COMPARING OF SOIL REFLECTANCE VALUES BY USING DIFFERENT PROGRAMS

The Hatra area in Nineveh governorate / Iraq has been chosen for this research because it sits on in arid and semi arid area and because of the availability of its previous study with grounded digital imags, aerial photo and satellite images. We used a specialized tool in Photo Shop program by selecting a huge number may reach to thousands of pixels , and using the histogram window of the selecting area to know the average of RGB value, then calculating its reflections in mathematical formula, and comparing it with results of last studying used the same digital images but in few pixels. This study found that there is necessary to select a large number of pixels to digital image of rough surface of soil to read the reflectance because the clear نیدفارلا ةعارز ةلجم ISSN: 2224-9796 (Online) دلجملا ) ٤٠ ( ددعلا ) ١ ( ٢٠١٢ ISSN: 1815 – 316 X (print) ١١٥ difference with the previous study, but there is no clear different with lab preparing soft surface of soil. رداصملا يداوجلا ، دؤاد ھط يداھلا دبع ھط ) ٢٠٠٦ ( . ةuلاح ةuسارد يuف يئاuنلا سuسحتلا تاuینقت مادختuسا ةuیناكمإ رضحلا ةقطنم يف يعارملا برت ضعبل روھدتلا / ىونین ةظفاحم . ةروuشنم رuیغ ریتسجام ةلاسر ، لصوملا ةعماج ، ٩٥ ةحفص . يداوجلا ، عنملادuبع قمان ، دؤاد و يداھلادبع ھط م ) ٢٠١١ ( . ةuبرتلا ناوuلأ سuلطلأ ةuیمقرلا ةاھاuضملا فینuصتلا جماuنرب مادختuساب ةuفلتخم برuت تانیعل يمقرلا دھشملا فینصتب ھتنراقمو ، ةuعارز ةuلجم نیدفارلا ، لصوملا ةعماج ، ، قارعلا ٣٩ ) ٢ ( ثحب رشنلا تحت . فuuلخ دuuبع داuuیأ ، يمیلدuuلا ) ٢٠٠٧ ( . بuuب اuuمھتقلاعو برuuتلا ةیuuساكعنإو نوuuل ةuuیوایزیفلا تافuuصلا ضع ، لuصوملا ةuعماج ، تاuباغلاو ةuعارزلا ةuیلك ، ةروuشنم رuیغ ریتuسجام ةلاسر ، ةبرتلل ةیوایمیكلاو ١٢٢ ةحفص . Anonymous (1975). Soil Taxonomy-a Basic System of Soil Classification For Making and Interpreting Soil Surveys. USDA Hanbook Number 436. United States Dpartment of Agriculture. Washington, D. C. Burdick , H . E . ( 1997 ) . Digital Imaging Theory and Applications . ENDS 489 Course Notes Fall2000 . Section 1-4 . George B.; JR.Thomas ; L. F. Ross ( 1981 ) . Calculus and Analytic Geometry .Fifth Edition. Addison –Wesley Publishing Company . Visscara , R .; C. Walter ( 2002 ) . Towards a quantitative assessment of soil ( organic carbon ) using proximally sensed digital imagery . 17 WCSS : 14 – 21 .