In this tutorial we'll show you how to salvage an image that has blown out highlights. This is a problem that is familiar to photographers shooting transparency film, which has an effective contrast range of about 5 stops. If you are not careful with your exposure you can easily lose all detail in your highlight areas, with no way to get it back: they "blow out" to clear (white).

submitted: 5 years and 3790 days ago

In this tutorial we'll show you how to do gaussian blur overlays using GIMP. This is an interesting technique that intensifies and saturates the colors in the image, increases contrast, and adds a slightly hazy, "dreamy" feel to the image.

The basic technique is to create a duplicate layer in the image, lighten it and blur it, and combine it using a layer mode with the original.

submitted: 5 years and 3790 days ago

In this tutorial we'll show you how to sepia tone a color or black and white image. This technique is modeled on the traditional darkroom method of sepia toning in that the sepia color is applied "unevenly" to areas of different tonality. It works much better than most of the simple methods I've seen for image editors and provides great control!
The basic technique is to create a "Sepia Mask" that will apply a sepia color layer according to a layer mask that is based on the tonality of the image.

submitted: 5 years and 3790 days ago

In this tutorial we'll show you how to do create a contrast mask for your image in GIMP. A contrast mask allows you to reduce overall contrast, simultaneously bringing out more detail in highlights and shadows. This may be necessary to obtain a decent print, because prints on paper do not have as much dynamic range as a monitor; if you don't control the contrast, detail in the highlights may blow out and detail in the shadows can block up and become muddy or even black. You can of course modify your image directly in GIMP to decrease contrast, but the advantage of the contrast mask technique is that it allows you much more precise control, and gives better results.

The basic technique is to create a layer above the image that contains a B&W negative of the image. The images are combined in overlay mode: dark parts with light, light parts with dark. All the while your original image remains blissfully unchanged on its layer.

submitted: 5 years and 3790 days ago

Digital cameras often have quite some noise in their pictures. Some are worse than others, but it's there. Here I'll show you a way to get rid of that noise using the selective Gaussian blur filter.

The basic idea behind selective Gaussian blur is that areas in the photo with contrast below a certain threshold gets blurred. You could think of it like the opposite of unsharpen mask (that sharpens everything with contrast above a certain threshold.

submitted: 5 years and 3790 days ago

Images captured by a CCD or CMOS imaging chip will often have some noise present. This noise typically can be seen as RGB "flecks", especially noticable in the in the shadow areas of an image. The red and blue channels are especially susceptible. Higher ISO settings and higher ambient temperatures increase the likelihood of acquiring this noise along with your image.

If you find it necessary to shoot with a higher ISO and you find that you have an unpleasant amount of noise in your image, this tutorial will help you improve the image.

submitted: 5 years and 3790 days ago

In this tutorial we will explain how to convert a color photograph to a B&W one with color restored to selective areas. With the right subject this can give really striking results, as you can see for yourself. This technique is elsewhere referred to sometimes as "hand coloring" :-)

The basic technique is to duplicate the color photograph, convert the duplicate to B&W, and paste it as a new layer on top of the color image. Add an opaque layer mask and then selectively paint transparency into the upper mask, exposing the color photograph underneath.

submitted: 5 years and 3790 days ago

Converting Color Images to B&W with GIMP.

submitted: 5 years and 3790 days ago

Welcome to the advanced GIMP animation tutorial. Here you'll learn how to use the GAP, GIMP animation package. It is very advanced, but the user interface might be confusing for some at first. That's why we'll start with a little theory before we move over to the practical part.

The key function of the GAP is the move path dialog. Please go to the "Using GAP" tutorial to learn more about the tool.

submitted: 5 years and 3790 days ago

GAP is an advanced tool to be able to create animations, this guide should give you some sort of view of how GAP works and what you can do with it.

submitted: 5 years and 3790 days ago