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 |
#1
|
|||
|
|||
I'm looking for a book on Photoshop - 'Inside Photoshop".
I'm looking for a book about the workings of Photoshop CC. I don't
know what it is called, in fact I don't even know if it exists, but if it does exist it might be called something like 'Inside Photoshop'. I'm not interested in learning how edit photographs (for beginners), I'm not interested in learning how use the various tools nor am I interested in learning how to push their various buttons. 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. Is there such a book? Does anyone know? -- Regards, Eric Stevens |
#2
|
|||
|
|||
I'm looking for a book on Photoshop - 'Inside Photoshop".
In article , Eric Stevens
wrote: I'm looking for a book about the workings of Photoshop CC. I don't know what it is called, in fact I don't even know if it exists, but if it does exist it might be called something like 'Inside Photoshop'. I'm not interested in learning how edit photographs (for beginners), I'm not interested in learning how use the various tools nor am I interested in learning how to push their various buttons. 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. you want a book on image processing, although it's rather obvious how it works. Is there such a book? Does anyone know? many of them. |
#3
|
|||
|
|||
I'm looking for a book on Photoshop - 'Inside Photoshop".
"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. | | Is there such a book? Does anyone know? I'm not sure I understand what you're asking, but it sounds like what you want to know about is graphics programming. You might be able to find books, but unless you're writing code there's not much call for such a thing. In other words, some people want to know how to select an area. Some people want to know how to write software that allows for selecting an area. But few people want to know how to do that without having any plan to do it. In brief, if you're dealing with raster images it's all about the bitmap. The image, once loaded, is what's known as a device-independent bitmap. A DIB. Which is an array of byte values that represent a grid of pixel color values. The original image is one DIB. The mask is another DIB. From there it's just math, differentiating the pixels in the first DIB that coincide with the mask from the pixels that are outside the mask. So for instance if you mask a circular area and then want to copy that to a white background, the copying routine will calculate which pixels are within the circle and copy only those. It's all math. For example, resizing works by comparing pixels in the vicinity of a given pixel in order to guess the best color value for new filler pixels. There are various methods for doing that. Bilinear resampling will compare the 4 nearest pixels to choose a color for added pixels when enlarging. Bicubic will compare the 16 nearest pixels, taking more time but resulting in a better quality image. Sharpening works by finding differences and increasing them.... Lightening works by increasing the RGB pixel values.... These days it gets almost magical, with the ability to do things like remove an object from an image and auto-fill that background convincingly. But it's all still just math working with pixel grids. By comparison with things like "intelligent" fill or high quality resampling, a mask is grunt work. |
#4
|
|||
|
|||
I'm looking for a book on Photoshop - 'Inside Photoshop".
In article , Mayayana
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. | | Is there such a book? Does anyone know? I'm not sure I understand what you're asking, then you shouldn't answer. The original image is one DIB. except when it's written for something other than windows. The mask is another DIB. except when it's a path, especially one that overlaps. From there it's just math, differentiating the pixels in the first DIB that coincide with the mask from the pixels that are outside the mask. So for instance if you mask a circular area and then want to copy that to a white background, the copying routine will calculate which pixels are within the circle and copy only those. it's a *lot* more complicated than that. It's all math. For example, resizing works by comparing pixels in the vicinity of a given pixel in order to guess the best color value for new filler pixels. There are various methods for doing that. Bilinear resampling will compare the 4 nearest pixels to choose a color for added pixels when enlarging. Bicubic will compare the 16 nearest pixels, taking more time but resulting in a better quality image. Sharpening works by finding differences and increasing them.... Lightening works by increasing the RGB pixel values.... that's *very* simplified and not entirely correct. for example, lightening doesn't work in rgb space and is a lot more advanced than simply 'increasing the values' so as to not blow out highlights. photoshop's healing brush uses partial differential equations. These days it gets almost magical, with the ability to do things like remove an object from an image and auto-fill that background convincingly. But it's all still just math working with pixel grids. it's more than just math. there's now a lot of machine learning involved. |
#5
|
|||
|
|||
I'm looking for a book on Photoshop - 'Inside Photoshop".
