Не самое быстрое решение, но оно дает необходимый результат. Кроме того, есть 100 * 100 = 10000 пикселей для каждого канала, а не 100, как вы показали.
import numpy as np
import pandas as pd
my_images=np.random.uniform(0,1,(1000,100,100,3))
nums = my_images.shape[0]
w = 100
h = 100
c = 3
pd.DataFrame(data= [my_images[i].flatten().reshape(w*h*c) for i in range(nums)], # values
index = ['img' + str(i) for i in range(nums)], # 1st column as index
columns= ['r' + str(i+1) for i in range(100*100)] + ['g'+str(i+1) for i in range(100*100)] + ['b'+str(i+1) for i in range(100*100)] ) # 1st row as the column names
r1 r2 r3 r4 r5 r6 r7 r8 r9 r10 r11 r12 r13 r14 r15 r16 r17 r18 r19 r20 r21 r22 r23 r24 r25 r26 r27 r28 r29 r30 r31 r32 r33 r34 r35 r36 r37 r38 r39 r40 ... b9961 b9962 b9963 b9964 b9965 b9966 b9967 b9968 b9969 b9970 b9971 b9972 b9973 b9974 b9975 b9976 b9977 b9978 b9979 b9980 b9981 b9982 b9983 b9984 b9985 b9986 b9987 b9988 b9989 b9990 b9991 b9992 b9993 b9994 b9995 b9996 b9997 b9998 b9999 b10000
img0 0.486932 0.358114 0.378462 0.962743 0.967968 0.858799 0.355605 0.557928 0.180849 0.979154 0.058116 0.287494 0.479971 0.263553 0.881374 0.875206 0.352662 0.038444 0.120535 0.000326 0.978237 0.715863 0.350651 0.136343 0.633519 0.971797 0.194671 0.981690 0.301551 0.738752 0.910106 0.723529 0.567343 0.583138 0.925730 0.885722 0.417114 0.337083 0.140824 0.889483 ... 0.649809 0.513012 0.653982 0.177253 0.188145 0.494424 0.455103 0.024664 0.012357 0.956512 0.873941 0.977735 0.374367 0.101984 0.989629 0.785725 0.839505 0.944744 0.748421 0.781885 0.233788 0.829904 0.907176 0.157434 0.382110 0.460945 0.732198 0.130351 0.607728 0.200979 0.496550 0.272893 0.490625 0.529867 0.975578 0.688915 0.219779 0.253977 0.351022 0.738245
img1 0.045102 0.028449 0.777591 0.575000 0.868562 0.192366 0.925344 0.934355 0.476159 0.336614 0.058352 0.706517 0.700616 0.697568 0.931899 0.298687 0.325758 0.844186 0.975191 0.815392 0.819782 0.942618 0.119667 0.883005 0.125012 0.314823 0.161448 0.790827 0.534900 0.844786 0.975306 0.347407 0.661538 0.098459 0.867604 0.208455 0.729929 0.063040 0.798002 0.976301 ... 0.123317 0.469142 0.022312 0.238848 0.579594 0.233403 0.111962 0.180687 0.929240 0.283651 0.125432 0.484908 0.734587 0.788714 0.675700 0.663587 0.596222 0.216500 0.783715 0.330661 0.703489 0.780786 0.111286 0.804458 0.691808 0.709701 0.874952 0.278902 0.499596 0.863403 0.554768 0.432910 0.189384 0.196691 0.024404 0.492914 0.041698 0.782992 0.330925 0.681564
