Definition Of Resolution

Resolution- The detail of which an image hold, the term applies to digital and film images and it can be measured in a variety of different ways. In terms of images the higher the resolution is in an image means the more detail that an image will have.

Who’s Uses Resolution and Why?

Resolution is mainly used by photographers and image editors in order to make their image quality better. If you have an image with a really low resolution then it won’t have much detail and it will also look quite blurry. It is important for a photographer to have a high resolution in their images as it means that they will be able to show all the detail that they can possibly show and it also makes their images look very sharp. There is a very big difference between images with a low resolution and a high resolution and I think that the quality of an image really shows in terms of how professional you are as a a photographer and also it shows how seriously you take your work and whether you really want them to look good or not. I have included an example of the difference between a low resolution image and a high resolution image.


As you can see from the high resolution image the image is really sharp and you can clearly see all of the detail. Where as in the low resolution image you can’t really see much detail and all around the outside of the hand and the lamp it looks quite pixelated and blurred.

How Is It Useful?

Resolution is useful in photography as it makes your images look a lot more sharp and it refines the details in the images. It allows you to see a lot more detail and it can also make an image look a lot more professional. There are many different ways that you can change the resolution of an image including using preview of images on a mac and also using photoshop. Using photoshop means that you have more control of the resolution and you can change it to whatever level you want meaning you could have a really high resolution a mid range resolution or a really low resolution. This also shows how it is relevant in photography as this type of resolution is to do with images and pictures and there quality.

Resolution Task

Whilst focusing on resolution we were required to do a task involving resolution and taking our own images in order to back up our research and to show that we understood resolution. To do this we took a cut out of a sudoko from a newspaper and stuck it to the wall and using our cameras we shot the cut out nine times. Each time we were constantly changing the aperture and the focal length. We used nine different shots one for each different image;

  • 18mm F3.5
  • 18mm F8
  • 18mm F22
  • 35mm F4.5
  • 35mm F8
  • 35mm F22
  • 55mm F5.6
  • 55mm F8
  • 55mm F22

I have included the contact sheet of my final nine resolution shoot images.ContactSheet-001.jpg

 This was the first task that we completed for resolution we then had to use these images and zoom and crop on photo shop to be able to clearly see what resolution was the best and the worst for each focal length.

To do this task we loaded 3 images from each focal length all with a different F stop into photoshop and loaded the navigator. After doing this we then zoomed the image up to 100% on the navigator so that we could identify if the image was still clear and whether there was any colour fringing around the lines and also the words and numbers. We then cropped the images so we just had the left hand corner in the frame rather than the whole thing, this was so that we could focus on just the lines and the corners of the puzzle. We then repeated this two more times so we could test it with each focal length. There were a variety of different results which all depended on the focal length and the F stop. After zooming in and cropping around the left hand corner, we repeated the same process but this time we cropped the middle of the puzzle so that you can focus more on the numbers and the thinner lines in the centre rather than the thicker black lines around the edge this is also showed a variety of results depending on the F stop and focal lengths. We then saved these images and created three different contact sheets for each different focal length each of which containing the first images that we took from the original contact sheets, the zoomed in pictures for the left hand corner and then the zoomed in pictures from the centre of the image. There is a total of 9 images on each contact sheet 3 for each F stop that we focused on. I have included the three different contact sheets below with an analysis into the results and which image I thought had the best and which one had the worst resolution.