On Wed, 21 Mar 2018 21:09:47 -0400, nospam
wrote: In article , Eric Stevens wrote: I'm looking for a book about the workings of Photoshop CC. I don't know what it is called, in fact I don't even know if it exists, but if it does exist it might be called something like 'Inside Photoshop'. I'm not interested in learning how edit photographs (for beginners), I'm not interested in learning how use the various tools nor am I interested in learning how to push their various buttons. 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. you want a book on image processing, although it's rather obvious how it works. Rather obvious? OK then, you tell me what goes on when PS creates a clipping mask. I don't need to know what it does (I already know that), I don't want to know how to create a clipping mask (I already know), I don't want to be told about the indented layer names, down arrow and layer name underlining. What I want to know is when I create a clipping what is it that goes on in PS with the basic entities that PS uses to manipulate images. I bet you can't. Is there such a book? Does anyone know? many of them. How about a few names. -- Regards, Eric Stevens |
#6
|
|||
|
|||
I'm looking for a book on Photoshop - 'Inside Photoshop".
On Wed, 21 Mar 2018 22:16:45 -0400, "Mayayana"
wrote: "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. | | Is there such a book? Does anyone know? I'm not sure I understand what you're asking, but it sounds like what you want to know about is graphics programming. You might be able to find books, but unless you're writing code there's not much call for such a thing. In other words, some people want to know how to select an area. Some people want to know how to write software that allows for selecting an area. But few people want to know how to do that without having any plan to do it. In brief, if you're dealing with raster images it's all about the bitmap. The image, once loaded, is what's known as a device-independent bitmap. A DIB. Which is an array of byte values that represent a grid of pixel color values. The original image is one DIB. The mask is another DIB. From there it's just math, differentiating the pixels in the first DIB that coincide with the mask from the pixels that are outside the mask. So for instance if you mask a circular area and then want to copy that to a white background, the copying routine will calculate which pixels are within the circle and copy only those. It's all math. For example, resizing works by comparing pixels in the vicinity of a given pixel in order to guess the best color value for new filler pixels. There are various methods for doing that. Bilinear resampling will compare the 4 nearest pixels to choose a color for added pixels when enlarging. Bicubic will compare the 16 nearest pixels, taking more time but resulting in a better quality image. Sharpening works by finding differences and increasing them.... Lightening works by increasing the RGB pixel values.... These days it gets almost magical, with the ability to do things like remove an object from an image and auto-fill that background convincingly. But it's all still just math working with pixel grids. By comparison with things like "intelligent" fill or high quality resampling, a mask is grunt work. Well - yes. But I know that already. -- Regards, Eric Stevens |
#7
|
|||
|
|||
I'm looking for a book on Photoshop - 'Inside Photoshop".
In article , Eric Stevens
wrote: I'm looking for a book about the workings of Photoshop CC. I don't know what it is called, in fact I don't even know if it exists, but if it does exist it might be called something like 'Inside Photoshop'. I'm not interested in learning how edit photographs (for beginners), I'm not interested in learning how use the various tools nor am I interested in learning how to push their various buttons. 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. you want a book on image processing, although it's rather obvious how it works. Rather obvious? in general yes, although the exact algorithms aren't. OK then, you tell me what goes on when PS creates a clipping mask. I don't need to know what it does (I already know that), I don't want to know how to create a clipping mask (I already know), I don't want to be told about the indented layer names, down arrow and layer name underlining. What I want to know is when I create a clipping what is it that goes on in PS with the basic entities that PS uses to manipulate images. I bet you can't. you'd be wrong. Is there such a book? Does anyone know? many of them. How about a few names. start he https://en.wikipedia.org/wiki/Sutherland*Hodgman_algorithm https://en.wikipedia.org/wiki/Greiner*Hormann_clipping_algorithm |
#8
|
|||
|
|||
I'm looking for a book on Photoshop - 'Inside Photoshop".
"Eric Stevens" wrote
| Well - yes. But I know that already. OK. So if you know how to use a clipping mask, and you understand how the actual graphic operations work behind the scenes, then what is it that you think you don't know? I don't understand. 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. |
#9
|
|||
|
|||
I'm looking for a book on Photoshop - 'Inside Photoshop".
"nospam" wrote
| The original image is one DIB. | | except when it's written for something other than windows. | Woops. Sorry. I should have mentioned that on a Mac, raster images are actually composed of 2 parts unicorn and 1 part butterflies. |
#10
|
|||
|
|||
I'm looking for a book on Photoshop - 'Inside Photoshop".
In article , Mayayana
wrote: I don't understand. yep. 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. nope. |
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 06:50 PM |
[review] "The Adobe Photoshop CS4 Book for Digital Photographers" by Scott Kelby | Phred | Digital Photography | 4 | November 24th 09 05:02 PM |
Photoshop book recommendations | Tim | Digital Photography | 10 | December 17th 06 07:47 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 06:54 AM |
Photoshop CS book? | Anonymous | Digital Photography | 26 | December 15th 04 11:21 PM |