img2 0.895364 0.736759 0.034967 0.331774 0.179954 0.064767 0.431156 0.345568 0.516664 0.724786 0.283170 0.077229 0.382801 0.734160 0.964772 0.630064 0.304190 0.014286 0.466788 0.624111 0.593372 0.773352 0.018929 0.515174 0.665516 0.614239 0.184120 0.940892 0.520044 0.432633 0.465579 0.458798 0.623848 0.452827 0.442585 0.722681 0.631540 0.109865 0.263037 0.432471 ... 0.344212 0.161572 0.934545 0.761583 0.048125 0.004187 0.532132 0.275795 0.730705 0.714795 0.220308 0.624861 0.518679 0.838271 0.081648 0.528557 0.316329 0.301952 0.647050 0.141154 0.528354 0.733596 0.213516 0.876608 0.399335 0.785443 0.908612 0.977647 0.869134 0.438461 0.477976 0.191026 0.008590 0.734226 0.331556 0.277559 0.358993 0.429474 0.209247 0.741306
img3 0.042249 0.215090 0.609098 0.136100 0.480906 0.270167 0.275241 0.418473 0.119309 0.075258 0.476748 0.151002 0.013587 0.695470 0.062000 0.183760 0.685605 0.224058 0.354772 0.558781 0.801372 0.136810 0.585566 0.468125 0.754648 0.205976 0.204213 0.055228 0.715287 0.069664 0.682018 0.219368 0.629850 0.469663 0.971606 0.445856 0.130807 0.859502 0.395481 0.101970 ... 0.642661 0.627955 0.962984 0.436121 0.226712 0.343389 0.158353 0.032410 0.197190 0.487362 0.649477 0.227321 0.106230 0.635838 0.822605 0.181413 0.134469 0.536877 0.229766 0.014072 0.076003 0.715866 0.962098 0.693023 0.536637 0.628003 0.953686 0.471928 0.969996 0.777448 0.709374 0.043167 0.590571 0.264927 0.034542 0.947914 0.723615 0.555356 0.292524 0.860090
img4 0.342812 0.984872 0.595325 0.560725 0.322496 0.106175 0.623969 0.517042 0.202604 0.899584 0.357242 0.211253 0.336435 0.215450 0.651622 0.296562 0.932716 0.904923 0.832153 0.297773 0.079881 0.898914 0.862357 0.219088 0.874832 0.945539 0.854319 0.141670 0.450833 0.324066 0.157684 0.506456 0.650278 0.104939 0.918043 0.615409 0.487017 0.914478 0.525752 0.532596 ... 0.052621 0.648331 0.289361 0.357715 0.054250 0.827826 0.628299 0.704747 0.777197 0.948778 0.542223 0.111109 0.034345 0.818893 0.180993 0.809252 0.258662 0.440389 0.973193 0.629529 0.722974 0.164910 0.376697 0.417736 0.402239 0.203207 0.352650 0.082466 0.723988 0.192275 0.905494 0.271835 0.148498 0.357596 0.775139 0.631658 0.683252 0.444594 0.562559 0.270776
... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ...
img995 0.838085 0.397261 0.846695 0.933139 0.620105 0.532176 0.797445 0.527347 0.239898 0.905126 0.958340 0.044355 0.066412 0.744415 0.909536 0.704189 0.798124 0.971813 0.284309 0.199504 0.707818 0.678898 0.184314 0.265278 0.286230 0.252277 0.698063 0.052999 0.163469 0.568355 0.949519 0.673165 0.845369 0.939780 0.536132 0.943460 0.154108 0.642619 0.215590 0.661864 ... 0.274670 0.237090 0.793010 0.993295 0.594697 0.767856 0.837942 0.237594 0.519923 0.396707 0.094800 0.460319 0.677104 0.054613 0.804510 0.874100 0.120772 0.383306 0.703549 0.015940 0.382384 0.117743 0.412058 0.374512 0.839501 0.533861 0.858508 0.014900 0.127974 0.784746 0.480787 0.754446 0.730582 0.213735 0.493690 0.590700 0.477921 0.767106 0.460363 0.898690