This is the first contact sheet I produced when focusing on 18mm length. I can really see a difference in all of the different results and I think that this first contact sheet went really well as I was easily able to identify these results and they show up very clearly so that others can easily see them as well. I think that firstly the F stop of 3.5 is one of the worst out of the three. I think this because the lines are very blurred in the corner and it also looks like bad camera shake has happened in this image. You can also see some very yellow colour fringing around the outside of the lines and these yellows lines and the fringing shows the lower resolution as it makes the image look a lot more blurred, it lowers the quality as if this image was a lot bigger then it would be an image with a low resolution as you would be able to see the blurriness when it gets blown up or printed and certainly if you were to blow it up it would increase the lines and the colour fringing would become a lot more visible. When you move onto the centre of the image the numbers in the puzzle are clear enough for you to read them but then again they are also quite blurred and fuzzy. The smaller lines that go around the outside of the numbers are also quite fuzzy and you can slightly see the colour fringing much in the top corner. Moving on from this you can see the next result which still isn’t the best but it is an improvement from the first image. This is the image with the F stop of 22. The first images had a yellow colour fringing around the outside of the lines whereas this one has a purple colour fringing around the outside the shows that the colour is getting better as it goes from the worst being yellow fringing, then the next being purple fringing and then finally the lines go completely black. I think in these second lot of images the black lines are a lot clearer and they are a lot sharper than the first lot of images you can also slightly see texture of the paper and it is a lot clearer than in the first image. The numbers are also a lot more sharper than in the first image but there is still some more fringing around the outside of the thinner lines and the numbers. Moving onto the image that I think has the best resolution which is the image with the F stop of 8 the reason I think this is because you can really see the texture of the paper and the black lines in the corners are really sharp and there is still some fringing but a lot less than the other two images. I think that the numbers are also very clear and there is also less fringing around them. This shows me that it I was going to take an image with a focal length of 18mm then I would use an F stop of 8 in order to get the best resolution.
The second contact sheet that I created focused on the focal length of 35mm and this showed me very similar results compared to the first one. I think that F8 is still on of the best ones that was taken but this time around I think that F 22 is the very worst were as before I thought it was okay and it could almost be something that could be the best. I think that in these images there is a lot less colour fringing that it visible but there is still some there that you really have to look at to try and find. Much like the previous contact sheet I made I found it very  hard to decide which was the best between the final two, previously it was F22 and F8 but this time around I think that it is F8 and F4.5. The reason I think this is because they look very similar in terms of there results. I think that they basically look the same in terms of fringing and the sharpness of their lines. I think that if I had to choose and only use one of the F stops then I would probably choose F4.5 as all of the lines and numbers are really sharp and in focus and I can almost see no colour fringing around the outside of the numbers of the lines and I also think that the texture of the paper in the image is really clear as it is so up close and the resolution is so good. If I was to have a choice between only F8 and F4.5 then I think that I would have to choose F4.5 as I think that this would give the best results. I think that these results are very similar to my first contact sheets but in terms of my last contact sheet that I had to make I think that the results were very opposite and completely different to what I first expected. I expected them to all be very similar as they all looked similar when I first looked at them. After I had zoomed in and cropped them properly I was surprised to see that all of my results were so varied and different from what I first assumed. I think that the cropping and the zooming of the images made a very big difference to the way that I look at the images and the way that I see them. When I looked at my first original contact sheet I thought that all the resolutions were good and they kind of all looked the same. But then after zooming them and cropping them I got to see them in a different light and from a different angle and this enabled me to really see them in a different light and because all the results are so close up you can really see the differences in resolution rather than just looking at them as a normal image from quite far away. I think that it is good that you get a wide variation of results in projects like this because it enables you to compare and write about different focal lengths and F stops from different points of view.
This is my third and final contact sheet that I made which focused on the focal length of 55mm. This was the final focal length that I worked with and I think that compared to the first contact sheet that i made for my first focal length this one gave me almost opposite results. In my first contact sheet I came to the conclusion that F8 would be the best F stop for me to use if I was using a focal length of 18mm this is because I that it would be the best one for me to use at it had the most clear and sharpest results with barley any colour fringing. However in this on F8 is the complete opposite I think that it is one of the worst ones on this contact sheet and it would be the first one that I wouldn’t use as the quality is so bad and there is a lot of yellow colour fringing around the outside. Even though the original picture was actually in focus I still thought it was quite fuzzy and that the lines weren’t precise and sharp, I also feel that even though the numbers are quite clear they could be a lot clearer and sharper. I feel that the F stop of 22 gave the best results out of the three as it gave precise sharp lines and numbers without any fringing at all. A lot of people have said that using a bigger aperture would mean that you would get a better result which hasn’t shown in my previous contact sheets as it has always been a smaller aperture that I have used that has given the best results but for this one the bigger aperture proved to be the best which is what a lot of people had previously said. The reason I didn’t choose the smallest aperture as my best result like the previous contact sheets is because it still had some fringing on it even though it didn’t show up as much it still wasn’t as clear as the F22 which is the one I chose as the best. I also think that with the F5.6 the smaller lines in the puzzle were quite blurred and they could have been a bit sharper than they were. I think that the smaller lines almost look fuzzy and grey and also with the fringing it makes them look a lot less sharp. However with the best one that I felt that because there was no fringing it made pretty much all of the lines big bold and black and you could clearly see them without it coming out all fuzzy with colour fringing. I think that these results really showed a big opposition between my other two contact sheets and this really surprised me as I had already seen that my first two contact sheets were very similar so I had already thought that maybe it would be the same for my third but I was clearly wrong as I got very different results. In conclusion I think that if I was working with 55mm focal lengths then I would use 22 as my F stop and I would not use something as low as 8 or 5.6 as I won’t get the results that I want.

I am very happy with the way that my images came out and I am very happy with the final results.

I think that this task was good to do as because in our triptych project our images are being  blown up quite big and displayed in a place were a lot of people can see it, it is important that we are able to get the resolution right so that the image looks good and that the quality is good enough for it to be blown up quite big. I think that if they were blown up quite big and the resolution wasn’t right then my image wouldn’t look as good as I first expected it to and I won’t be very happy with my results. I think that knowing the resolutions now and knowing what F stops I should use a different focal lengths will give me the ability to get good high resolution images in my final project rather than taking one image and it being wrong and of a low resolution and having to take it over and over again until I get it right. I will use my knowledge of resolution and F stops whenever I take my images or change my focal length.


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