searching for books or other materials. I neither need nor want to dig into the details of the algorithms. then why did you ask? -- Regards, Eric Stevens |
#39
|
|||
|
|||
I'm looking for a book on Photoshop - 'Inside Photoshop".
On Thu, 22 Mar 2018 20:44:45 -0700, Savageduck
wrote: On Mar 22, 2018, Eric Stevens wrote (in ): I want a description of the model which the various algorithms will be processing. I neither need nor want to dig into the details of the algorithms. Just what on earth are you trying to do once you find all this stuff you are looking for? Is this your project to develop a kiwi-photo editor? It's the way I think. I like to know how things are actually working. -- Regards, Eric Stevens |
#40
|
|||
|
|||
I'm looking for a book on Photoshop - 'Inside Photoshop".
"Savageduck" wrote
| What are you trying to achieve other than a thought exercise? | It sounds like he just wants to grasp the gist of it. That makes sense to me. I have trouble dealing with things if I can't understand them, though I know many people don't have any such need. But we seem to be having trouble figuring out how to talk about it. My guess is that Eric is making one or more assumptions that I'm not aware of and can't guess. I think that's not surprising. Computers work in a way that's really not analogous to anything else. And these days the superficial level is so far removed from the level of basic operation that it's not easy to connect them. |
Thread Tools | |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
[review] "The Adobe Photoshop CS4 Book for Digital Photographers"by Scott Kelby | Troy Piggins[_32_] | Digital SLR Cameras | 27 | December 15th 09 07:50 PM |
[review] "The Adobe Photoshop CS4 Book for Digital Photographers" by Scott Kelby | Phred | Digital Photography | 4 | November 24th 09 06:02 PM |
Photoshop book recommendations | Tim | Digital Photography | 10 | December 17th 06 08:47 PM |
Photoshop Plugins Collection, updated 25/Jan/2006, ADOBE CREATIVE SUITE V2, PHOTOSHOP CS V2, PHOTOSHOP CS V8.0, 2nd edition | [email protected] | Digital Photography | 0 | February 2nd 06 07:54 AM |
Photoshop CS book? | Anonymous | Digital Photography | 26 | December 16th 04 12:21 AM |