Field of view

FOV (Field-Of-View) and aspect ratio

ๅŽŸ็†

้€่ง†็Ÿฉ้˜ตไธญๆˆ‘ไปฌไฝฟ็”จtopใ€bottomใ€leftใ€rightใ€nearใ€farๆฅๅฎšไน‰๏ผŒไฝ†้€šๅธธๆˆ‘ไปฌไธ่ฟ™ๆ ทๅš๏ผŒ่€Œๆ˜ฏไฝฟ็”จfovใ€aspectย ratioใ€nearใ€farๆฅๅฎšไน‰๏ผŒไฝ†ไป–ไปฌๆœฌ่ดจไธŠ้ƒฝๆ˜ฏไธ€ๆ ท็š„๏ผŒๅƒไบบ็š„็œผ็›ไนŸๆ˜ฏๆœ‰fov๏ผŒๅซๅš่ง†ๅบฆ่ฟ™ไนˆไธ€่ฏด็š„,้กพๅๆ€ไน‰๏ผŒ่ง†ๅบฆ่ถŠๅคง๏ผŒๆˆ‘ไปฌ็œ‹ๅˆฐ็š„ไบ‹็‰ฉไนŸๅฐฑ่ถŠๅคš๏ผŒไพ‹ๅฆ‚fov90ๅฐฑๆฏ”fov60็œ‹ๅˆฐ็š„ๅคš๏ผŒๅฎƒๆ˜ฏ่ง†็‚นไธญๅฟƒๅˆฐ่ง†้”ฅๅทฆไพงไธŽ่ง†็‚นไธญๅฟƒๅˆฐ่ง†้”ฅๅณไพงๆ‰€ๅผ ๅผ€็š„่ง’ๅบฆ๏ผŒๅฝ“็„ถ่ฟ™ๆ ทๅช่ƒฝ่ฎก็ฎ—ๅ‡บๅทฆๅณไพง็š„๏ผŒ่ฟ˜้œ€่ฆไธ€ไธชaspectย ratio(ๅฑๅน•็บตๆจชๆฏ”)ๆฅ่ฎก็ฎ—ไธŠไธ‹ไพง็š„ใ€‚

่ฎก็ฎ—

ๆ นๆฎไธ‰่ง’ๅ‡ฝๆ•ฐ

tanโก(FOV2)=oppositeadjacent=BCAB=topneartop=tanโก(FOV2)โˆ—nearbottom=โˆ’top

ๅฆ‚ๆžœๆˆ‘ไปฌ็š„aspectratio(ๅฎฝ้ซ˜ๆฏ”)ไธบ1็š„่ฏ๏ผŒๅˆ™

right=topleft=bottom=โˆ’top

ไฝ†้€šๅธธๆˆ‘ไปฌ็š„ๅฑๅน•็š„ๅฎฝ้ซ˜ๆฏ”้ƒฝไธๆ˜ฏ1:1็š„๏ผŒๅฆ‚

ๅ›พไธญๅณ่พนๆ‰€็คบ๏ผŒๆˆ‘ไปฌๆœ‰ๅ…ฌๅผ

widthheight=righttopwidthheight=leftbottom

(ๅฎฝไธŽๅทฆๅณๅฏนๅบ”๏ผŒ้ซ˜ไธŽไธŠไธ‹ๅฏนๅบ”) ๅˆ™ๆˆ‘ไปฌๆœ‰

right=topโˆ—aspectratioleft=bottomโˆ—aspectratio

ๅ…ถไธญ

aspectratio=widthheightbottom=โˆ’top