Image ProcessingImage Processing

Developing PicturesDeveloping Pictures

In the Dark RoomIn the Dark Room

What Did We Do?What Did We Do?

We made a picture by using a pin-hole We made a picture by using a pin-hole camera. A pin-hole camera is simply a camera camera. A pin-hole camera is simply a camera using film paper and a metal container, such as a using film paper and a metal container, such as a can.can.

How a Pin-hole Camera WorksHow a Pin-hole Camera Works

Pin-hole cameras have a small hole on Pin-hole cameras have a small hole on the side that only allows a single ray of light the side that only allows a single ray of light from each point on an object to pass from each point on an object to pass through the hole, so that it is imprinted on through the hole, so that it is imprinted on the film paper inside the can.the film paper inside the can.

What Happens In the Dark RoomWhat Happens In the Dark Room

There are two sides in the dark room, a dry There are two sides in the dark room, a dry side and a wet side.side and a wet side.

After taking a picture, you go to the wet side After taking a picture, you go to the wet side and dip the film in a set of chemicals that and dip the film in a set of chemicals that develops the picture.develops the picture.

WET SIDE PROCEDURE

Work LEFT to RIGHT(keep emulsion side UP)

Developer(1 minute) Water

Rinse(1 minute)

Water Rinse

(2 minutes)

Fixer(2 minutes)

What Happens In the Dark RoomWhat Happens In the Dark Room

There are two sides in the dark room, a dry There are two sides in the dark room, a dry side and a wet side.side and a wet side.

After taking a picture, you go to the wet side After taking a picture, you go to the wet side and dip the film in a set of chemicals that and dip the film in a set of chemicals that develops the picture.develops the picture.

What Happens In the Dark RoomWhat Happens In the Dark Room

There are two sides in the dark room, a dry There are two sides in the dark room, a dry side and a wet side.side and a wet side.

After taking a picture, you go to the wet side After taking a picture, you go to the wet side and dip the film in a set of chemicals that and dip the film in a set of chemicals that develops the picture.develops the picture.

After the film has gone through the wet side, After the film has gone through the wet side, it is a negative, so you take it to the dry side it is a negative, so you take it to the dry side to make a positive. We use an Enlarger to to make a positive. We use an Enlarger to make a positive.make a positive.

THE ENLARGER

Using the EnlargerUsing the Enlarger

Put the film that you took a picture with face Put the film that you took a picture with face down on another strip of film.down on another strip of film.

Cover the two strips with a glass cover.Cover the two strips with a glass cover. Turn on the machine for a set amount of Turn on the machine for a set amount of

time, about 20 seconds.time, about 20 seconds. Remove the glass cover and the negative Remove the glass cover and the negative

and you have a positive.and you have a positive.

What We LearnedWhat We Learned

We learned about the pin-hole camera, a We learned about the pin-hole camera, a simple camera that takes black and white simple camera that takes black and white pictures.pictures.

We learned how to make a positive out of a We learned how to make a positive out of a negative by using a machine called the negative by using a machine called the Enlarger.Enlarger.

We learned about the process of making We learned about the process of making photos in the dark room, and the chemicals photos in the dark room, and the chemicals involved in making it.involved in making it.

Practical Applications for Image Practical Applications for Image ProcessingProcessing

Real life - you’ve taken pictures with a Real life - you’ve taken pictures with a camera haven’t you?camera haven’t you?

SMILE!!!