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Software Reviews

Photo Image Filters for Adobe Photoshop (free)

Michiel Kamermans (Mikepoison)


Keywords: software, adobe, photoshop, filter, postprocessing

Show pages (6 Pages)

PhotoImage by Michiel Kamermans


 

Photo Image is a collection of Adobe Photoshop® filters meant for retouching photographs. You can of course use it for different purposes, as long as you keep in mind that I won't promise good results with anything other than photos.

 

The collection consists of

Chrome
A monochrome conversion filter, and then some.

 

Enhance
Like the Lensfilter, but for Photoshop!

 

Expose
Now there's something you might want on your camera!

 

Temperature
Unless you're part of the governmental weather control team, you'll like this filter.

 

I am not sure with how many more filters this set will be expanded, but for now, these filters will do. They cover the needs for filtes that I yearn for myself at the moment, plus they made up a good exercise for both my fingers and mind. Programming filters is pretty easy - if you know what you want them to do.

 

 


Chrome

Chrome is a yellowish colored monochrome filter. It has five sliders which can be used to perform the functions that you logically assumed when looking at their labels:

 

Overexpose Sets an amount of overexposure. This goes over the top when reaching 255
Underexpose Sets an amount of underexposure.
Chrome - Silver Sets the amount of grayscale as opposed to "yellowscale". The grayscale applied is not the same as a regular grayscale conversion.
Lighten Increases the colorinformation with the used value. (same as a positive "brightness" value)
Darken Decreases the colorinformation with the used value. (same as a negative "brightness" value)

 

Overexposure and Underexposure can be combined to perform an "Increas Chromage"-like function. raising both with the same value results in the Chrome saturation being raised slightly. I included the last two because there are a lot of filters without built in brightness/contrast/gamma function. as I don't know how to do contrast and gamma correction yet, this'll do for now. more to come in the future though.

 


Original Image


Chrome applied with default settings


Chrome applied with Silver


Chrome applied with 100 Overexposure

 

 


Enhance

You might be familiar with the Enhancer filters for SLR camera lenses. What they do is to enhance the red aspect of an image, while not (or very slightly) adding red to the green and blue areas of the image. You may now wonder whether this filter is obsolete due to the "Color Balance" feature of Photoshop. Well, no. Color balance adds a new red value to every pixel, not just to the red ones - it creates odd values for green and blue too. This filter enhances the red only if a color has less than 4% red in it. It enhances red and reduces green and blue with a minor amount (5 if both sliders are at 255) - if there is more than 4% of red in the pixel. The options are:
 

 

Enhance This increases the red component, and if there is more than 4% red, also slightly blue and green.
Multiply This multiplies the enhancment value by increments of 1 multiplication per value of 20.

Enhance might come in handy for shots of forest or general nature stuff. It is also a nice alternative to a red-enhancing color-balance operation. Try it, it's quite usefull with some images!


Original Image


100 Enhance


100 Enhance, 100 Multiply


255 Enhance, 100 Multiply

 

 


Expose

As the name might suggest, this filter adjusts, or magically creates them out of nowhere, picture exposure values. It might not be a professional filter, since I'm only a simple student of computer sciences, and not some highly trained photgraphic wizard with a major in optic sciences and a major in algorithmic math. And the exposure doesn't take into acount the type of lightsource that was being used, but I tried to make a good filter anyhow. The options are as follows:

 

Overexpose Overexpose the image
Underexpose Underexpose the image
Filter Red Removes red from the image with a given value
Filter Green Removes green from the image with a given value
Filter Blue Removes blue from the image with a given value
Lighten Increases the colorinformation with the used value
Darken Decreases the colorinformation with the used value.

 

Though this is roughly "Chrome", I included these options in a seperate filter, because you don't necessarily want a grayscale image when you want to adjust the exposure. Eventhough the RGB filters are also easily done with the colorbalance function, I added them because I don't want to use two different filters for one adjustment.

 


Original Image


100 Overexpose


100 Darken - normal - 100 Lighten


100 Underexpose

 

 


Temperature

The temperature filter simulates hotter and cooler lightsources, and thereby, a hotter or cooler image. This filter doesn't need a brightness/contrast/gamma part, because that completely diminishes the effect of the temperature change. This filter is meant for scenery shots (nature, architecture, anything not involving a single color/wall or something similarly color-bland).

 

Hotter Creates a higher temperature / more light result
Cooler Creates a lower temperature / less light result

 


You can combine the two. as they both use slightly different functions for decreasing rgb values, the chance that a combination of values yields the original image is very small. (though the difference will not be very big, to be precise : between (6,2,3) and (0,0,0).

 



Original

 


Cold / Cloudy


Warm / Sunny

 

 


 

The Adobe Photoshop® filters in the software collection "Photo Image" is Copyright © by Michiel Kamermans, but I'll waiver that Copyright the second someone can prove that the name is already in use. I don't know whether it's in use right now, and if it is Copyright, a registered trademark or protected in any other way, I have no reservations changing the name immediately upon notification of this fact. Demonstration images, the Logo, the filters, and names linked to their specific task contained in this set are all Copyright © by Michiel Kamermans 2000. Not to be boring, but this document is Copyright © by Michiel Kamermans 2000.

 

Installation Notes

To install these filters, make a directory in your Photoshop\Plug-ins directory called "Photo Image" and copy the filters into it. After you startup (or restart) Photoshop, these filters can be accessed through the "filters-PhotoImage" option.

 

You can download the following filters here (right-click and use "save as..."):

 

Chrome
Enhance
Expose
Temperature

 

Or use this link to download all the four files as a ZIP file:
ZIP-Archive of all four filters. You need to extract the files on your computer after the ZIP-file has been downloaded before you can use the filters.

 

See also the Software/Adobe Photoshop forum for discussions on these plugins. You may also post any questions and/or ideas on these filters there.

Sincerely,

Michiel Kamermans

 

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Show pages (6 Pages)

Originally written on October 24, 2005

Last updated on December 7, 2017

Michiel Kamermans Michiel Kamermans (Mikepoison)

Amsterdam, Netherlands
Basic, 255 posts

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