about photoshop...

INTRODUCTION:

We usually use Photoshop for image editing, digital painting. Photoshop mostly deals with colors. That is why it is called
as Raster(bitmap) graphics.

 For the editing of a photo at first the page should be selected as per need.
for that such thing should be considered....


1. Pixel:
    Pixels are tiny colored value or also we can say pixels are small dots which contains a color value and its location.
We can see pixels when we zoom any picture element. Pixels are measured as pixel dimension= no. of pixel(height) x no. of
pixel (width). For eg: Pixel dimension 300x300=90,000 pixels.

2. Resolution:
    Resolutions are output quality of any picture. Some used are:
Web layout= 72 dpi
Onscreen  = 96 dpi (100 is the best)
printing  = 150 (black n white) - 300 (color)dpi.







TOOL BAR:

1. MARQUEE:
    Use this tool to select any particular image parts. This is also used for background coloring, banners etc.

2. PEN TOOL:
    Used for selection. While using pen tool press "CTRL+ENTER" to stop at the middle of selection.

3. TO UNSELECT MARQUEE SELECTION: use "CTRL+D"

4. TO FILL FOREGROUND COLOR IN SELECTED AREA: "ALT+BACKSPACE"

5. TO FILL BACKGROUND COLOR IN SELECTED AREA: "CTRL+BACKSPACE"

6. TO UNDO MORE THAN ONCE: "CTRL+ALT+Z"

7. DEFAULT foreground color is "BLACK" and default background color is "WHITE". To switch to default fg/bg color press "D".

8. Free Transform: "CTRL+T"






FEATHER:
    We use feather to get smoothness in the picture. To do so:

::EXAMPLE I:: APPLYING FEATHER TO ALREADY SELECTED PICTURE.
    1. Open an image, use pen or lasso tool to select a certain part and goto SELECT>FEATHER.
    2. An option box appears. Give the required value and click ok.

::EXAMPLE II:: APPLYING FEATHER BEFORE SELECTING AN AREA.
    1. Open an image, and before selecting anything change the value of feather in the menu bar list.
    2. Now select the image and delete or copy/paste.






EDIT>FILL:
    If you want to apply a foreground, background color to images, goto image>fill. One dialog box appears.
Change the content, blending and opacity as you like and click ok.






INVERSE:
    This command will select the back or float portion of any image which is not selected. To use this command:
1. Select an image using any tool for eg. marquee, magic wand, lasso tool.    
2. Press "CTRL+SHIFT+!" or goto SELECT>INVERSE.



NOTE:   Press "]" to increase brush size.
    Press "[" to decrease brush size.
    Press "CTRL+ENTER" for selection.






IMAGE>REVEAL ALL:
    Use reveal all option inside image menu to view a hidden image.





CROP:
    If you want to delete unwanted portion of an image, we use crop from the tool palette. When in use, this option will
decrease your document size also.






HEALING TOOL:
    Open a damage photo. Choose healing tool and press "ALT" and slowly by clicking, move your posture.





GRID EFFECT:
    1. FILE>NEW. change the height & width to 10x10 pixels, resolution to 72 & check the transparency button & click ok.   
    2. Select the brush and double click on foreground color. Select your favourite color.
    3. Draw two straight lines, one horizental & other vertical.
    4. Use "SHIFT+drag" to make line straight.
    5. Press "CTRL+A" and goto edit>define pattern. A dialog box appears.
    6. Change the grid name & close the picture without saving.
    7. Open new picture and select pattern stamp tool. Choose a grid pattern and click over your picture.

            OR        OR        OR

    Open a picture, right click on picture layer>blending option>pattern overlay and select a grid and click ok