Showing posts with label Tactile drawing. Show all posts
Showing posts with label Tactile drawing. Show all posts

Wednesday, 18 March 2015

Eye tracking drawing technology

Graham Fink has an exhibition at Riflemaker at the moment that relies on using eye tracking software, in particular he has acquired a Tobii 'eye-tracker'. See: 

The technology works by shining infra-red light directly into the eyes. The reflections are recorded by a camera through multi-algorithms and filters which allow eye movement to immediately be translated to a screen. 


This type of software is becoming more available as developments in aids for people who have lost their limbs or body functions becomes more sophisticated. 




As you can see from looking at the two drawings above the images are very close in appearance to those drawings done in exercises when you are asked to keep drawing whilst looking at the subject and making your hand follow what you are seeing without looking at the paper. If you have not done this, you should try it. It's interesting that the gallery celebrates this as a unique thing, when for many artists working in this way is basic bread and butter stuff. The only thing that has changed is that computer software and a printer have replaced the brain and hand. 

It is interesting to compare these computer drawings to other images. 

Giacometti

As a sculptor Giacometti feels for the face in space. His eye movements being tracked by his pen as he searches for what is there in front of him. 


Claude Heath

 Claude Heath is actually feeling for the form. The white dot on top of the 'head' being the point where his feeling starts from. 

"When you follow the movements of a football across a flat TV screen you sometimes have the sensation that the ball is going in a certain direction when it turns out to have a different arc altogether and ends up at the feet of a different player than you had first thought. Its true movements are hidden by the flatness of the screen until it arrives at some particular part of the pitch. This same kind of sensation sometimes happens while drawing, when you attempt to compress the sight and touch of a solid object onto various parts of a flat surface". 
Claude Heath 

Claude Heath has been fascinated for a long time with how we see and how a drawing can trace a memory or record of the process. 

Thinking about looking has of course been central to drawing practice for hundreds of years from Durer's investigations of drawing technology to Cezanne's preoccupation with trying to record those "petit sensations". As someone who draws every day it has always been a central concern of my own and I often return to this activity in order to refresh my own drawing language with a dose of perceptual reality. 
Durer
Cezanne

See also:

Sunday, 15 March 2015

Cross Contour Drawing

Whenever you have to deal with mass in a drawing, cross contour lines are a potential approach. Sculptors in particular have to deal with mass and therefore have often developed a cross contour approach to drawing. Working in this way, is not about developing a cross contour style, (always beware of stylisation) it’s about recognising when and where to place marks so that they indicate the mass that they relate to. Time spent making this sort of drawing helps to develop the eye’s ability to recognize change in surface direction and aids your hand’s ability to respond to these changes by both developing control and getting used to inventing marks to suggest surface texture and mass at the same time
Moore: Shelter

Moore: Study for sculpture: Family Group

Moore: Etching: Elephant Skull

Henry Moore used cross contours throughout his life and was very sensitive to their use in a variety of ways. In the etched drawing of an elephant skull above, you can see how his lines trace over the surface of the bone and in doing so pull your vision in and out of areas of light and dark. In this case Moore is allowing the lines he makes to do two things at once. He masses lines together to create dark holes and then allows cross contour lines to ‘escape’ from the dark and travel over surfaces. Compare this drawing with his earlier ‘shelter’ drawing. Again we see the use of cross contour lines, this time combined with wax resist and ink lines that trace over the form. His studies for sculptural groups of figures are particularly sensitive to the use of contours, the heavy mass of stone being suggested by crayon and the changing of direction of surfaces suggested by the contour lines as they make their way over three dimensional forms. The 'stone' texture is suggested by the use of a grey wash, this also being used to describe the play of light over the mass, however in this case the contour lines are still clearly seen, as the wax rejects the wash and the lines stand out in white.
Cross contour lines are drawn lines that travel across the form. They may be horizontal or vertical, or both, often when describing more complex forms, cross-contours are drawn at varying angles, sometimes changing direction as they develop to suggested planar change. When I was a student a classic exercise was to imagine an ant making its way over an object you were looking at. You then had to draw the traces of its imaginary movement as if its feet left a line of marks. The trick to this was not only hard looking and thinking, but to imagine an unpredictability of movement, as if the ant had a mind of its own and kept changing direction. This exercise made you ‘feel’ across a surface and you got used to adjusting the direction of marks so that they ‘sat’ in the space convincingly.




Map contours work in a similar way, (see above) as they gather together they suggest a sharp drop or steep incline, as they spread out they suggest a tilting plane or gentle slope. 

In mathematics geometric contour lines are often used to visually describe complex three-dimensional forms, such as rotating surfaces. See above. This type of geometric thinking having a history that goes back to the Renaissance and Uccello’s wonderful drawing of a vase.

