Resolution Test Charts

 

                    This section has been contributed by Dr James C Brown CEng FIMechE



In this section:

Development of Novel Resolution Test Charts

Resolution test Chart Reports





Introduction


Experience with the colour test chart described in the FZ50 Test Report, which is available for download here, and with the stepped Es chart, which is available for download here, led to the conclusion that the vertical lines in the Es used in these charts made no contribution to the measurement of resolution.


In addition it was found that due to a combination of the edges of the lines in the image of the chart overlapping the edges of the pixels on the sensor, the demosaicing process and the effects of sharpening result in the 'colour' of the spaces between the lines of the Es being affected by the 'colour' of the pixels in the adjacent lines.


The test charts provided here have been designed to minimise these effects and to permit the resolution of digital cameras to be measured more precisely. As with the previous versions of my test charts copies may be downloaded for private use by clicking on the relevant links.




Test Charts Available for Download


Stepped Triple Lines - 500 & 800 pixels per cm




Stepped Lines R,G,B,K,C,M,Y - 10 pixel 500 ppcm.jpg, 260mm x 92mm - download here (5.3 MB)

Stepped Lines R,G,B,K,C,M,Y - 10 pixel 800 ppcm.jpg,162.5mm x 57.5mm - download here (5.3 MB)



Stepped Triple Lines - Double Row - 500 & 800 pixels per cm




Stepped Lines R,G,B,K,C,M,Y - 10 pixel 500 ppcm dual.jpg, 260mm x 164mm - download here

(9.8 MB)

Stepped Lines R,G,B,K,C,M,Y - 10 pixel 800 ppcm dual.jpg, 162.5mm x 102.5mm - download here

(9.8 MB)



Triple Lines 1.0 - 2.5 & 1.0 - 3.5 pixels/line - Colour Single




10 Pixel Triple Lines 1.0 - 2.5 400 ppcm.jpg, 60mm x 105mm - download here
10 Pixel Triple Lines 1.0 - 2.5 800 ppcm.jpg, 30mm x 52.5mm - download here
10 Pixel Triple Lines 1.0 - 3.5 400 ppcm.jpg, 60mm x 167.5mm - download here
10 Pixel Triple Lines 1.0 - 3.5 800 ppcm.jpg, 30mm x 83.75mm - download here



Triple Lines 1.0 - 2.5 pixels/line - 11 Step Single Colour



Dimensions 800 ppcm (35mm x 57.5mm)

11 Step Black.jpg - download here
11 Step Blue.jpg - download here
11 Step Cyan.jpg - download here
11 Step Green.jpg - download here
11 Step Magenta.jpg - download here
11 Step Red.jpg - download here
11 Step Yellow.jpg - download here



Triple Lines 1.0 - 2.5 pixels/line -  21 Step Single Colour




Dimensions 800 ppcm (53.75mm x 55mm)

21 Step Black.jpg - download here
21 Step Blue.jpg - download here
21 Step Cyan.jpg - download here
21 Step Green.jpg - download here
21 Step Magenta.jpg - download here
21 Step Red.jpg - download here
21 Step Yellow.jpg - download here




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