#Photoline change text direction series#
#Photoline change text direction windows#

L* mean ± L* noise: sets limits on the meaningful signal above or below the shadow or highlight threshold.SNR (signal-to-noise ratio): L* mean / noise,both luminance and total.The raw standard deviations are given later.)

(The conventional ranges of a* and b* are 255, while that of L* is 100 I have scaled a* and b* to ranges of 100 for the purpose of noise measurement, as if the L*a*b* color space were a 100×100×100 cube otherwise, the total and chroma noise values seem counterintuitively large compared to the luminance noise.

total noise: the standard deviation of the ∆E* ab color distances,.

(It and the total noise are multiplied here by 10 to fit better when graphed with the rest.

luminance noise: the standard deviation of the ∆L* distances,.

L* mean: the mean L* (lightness) value of the pixels sampled.

The spreadsheet data are as follows (the basic ones are highlighted for now you can ignore the rest): There are many ways to graph the data I use a spreadsheet program to open the. csv,” paste the title that you copied earlier, then save the file. The result includes some basic data in conventional text form, and, more importantly, the entire data output as CSV (comma-separated values). O.K.: press “o.k.” to process the images it should take just a few seconds in L*-only mode. The exposure order setting is saved as an.

#Photoline change text direction series#

(This option may not work for exposure series because more than one image may have the same lightness value, especially at the high end.) If the images were not taken in order, or if the order cannot be determined from the file names, you may have to manually rename the files, such as by prepending a two-digit number (01_IMG123, 02_IMG122, 03_IMG121, etc.). If the images are unrelated, choose “none” and they will be ordered by L* value. Choose an exposure order depending on how the images were taken: dark-to-light, light-to-dark, or middle outward (like V, VI, VII, VIII, IX, X, IV, III, II, I, O), and the script will reorder them for you. Mode: keep the default, batch process L* only, for now.Įxposure order: batch-processed images are meant to be ordered dark to light. csv file (Photoshop scripting can’t do this automatically).

Copy it so you can paste it as the file name when saving the text or. Title: optional use it to label data with things like the RAW processing settings. Process them together, then open them all in Photoshop. (Tip: when doing multiple batch processes, do this to the RAW files.) Crop a nice uniform central area 100-300px square is a convenient size range but don’t otherwise resize/resample them. Append zone numbers to the filenames after an underscore and before the file extension, in the form of IMG_0123_VI.tif for zone VI, and the script will automatically extract them. To use the BTDZS tool, start with a series of images of a uniform target, preferably out-of-focus to eliminate any actual image detail. There are a few differences between how it runs in the versions the progress bar does not work in CS2, for example, and CS5 uses a color sampler tool that CS2 does not have but the results are almost identical.

#Photoline change text direction windows#

The script works in Photoshop CS2 and CS5 (the versions I have) using Windows XP, 32-bit, and CS5 using Windows 7, 64-bit I don’t think it will work in prior Photoshop versions. I have pared the script down to these elements in BTDZS tool basic it is much simpler to use and probably all you will ever need. The important measurements are the mean L* (lightness) value and signal-to-noise ratio. It began as a way to use Photoshop scripting to determine total image noise, then sort of grew out of control. The BTDZS tool is what I originally wrote to measure calibration images.