Uccello
Present day computer realisations that use wire frame modelling continue this long tradition.
You can find examples of cross contour lines in the work of many artists both historical and contemporary.
Durer

In this drawing of a man’s head by Durer, you can see a particularly subtle use of lines following the surface of the skull. Lines are drawn in white as well as black, this allows the artist to suggest two things at once. A line can follow the direction of the surface, thus indicating the physical mass or ‘haptic’ nature of the subject and at the same time can indicate the way light plays over the form. This allows the artist to place the subject in a convincing space. Mass and space are therefore synergistically combined in this sort of drawing.

Victor Newsome’s drawing ‘four views of a figure’ uses cross contour lines within a very technical approach. His figures look like they have emerged from an engineering drawing, suggesting that as humans we are at the end of the day simply living machines.  This woman in a bath is one of a series of drawings that Newsome made, the study of a head (below) gives a clear idea of how he used perspective contour lines to simplify form. (He is also another former ex-student of LCA) 

Victor Newsome

Victor Newsome

The study of ears by Newsome above is currently on display in the Ferens Art Gallery in Hull. 

I've used cross contour drawing myself many times and usually to give weight to an idea. For instance this idea of a head like form with a hole through it would not be convincing if it hadn't been drawn using a method that gave it formal weight.

Hole in the head
Hans Bellmer

Hans Bellmer's, Bastille Corset, uses brick-like structures to suggest both the soft shapes  of a corset and the structural presence of a brick wall. Bridget Riley uses the same visual effect to create spatial movement in her early black and white canvases. 

Bridget Riley

Although always spoken about as if being entirely about 'optical' effect, Riley's early work, I would suggest, relies upon a strong awareness of the relationship between touch and sight. In some ways the disorientation you feel in front of her 'Op-art" paintings is a very physical one, that derives from our brain's search for a solid on which to pin the illusion. 

Perhaps the most important issue about cross contour drawing is that it brings together sight and touch. You are drawing as if you are feeling over a surface and it is well known that children need to feel objects in order to begin to picture what they might be, touch reinforcing what is seen. It has therefore been argued that touch comes before sight in our world of organised perceptions. 


As Margaret Atwood wrote: “Touch comes before sight, before speech. It is the first language and the last, and it always tells the truth.”


Atwood points to a key element of meaning, authenticity is vital to our awareness. There is something about 'trust' here. Touch is more 'honest', we believe in it, therefore by working in a way that brings us back to an awareness of touch, we can build a feeling of 'truth' into the image. The solidity we perceive in front of a Henry Moore drawing also means that we 'trust' that these forms are 'authentic', the lines that trace their mass telling us that these images have weight and therefore a certain 'gravity'.


Related Posts 






Solidified drawing: 3D printing 



Tuesday, 17 February 2015

Swell Paper

We have been looking at the relationship between touch and sight in some of the level 4 sessions. I was doing some research into how people with sight impairment could read diagrams and discovered that there is such a thing as ‘swell paper’. Swell paper offers an interesting solution to the problem of making drawings in shallow relief so I thought it worth a post. 


Look carefully and you can see how the surface is raised underneath the black areas.

This technique was designed for drawing raised diagrams and probably works at its best when using clean sharp images and thick lines.
There are several different makes of swell-paper, sometimes called capsule paper, puff paper or fuser paper, available, the trade names include Tangible Magic Paper, Matsumoto, ZyTex and Flexi-Paper. Some need more heat than others to raise lines and like any other material you need to work with it to find out its full potential. Ask for free samples of paper from suppliers, and of course test, test, test. 

For papers that will work on a photocopier I have seen good recommendations for Tangible Magic Paper.

Because black photocopier and laser printer toner is carbon, these two devices can produce wonderful images for tactile graphics. However, they both have very hot internal parts, and it can cause a very bad paper jam if you attempt to print or copy onto swell paper without taking a few precautions first:

1: Always pass your swell-paper through the manual feed of the unit, one sheet at a time;

2: Try to use the copier or printer just after it has been switched on from cold, or after it has been idle for long enough to cool down. Never use it immediately after a large print or copy run, because the swell-paper can swell in the high-temperature environment inside the unit, and cause a very serious paper jam. I.e. keep it cool and don’t try and put several sheets through one after the other, because the machine will get too hot.
Zychem Ltd. supply specialist heaters for work with their swell paper, but you can also e mail files to them for printing on non standard sizes. From what I have seen the images made from their dedicated machines are very good. 

Web links

For Zytex swell paper and specialist heating machines from Zychem click here

A useful video here can help you to think about how an image should be simplified before being translated into a black and white line diagram.

www.tactilegraphics.org- a collection of resources for people doing tactile graphics. There is an excellent Decision Tree linked from the front page. This might be for graphic designers, but it is also a useful guide for when thinking about whether or not a drawing would work as a shallow relief.
Lech Kolasiński has made five adaptations of paintings by Jacek Malczewski. The image below, ‘Tickled to Death’ is divided into two longitudinal halves, each of the re-interpretations is a reconstruction of the original, in the upper section we have a simplification of the composition, while in the lower part an interpretation of the meaning of the image, which is simplified and so clearer to the blind. Both images are raised using swell paper to provide a heightened tactile experience.