Tag Archives: image

Image Stitching

Sorry for not give any update on this blog. Yeah, I am still busy with courses, homework and project and also exams. Let’s discuss about Image Stitching. This is very common Computer Vision Project, which is my CV homework too. But, it is okay to keep discuss about it because the popularity has risen recently. Especially after it is implemented in most smartphones.

What is Image Stitching?

Image Stitching is the process of combining multiple images with overlapping views to produce a wide-angle panorama. Although this combines many images into one, it combines two images at a time. For gives the clear definition I would like to give an example.

Suppose we are given 3 images

Building 1

Building 1

Building 2

Building 2

Building 3

Building 3

those 3 images are look same, just a bit different. Yes, it indeed captures the same object. I am going to jump to the result. The result, roughly like the following

Result Building

Result Building

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Image Histogram

Image histogram is a type of histogram that represent the lightness distribution in digital image. In order to clarify the idea, I am going to give an example.

Suppose we have an image, say depth is 2 bits (2 bpp). Therefore, the possibility value 0 – 3.

Sample Image

As I mentioned, histogram is going to represent the distribution of pixel value. You can see, there are 5 pixels with value 0, 7 pixels with value 1, 9 pixels with value 2 and 4 pixels with value 3. These information is tabulated as follows.

Pixel distribution

As you know, like histogram in math, histogram is presented using graph. The following graph represent the distribution in image above.

Image Histogram

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