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summary sunday 13th Wovember. Computer Science. Sound and Images. ・Images A pixel is the smallest element of an image. A Bitmap is made up of a grid of pixels. A higher bit-depth means there are more pixels and therefore more colours present. This increases the quality of the image, but also the file size.. Pixels A Pixel represents the smallest element of a bitmap; a single colour. Each colour has a binary code assigned to it. Colour depth Images that require only 2 colours can be represented. using I bit per pixel. If images need more than 2 colours, You will need more bits per pixel - E.g: for two bits, you can have 2x2= 4 patterns. Bits Number of colours. n² 3 h nxn nxnxn A Image resolution Image resolution refers to the clarity of an image. when zoomed in to a bitmap, the pixels appear rarger. Image resolution (size of bitmap) = width x height." The number of bits used per pixel is called the Colour depth. File size of image = width x height x Colour depth. when colour depth or image resolution increases, So does file size. 1 Byle= 8 bits 1 kilobytes = 1000 bytes | megabyte = 1000 kilobytes Colour depth + resolution changing "Reducing colour depth may not always be noticeable. More bits that are stored /used to represent colours. means there will be a larger storage capacity. Smaller file size means that - images used on...
iOS User
Stefan S, iOS User
SuSSan, iOS User
a web page will download more quickly - images in emails will take less time to transmit. Metadata. Files must store additional data so that the image. can be reproduced accurately. The additional data is called meradata. This includes: ☐ Image dimensions • File format "Date and time of creation. • Geographical location of creation Details about device used • Camera settings. een or display resolution. ers to the number of pixels that a screen is set to play. Pens with a large number of pixels are considered in definition. - they can show images with enhance rity. ou try to view an image with a low resolution in full -en mode on a screen with a higher resolution, computer will have to rescate the image. •sing it to look pixelated. -formats. •mon file formats for bitmaps:/ Bitmap - .bmp PNG- png JPEG - -jpg/jpeg GIF -> . gif animated. Bitmaps are commo created by taking c The image will be stored as a grid pixels, where each. represents a colour with a unique bing digit.
lmk for more <3
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Some small questions
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Keywords
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GCSE OCR COMPUTING -sound -pictures -character sets
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Binary, Logic Gates, Hexadecimal, Hexadecimal conversions, Unicode, Bitmaps (Resolution, Colour depth, Concentration)
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This is a big topic, my notes on data storage in computing. This covers numbers, characters, images and sounds. For notes on units and compression, please check my profile
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Summary revision material about data, sound and images in Computing.
summary sunday 13th Wovember. Computer Science. Sound and Images. ・Images A pixel is the smallest element of an image. A Bitmap is made up of a grid of pixels. A higher bit-depth means there are more pixels and therefore more colours present. This increases the quality of the image, but also the file size.. Pixels A Pixel represents the smallest element of a bitmap; a single colour. Each colour has a binary code assigned to it. Colour depth Images that require only 2 colours can be represented. using I bit per pixel. If images need more than 2 colours, You will need more bits per pixel - E.g: for two bits, you can have 2x2= 4 patterns. Bits Number of colours. n² 3 h nxn nxnxn A Image resolution Image resolution refers to the clarity of an image. when zoomed in to a bitmap, the pixels appear rarger. Image resolution (size of bitmap) = width x height." The number of bits used per pixel is called the Colour depth. File size of image = width x height x Colour depth. when colour depth or image resolution increases, So does file size. 1 Byle= 8 bits 1 kilobytes = 1000 bytes | megabyte = 1000 kilobytes Colour depth + resolution changing "Reducing colour depth may not always be noticeable. More bits that are stored /used to represent colours. means there will be a larger storage capacity. Smaller file size means that - images used on...
summary sunday 13th Wovember. Computer Science. Sound and Images. ・Images A pixel is the smallest element of an image. A Bitmap is made up of a grid of pixels. A higher bit-depth means there are more pixels and therefore more colours present. This increases the quality of the image, but also the file size.. Pixels A Pixel represents the smallest element of a bitmap; a single colour. Each colour has a binary code assigned to it. Colour depth Images that require only 2 colours can be represented. using I bit per pixel. If images need more than 2 colours, You will need more bits per pixel - E.g: for two bits, you can have 2x2= 4 patterns. Bits Number of colours. n² 3 h nxn nxnxn A Image resolution Image resolution refers to the clarity of an image. when zoomed in to a bitmap, the pixels appear rarger. Image resolution (size of bitmap) = width x height." The number of bits used per pixel is called the Colour depth. File size of image = width x height x Colour depth. when colour depth or image resolution increases, So does file size. 1 Byle= 8 bits 1 kilobytes = 1000 bytes | megabyte = 1000 kilobytes Colour depth + resolution changing "Reducing colour depth may not always be noticeable. More bits that are stored /used to represent colours. means there will be a larger storage capacity. Smaller file size means that - images used on...
iOS User
Stefan S, iOS User
SuSSan, iOS User
a web page will download more quickly - images in emails will take less time to transmit. Metadata. Files must store additional data so that the image. can be reproduced accurately. The additional data is called meradata. This includes: ☐ Image dimensions • File format "Date and time of creation. • Geographical location of creation Details about device used • Camera settings. een or display resolution. ers to the number of pixels that a screen is set to play. Pens with a large number of pixels are considered in definition. - they can show images with enhance rity. ou try to view an image with a low resolution in full -en mode on a screen with a higher resolution, computer will have to rescate the image. •sing it to look pixelated. -formats. •mon file formats for bitmaps:/ Bitmap - .bmp PNG- png JPEG - -jpg/jpeg GIF -> . gif animated. Bitmaps are commo created by taking c The image will be stored as a grid pixels, where each. represents a colour with a unique bing digit.