img996 0.171881 0.666083 0.567388 0.534970 0.110068 0.950682 0.738784 0.624271 0.147806 0.285420 0.009684 0.403910 0.345770 0.232941 0.261416 0.620245 0.504229 0.436067 0.822144 0.746396 0.853005 0.843115 0.587636 0.114130 0.502100 0.780388 0.819707 0.332244 0.592359 0.000251 0.156495 0.764803 0.509039 0.220428 0.829552 0.390561 0.074693 0.815926 0.113959 0.118536 ... 0.685953 0.517420 0.152370 0.961478 0.500367 0.779224 0.331803 0.628549 0.399974 0.404072 0.549934 0.142945 0.061841 0.713861 0.842240 0.740575 0.520969 0.094217 0.480275 0.609732 0.324852 0.355591 0.059871 0.571136 0.275547 0.463229 0.573066 0.628505 0.131310 0.916291 0.501336 0.734825 0.550189 0.852415 0.036260 0.163183 0.379861 0.151860 0.587352 0.558592
img997 0.260229 0.027160 0.024845 0.405843 0.153609 0.948280 0.833786 0.443430 0.733487 0.469510 0.492071 0.093200 0.748563 0.443063 0.103739 0.262570 0.326819 0.038774 0.654335 0.505306 0.025019 0.153099 0.495584 0.825881 0.127388 0.579630 0.622424 0.203833 0.264736 0.339902 0.958501 0.130448 0.809757 0.480960 0.456775 0.888074 0.660926 0.866277 0.489128 0.986085 ... 0.629622 0.532311 0.198096 0.512762 0.025338 0.179305 0.564835 0.844087 0.550143 0.044381 0.993802 0.231412 0.231025 0.069339 0.867986 0.877767 0.276351 0.438310 0.931497 0.382128 0.727942 0.755447 0.367368 0.672704 0.846903 0.960334 0.227707 0.921844 0.224192 0.481621 0.273852 0.521445 0.387418 0.594588 0.634387 0.752935 0.966900 0.286578 0.848091 0.761919
img998 0.137022 0.363908 0.840758 0.347840 0.119981 0.367948 0.039828 0.731761 0.959635 0.133150 0.344888 0.328250 0.969160 0.089202 0.044397 0.727128 0.707633 0.459997 0.049261 0.222913 0.586730 0.410247 0.689743 0.954076 0.067321 0.008652 0.250084 0.997298 0.653954 0.036369 0.209113 0.606945 0.375438 0.423460 0.874191 0.960310 0.002205 0.638605 0.722848 0.280049 ... 0.956299 0.122053 0.198945 0.632034 0.103117 0.480278 0.658445 0.703479 0.842846 0.589640 0.150563 0.580881 0.388750 0.084818 0.746425 0.590966 0.751141 0.515122 0.370861 0.233196 0.943156 0.965516 0.463034 0.055458 0.436112 0.722325 0.051160 0.443859 0.505781 0.547766 0.798339 0.890893 0.146561 0.803766 0.721480 0.386739 0.883938 0.182097 0.549544 0.276338
img999 0.744549 0.724202 0.889157 0.177200 0.120874 0.013192 0.432094 0.973115 0.825215 0.568912 0.608280 0.439619 0.067831 0.454721 0.987532 0.509805 0.760051 0.581479 0.331267 0.600631 0.780780 0.117506 0.583506 0.593765 0.976454 0.143185 0.344449 0.330625 0.188884 0.919397 0.623545 0.686960 0.423576 0.173410 0.325512 0.806801 0.492669 0.717346 0.988060 0.079150 ... 0.468972 0.621811 0.315449 0.698777 0.073734 0.252283 0.990783 0.652986 0.778134 0.263407 0.142558 0.558776 0.765833 0.641718 0.934577 0.545056 0.974763 0.392286 0.026937 0.546414 0.040816 0.939266 0.325401 0.760387 0.131496 0.495096 0.711066 0.192676 0.600273 0.266118 0.258884 0.771196 0.902020 0.572795 0.983741 0.886390 0.623550 0.236895 0.498307 0.757591
1000 rows × 30000 columns