|
||
26 The program runs slow on my older computer? If you only use standard text and you turn autoproof off, (We must compare apples to apples.) PSP 7 text tested to be the same as PSP 6 text in rendering time. To turn off autoproof: Click on the Arrow in the text dialog box so it is no longer depressed. Now if you use some outlines, and/or gradients and patterns in text, this will add a bit of time, but not so much as creating the text, converting it to raster and then applying a stroke or gradient. The largest time hog in the text tool is the autoproof button. Deselecting that makes it more usable on the lower end machines. -Nancy |
Hot Tip |
28 Pressing Reset restores the default values in the PSP filters, but Shift-Reset restores the values to what the filter used last. This helps you process a series of images the same way. |
29 I noticed that adjusting the midtones setting in the new Histogram Adjustment dialog box also effects the color saturation. Entering a positive number increases the saturation and negative numbers decrease the saturation. A setting of Midtones -15 seems to give a pretty noticeable saturation decrease in the image I was using. At first I thought this might just be a natural result of the change in contrast, but then I tried a further test: instead of applying a Midtones -15 adjustment to the luminosity channel, I applied the same -15 adjustment separately to each of the RGB channels. In this case there was no apparent change in saturation. So I concluded that this must be a bug. -Jon First, Luminosity is made up of different proportions of red, green and blue. In math terms: Luminosity = a x R + b x G + c x B The important thing is that the factors a, b and c are not the same. In fact (no pun) the biggest one of the three is b. In other words, the green channel is most important for our sense of contrast. This is because the human eye is most sensitive to green. What does this mean? If you change R and G and B all by the same amount - lets call it X percent - then this is not the same as changing Luminosity by X percent. (Why? Because changing luminosity by X percent means changing R by aX percent, G by bX percent and B by cX percent, and aX does not equal bX does not equal cX.) Second, there is the possibility of a mistake on your part. The Histogram Adjustment filter can change Luminosity, R, G or B one at a time. It cannot change two or more of these simultaneously. For example, if you first adjust the Green channel and, without exiting from the filter, you select say the Red channel, the changes to the Green channel are discarded and the filter applies changes only to the R channel. If you ran the filter three times with a setting of Midtones -15, first for the Red channel (clicking OK), then (reinvoking again) for the Green, and finally for the Blue, you did what you described in your message. If you did not run the filter 3 times, you did not perform the comparison discussed in the previous paragraph, even though you believe you did. The automatic photo correction tools do, in fact, use principles from human color vision to do their job. You could say that in some way they are "smarter" than the Histogram Adjustment filter. If you use the HSL color space in PSP to estimate hue, saturation & lightness you will find these are grossly at variance with human perception. HSL is there because it is a traditional color space in which color hues are easy to define, not because it mimics how humans see. If you correct an image in the sequence: color balance, then contrast, then saturation you will normally get the best results. Only when the image is improperly almost black or almost white does it pay to do contrast first, & even then the best sequence is probably: contrast,then color balance, then contrast again & then saturation. I hope this helps. -Kris
|
30 I want a transparent paint brush? On a normal layer the eraser is equivalent to painting with transparency |
31 Speaking of cats and red-eye, I wish there were a built-in cat-pupil-shaped pupil for red-eye removal. To get a cat's eye looking like a cat's eye, you have to do the pupil selection by hand. Not a horrible problem, but I have lots of pictures of cats, and so would find something automated to be handy. -Lori There is a built-in cat-pupil-shaped pupil - ta da! When you use the Auto Animal Eye method you initially get a circular selection. (You do this either by clicking on the eye or dragging from the center.) Now you can pull and push on the side of the frame around the selection and deform the selection to an oval. In the center there is a little lever that you can use to rotate the oval to match the orientation of your cat's pupil. Then dragging on the corners of the frame uniformly resizes about the center. (Alt-PgUp and Alt-PgDn work too for resizing, and Alt-arrow keys for moving.) -Kris |