How to save, then print, a histogram?

"Pixmaker" wrote in message

I'm doing some calibration of my camera and the ways it will balance TTL flash...clearly OT for this NG. But I want to bring up the histogram and then print it to accompany the image it depicts.
The histogram shows as an .ALV file.

Is it possible to convert this file to something prontable, like a JPEG? Or must I resort to a screen-capture trick to get it into print?

The ALV file contains your levels settings, and not the histogram.

It's worth looking around for a plugin to do this. Barring that, I think you're going to need to do a screen capture.
--
Mike Russell
www.curvemeister.com

I'm doing some calibration of my camera and the ways it will balance TTL flash...clearly OT for this NG. But I want to bring up the histogram and then print it to accompany the image it depicts.

The histogram shows as an .ALV file.

Is it possible to convert this file to something prontable, like a JPEG? Or must I resort to a screen-capture trick to get it into print?

Again, ideas much appreciated.

PixmakerinFLL
==========================
It's not the heat, it's the humidity
==========================
(Think the humidity's bad?
You should watch us vote!)
==========================

Pixmaker wrote:

I'm doing some calibration of my camera and the ways it will balance TTL flash...clearly OT for this NG. But I want to bring up the histogram and then print it to accompany the image it depicts.
The histogram shows as an .ALV file.

Is it possible to convert this file to something prontable, like a JPEG? Or must I resort to a screen-capture trick to get it into print?

It's not exactly what you're after, but I have written a plugin that stores histogram values to a text file. They could be easily graphed with something like Excel, or compared with numerical formulae: http://www.telegraphics.com.au/sw/#histotext

Again, ideas much appreciated.

PixmakerinFLL
==========================
It's not the heat, it's the humidity
==========================
(Think the humidity's bad?
You should watch us vote!)
==========================

I've downloaded, installed, and used your HistoText plugin.

Unfortunately, I can't seem to find *any* documentation that tells me just exactly *what* the text file it generates is trying to tell me.

Inquiring minds want to know ... OK, now we've got what appears to be a tab-delimitated or space delimitated text file of a bunch of numbers. HOW are those numbers organized? What do these numbers represent?

"toby" wrote in message

Pixmaker wrote:

I'm doing some calibration of my camera and the ways it will balance TTL flash...clearly OT for this NG. But I want to bring up the histogram and then print it to accompany the image it depicts.
The histogram shows as an .ALV file.

Is it possible to convert this file to something prontable, like a JPEG? Or must I resort to a screen-capture trick to get it into print?

It's not exactly what you're after, but I have written a plugin that stores histogram values to a text file. They could be easily graphed with something like Excel, or compared with numerical formulae: http://www.telegraphics.com.au/sw/#histotext

Again, ideas much appreciated.

PixmakerinFLL
==========================
It's not the heat, it's the humidity
==========================
(Think the humidity's bad?
You should watch us vote!)
==========================

Yeas, I believe you're correct. ASh, well, the screen capture isn't the best way of comparing lighting, etc. but it will do for now.

At least, as with many engineering tasks, it's not the absolute values that are important; it's the changes.

Thanks

PixmakerinFLL
==========================
It's not the heat, it's the humidity
==========================
(Think the humidity's bad?
You should watch us vote!)
==========================

RSD99 wrote:

I've downloaded, installed, and used your HistoText plugin.
Unfortunately, I can't seem to find *any* documentation that tells me just exactly *what* the text file it generates is trying to tell me.
Inquiring minds want to know ... OK, now we've got what appears to be a tab-delimitated or space delimitated text file of a bunch of numbers. HOW are those numbers organized? What do these numbers represent?

Looking at a sample run on an RGB image (long lines abbreviated),

Planes Cols Rows Count
3 375 500 187500
5 5 8 5 45 272 683 961 ... 42 81 265 975 2242 2673 3219 2819 ... 2835 1477 2535 4481 4998 4676 4377 3903 ... Mean Min Median Max
105.156 0 106.0 255
60.898 0 53.0 217
42.153 0 28.0 211

The first line contains headings for the second line (self explanatory). Lines 3-5 are the red,green,blue histograms (each line has 255 values). Line 6 contains headings for the last three lines, which are statistics for each channel as shown in Photoshop's histogram window.

"toby" wrote in message

Pixmaker wrote:

I'm doing some calibration of my camera and the ways it will balance TTL flash...clearly OT for this NG. But I want to bring up the histogram and then print it to accompany the image it depicts.
The histogram shows as an .ALV file.

Is it possible to convert this file to something prontable, like a JPEG? Or must I resort to a screen-capture trick to get it into print?

It's not exactly what you're after, but I have written a plugin that stores histogram values to a text file. They could be easily graphed with something like Excel, or compared with numerical formulae: http://www.telegraphics.com.au/sw/#histotext

Again, ideas much appreciated.

PixmakerinFLL
==========================
It's not the heat, it's the humidity
==========================
(Think the humidity's bad?
You should watch us vote!)
==========================

RSD99 wrote:

I've downloaded, installed, and used your HistoText plugin.
Unfortunately, I can't seem to find *any* documentation that tells me just exactly *what* the text file it generates is trying to tell me.
Inquiring minds want to know ... OK, now we've got what appears to be a tab-delimitated or space delimitated text file of a bunch of numbers. HOW are those numbers organized? What do these numbers represent?

My other post didn't really answer your second question. A histogram is a series of counts. Each value on lines 3-5 is a count of occurrences of that channel value in the image (0-255). If you graph this data you will see a chart just like the one in Photoshop's histogram window.

"toby" wrote in message

Pixmaker wrote:

I'm doing some calibration of my camera and the ways it will balance TTL flash...clearly OT for this NG. But I want to bring up the histogram and then print it to accompany the image it depicts.
The histogram shows as an .ALV file.

Is it possible to convert this file to something prontable, like a JPEG? Or must I resort to a screen-capture trick to get it into print?

It's not exactly what you're after, but I have written a plugin that stores histogram values to a text file. They could be easily graphed with something like Excel, or compared with numerical formulae: http://www.telegraphics.com.au/sw/#histotext

Again, ideas much appreciated.

PixmakerinFLL
==========================
It's not the heat, it's the humidity
==========================
(Think the humidity's bad?
You should watch us vote!)
==========================

A data object for the histogram is readily accessible via Photoshop's scripting interface. So you could write a script to the draw the histogram, if you know how to write scripts.

--

Warren S. Sarle SAS Institute Inc. The opinions expressed here SAS Campus Drive are mine and not necessarily
(919) 677-8000 Cary, NC 27513, USA those of SAS Institute.